Lecture notes

Martin Goik

Stuttgart Media University / MI

	Available formats:	Webhelp (this document) Zip archive for offline usage EPUB
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	Source code provided at `https://gitlab.mi.hdm-stuttgart.de/goik/GoikLectures`
	Published under the terms of the Creative Commons Attribution 4.0 International Public License.

Table of Contents

113105 Software development 1

Getting started

Lecture related resources

Using the exercises

Related resources

Coached exercises

Using plain Java™

Using Intellij IDEA

“Hello, World” and friends.
Simple calculations
A conditional
A loop

Language Fundamentals

Integer, ASCII and Unicode

Primitive types

Arithmetic limitations

Conversions

Operators and expressions

Arithmetic and logical operators
Assignment operators
Unary operators
Operator precedence

The if conditional statement

if-then-else
Using else if

The switch statement

From blocks to methods

while
do ... while
for

Logic related external exercises

Using automated tests.

Multi-dimensional arrays

Objects and Classes

Static methods

Working with objects

Object methods

Encapsulation and access control
Getter and setter methods
Signatures
Method overloading
Constructors
Scopes

Class members and methods

A mathematical table.
Interest calculations
Programmer's favourite expression
Lotteries revisited
The greatest common divisor and the common multiple

Maven project dependencies

Maven command line usage
Intellij IDEA on top of Maven

Building a library of mathematical functions.

Maximum and absolute value
Factorial, the direct way
Factorial, the recursive way
Binomials, the recursive way
Implementing exponentials.
Adding sine
Strange things happen

Unit testing

Tests and implementation
Improving the algorithm
Parameterized testing
Helpful Junit methods
Technical details
Example: A class representing fractions

Value types and reference types

Arrays reconsidered

Varargs method parameter
Reconsidering System.out.format().
java.util.Arrays helpers
Extending arrays
Understanding static int main(String[] args)
Tic-tac-toe
Providing statistical data
Prime numbers revisited
The median of a given sample.
Plotting functions

Method calls, the details

Enumerations (enum)

Enumeration by integer representation
Enumeration by dedicated class
Defining a private constructor
enum replacing class

Core Classes

Using class Math
String exercises
Analyzing file pathnames

Inheritance

Overriding equals() and hashCode()

Overriding toString()

final methods

Abstract methods

Geometry classes reconsidered

protected access

final classes

The instanceof operator

The @Override annotation.

Runtime polymorphism

Error Handling

Checked vs unchecked exceptions
Exceptions and Junit
Variants
Class java.lang.Exception

Working with Numbers

Boxing and unboxing
Number Parsing
Number Formatting
Working with Money
Generating Random Numbers

Advanced topics

interface definitions and abstract Classes

Interfaces and sorting
A nonsense generator
An interface based plotter

Application deployment I

Preparations
Exercises
Part II, Exercises

Reading character streams

Preparations
Exercises

Collections

Preparations
Collections I, Exercises
Collections I, Exercises
Collections III, Exercises
Collections IV, Exercises
Maps 1, Preparations
Exercises
Towns and country names
Creating an overview of grades

Examination bonus point projects

Weather forecast
Reverse Polish notation (RPN) calculator
Currency converter, Summer 2017
An address database, Winter 2016
Poor man's UNIX grep, Summer 2016
Project Euler's sieve, Winter 2015

Exercising past examinations

Starting an exam
Implementing the project skeleton
Finish the exam

Examination hints

Past Software Development 1 examinations

SD1 examination winter 2025
SD1 examination summer 2025
SD1 examination winter 2024
SD1 examination summer 2024
SD1 examination winter 2023
SD1 examination summer 2023
Sd1 examination winter 2022
SD1 examination winter 2021
SD1 examination summer 2021
SD1 examination winter 2020/1
SD1 examination winter 2020/2
SD1 examination summer 2020
SD1 examination winter 2019
SD1 examination summer 2019
SE1 Klausur Winter 2018
SE1 Klausur Sommer 2018
SE1 Klausur Winter 2017
SD1 Klausur 2017
SE1 Exam winter 2015
SE1 Klausur Sommer 2015
SE1 Klausur Winter 2014

Past Software Development 1 exam preparing tests

Test 01
Test 02
Test 03
Test 04
Test 05

Working with git

Working with git locally.
Shared development with centralized remote.
Conflicts

Apache Maven

The project object model pom.xml
Plugins
Dependencies
Lifecycle, phases and goals

List of software development 1 lecture exercises

113492 Technical Documentation

Software independent considerations

General remarks

Common building blocks

Block level elements

Target formats
Selected elements
Schematron
Customizing
Assemblies
Styling the editor application

Modular documents

RelaxNG Schema

Transforming documents

Target format HTML
Target format print

TeX / LaTeX
Docbook

LaTeX hello,... world
Important elements
Macro
A complete document

Project proposals

Building a reveal.js editor
Authoring journey descriptions
Gitlab pages integration of Docbook
Codingbat reloaded
XML based exercise compilations
Past projects

List of software development 1 lecture exercises

113473 Database and application development

Database features

Selected database products overview

Installation
Features
Exercises

Installation
Features
High performance sharding cluster
Exercises

JDBC: Accessing Relational Data

Persistence in Object Oriented languages

Introduction to JDBC™

Write access, principles
Write access, coding!
JDBC™ and security
Read Access
Dynamically load a JDBC™ driver
Handling surrogate keys
Transactions

Configuring a Maven based Eclipse Java™ project with Hibernate

Creating a JPA configuration

A round trip working with objects

Persisting objects
Loading Objects by primary key
Loading objects by queries
Criteria based queries

Mapping single entities and database tables

Transient properties
Properties and NULL values
Defining keys
Composed keys
Indexes (non-unique)
Renaming tables and attributes
Changing the default type mapping
Object states and transitions
XML to JPA using JAXB

Inheritance

Single table per class hierarchy
Joined subclasses
Table per concrete class

Mapping related Components and entities

Primary keys revisited
Entity and value types
Mapping components

orphanRemoval vs. CascadeType.DELETE

Project ideas

Extending UNIX grep to databases
Database copy tool
Creating data samples
Database schema evolution tool

List of Database and application development lecture exercises

113475 Software defined Infrastructure

Manual server management

Preliminaries

Hetzner cloud administration GUI

Public / private key pair
Pass phrases and ssh agent
Agent forwarding
Port forwarding
X11 forwarding
Network data transfer using scp, rsync and ssh

Prerequisites

Ubuntu / Debian Package management

Prerequisites

Cloud provider

Working with Terraform
Cloud-init
Terraform modules
Volumes
Terraform loops
Terraform and DNS
Generating web SSL certificates
Terraform states
Private networks

Preliminaries
Exercises

Recommended Preparations
Exercises

Apache web server

Preliminaries
Exercises

Exercises

Network file systems served by Samba

Prerequisites
Samba server installation

Recommended Preparations
Exercises

Introduction
Exercises

Functional checks
SNMP based checks
ssh based checks

List of Software defined Infrastructure lecture exercises

Common topics

Project documentation

Bibliographic links

List of Figures

1. How much time to invest?
2. Your biggest enemies
3. German humour
4. AI tools and learning
5. 4 most imperative study objectives
6. Tuition attendance and exam results summer 2025
7. Examinations and result
8. Moodle and tuition groups
9. BW Lehrpool pool rooms
10. Recommended reading resources I
11. Recommended reading resources II
12. Online tutorials
13. Unix and the terminal
14. Online programming, automated feedback
15. Online programming I
16. Online programming II
17. Choosing the SD1 bwLehrpool VM
18. Intellij IDEA IDE
19. Live lecture additions
20. Embedded exercises
21. Using the exercises
22. HdM mail server
23. Configure MI VPN client access
24. MI Cloud server
25. MI File server
26. MI Git versioning server
27. Coached exercises
28. Edit - compile - execute
29. Defining class Hello
30. Compiling Java™ file
31. Command line Java™ file compilation
32. Java byte code file Hello.class
33. Source code vs. bytecode
34. Executing byte code file Hello.class
35. Command line byte code file Hello.class execution
36. Wrap up: The edit - compile - execute cycle
37. Intellij IDEA requires a JDK™
38. Intellij IDEA installation
39. Idea »Ultimate« license types
40. Alternative: Using the HdM license server
41. Creating a new Java project
42. Getting first Java™ impressions
43. Manual calculation: Abacus
44. Mechanical calculation: Cash register
45. Electromechanical calculation: Zuse Z3
46. Vacuum Tube: Eniac
47. Transistor: Microprocessor ICs
48. Z80 8-bit data bus
49. Progress in hardware 1
50. Progress in hardware 2
51. Simple facts:
52. Unsigned 3 bit integer representation
53. Binary system addition
54. 3 bit two-complement representation
55. 3 bit two complement rationale: “Usual” addition
56. Signed 8 bit integer binary representation
57. 7-bit ASCII
58. 7-bit ASCII with even parity bit
59. Western European characters: ISO Latin 1 encoding
60. Unicode UTF-8 samples
61. Java types
62. Java signed integer primitive types
63. Four int literal representations of decimal 29
64. Java unsigned integer, floating point and boolean primitive types
65. Variables: Handles to memory
66. Local variable declaration
67. Declare, assign and use
68. Combining declaration and initialization
69. Compound declarations
70. Identifier in Java™:
71. Identifier name examples:
72. Java™ keywords.
73. Note on contextual keywords
74. Variable naming conventions
75. Constant variables
76. Case sensitivity
77. Define before use
78. Type safety
79. Compile time analysis
80. Type inference (JDK™ 10)
81. Forcing conversions by cast
82. Watch out!
83. Casting long to int
84. Casting double to short
85. «C» programming language “liberal” assignment policy:
86. Consequences
87. From the report
88. Dynamic typing in PERL
89. Dynamic typing in PERL, part 2
90. Using final
91. Reference type examples
92. float and double
93. Four ways representing 35
94. Choose your output representation
95. Know your limits!
96. Literal examples
97. int literals
98. Just kidding ...
99. Strange things I
100. Strange things II
101. Limited floating point arithmetic precision
102. Nearest float to 0.1F
103. FloatConverter
104. Integer division: Take care!
105. Widening from byte to short
106. Narrowing from int literal to char variable
107. A widening «ladder»
108. A narrowing «ladder»
109. The binary plus operator
110. Binary operator output type
111. Detecting arithmetic overflow (Java 8+)
112. Dividing by zero
113. Generic binary operator
114. The modulus operator %
115. Binary operator type examples
116. No binary + operator yielding byte
117. int expression assignment
118. Constant expression assignment
119. The logical “and” operator &
120. The += operator
121. The &= operator
122. Arithmetic assignment operators
123. Logical assignment operators
124. Increment operator ++
125. Different range behaviour!
126. Cast required
127. Prefix and postfix notation
128. Operator examples
129. Precedence of “*” and “/” “+” over “+” and “-”
130. A binary operator's operands evaluation priority
131. “left to right” or “right to left”
132. Operator precedence references
133. “+” acting as string concatenation operator
134. Implicit string conversion and concatenation
135. Java™ comment flavors
136. Inline comments by /* ... */
137. Javadoc™ comments
138. Statements: General syntax
139. Statement examples: Declaring and assigning variables
140. Expression vs. statement
141. Multiple statements per line
142. Debugging multiple statements per line
143. Method local variable scope
144. Nested blocks and variable scopes
145. Block purposes
146. Principle of swapping two variables
147. Swapping two variables
148. Swapping two variables using a block
149. Conditional block execution
150. if syntax
151. if ... else
152. if ... else syntax
153. Best practices comparing for equality
154. Single statement branches
155. Nested if ... else
156. Enhanced readability: if ... else if ... else
157. if ... else if ... else syntax
158. User input recipe
159. Using a Scanner class collecting user input.
160. Converting numbers to day's names
161. Numbers to day's names: The hard way
162. Better: Using switch
163. switch Syntax
164. Switching on strings
165. switch expressions
166. Assigning switch expressions
167. Allowed types for switch statements
168. Labels must be constant expressions
169. Two blocks, same logic
170. Replacing two blocks by one method
171. Passing values to methods
172. Passing values to methods
173. Why loops?
174. Number of repetitions given by user input
175. A while loop
176. Combining increment and termination condition
177. while syntax
178. Empty while body
179. A do ... while loop
180. do ... while vs. while
181. do ... while syntax
182. Frequent usage of while
183. Replacing while(...) by for(...;...;...)
184. for syntax
185. for variable scope
186. for variable scope equivalence
187. for vs. while relationship
188. Nested loops 1
189. Nested loops 2
190. Better readability: row and column in favour of i and j
191. Calculating values
192. Response to coding errors
193. Unit test concept
194. alarmClock(...) with errors
195. Testing alarmClock(...)
196. Testing alarmClock(...) details
197. Motivating Arrays
198. Per member repeating tasks
199. Example: int array of primes
200. Loop prime values
201. Mind the limit!
202. Safer: Using length
203. Even better: “for-each” style loop
204. Mind the limit, part two
205. Primitive data one step initialization
206. Array
207. Two syntax variants
208. Passing an anonymous array to a method
209. Two-dimensional arrays
210. Behind the scenes
211. Memory allocation
212. Nested array initialization
213. Nested »ragged« array initialization
214. A method adding two values
215. Syntax of method definition
216. The static modifier matters!
217. Documentation: Javadoc™ is your friend!
218. Separating usage and definition
219. Instances of a Class
220. General class structure
221. What's a class anyway?
222. Rectangle objects
223. A class describing rectangles
224. Rectangle class and instances
225. Generated diagrams
226. The new operator: Creating rectangle instances
227. Syntax creating instances
228. Assigning attribute values to class instances
229. Instance memory representation
230. References and null
231. Checking for object presence
232. Why packages ?
233. Rules and conventions
234. Fully qualified class name vs. import
235. Don't be too lazy!
236. Special: Classes in package java.lang
237. Class, package and file system
238. Source hierarchy view
239. Object methods
240. Get a rectangle's area
241. Get a rectangle area method coding
242. Scaling a rectangle
243. Scaling method implementation
244. Scaling method signature
245. Using the scale(...) method
246. Method definition syntax
247. A rectangle's perimeter
248. getPerimeter() method implementation
249. Using Rectangle.getPerimeter()
250. Access control: Overall objectives
251. Example: Two ways implementing a day's time
252. private modifier access violation
253. Absent access modifier, access violation
254. Access rules
255. “Tips on Choosing an Access Level”
256. Direct access vs. setter method
257. Why adding setter methods?
258. Implementation change: Minutes only, no hours
259. Defining type signatures
260. Type signature examples
261. Defining method signatures
262. Method signature examples: Ignore return type!
263. Method overloading: Same name, different signature
264. Overloading, alternate names
265. No overloading in »C«
266. »C« requires unique function names
267. No distinction on return type
268. Method signatures rationale
269. Method signatures rationale
270. Example: IO.print(...)
271. Creating and initializing rectangles
272. Defining a constructor
273. Constructor syntax
274. Constructors
275. Multiple overloaded constructors
276. Constructor calls within constructor
277. Instances by overloaded constructors
278. No constructor vs. default constructor
279. Non - default constructor, but no default constructor
280. Employee example package hierarchy
281. Circle and variable scopes
282. Documenting classes and methods
283. Generated Javadoc
284. Refactoring «r» ⇒ «radius»
285. Scope assignment problem
286. this overriding method scope
287. Why should we require an instance?
288. Solution: Replace instance method by class method using static
289. Club membership objectives
290. Step 1: Implementing club member names.
291. Showing membership info.
292. Step 2: Adding membership numbers.
293. Showing membership numbers.
294. Member creation steps
295. Accessing the club's overall member count?
296. Accessing the club's member count
297. Syntax accessing class members
298. static / non-static wrap up
299. Finally understanding IO.print(ln)
300. Newton's letter to Robert Hooke
301. Application execution prerequisites
302. Why Maven project management?
303. Example: Creating PDF using iText7
304. Maven iText library pom.xml definition
305. Itext transitive dependencies
306. Class location in iText library
307. Class location in iText library
308. Maven repositories
309. Maven archetypes
310. Project «lottery» depending on «common»
311. Providing project «common»
312. Publish project «Common»'s library
313. Content of archive common-1.0.jar
314. Consuming project «lottery»
315. External libraries view
316. Using Helper.factorial(...) computing $(\begin{matrix} n \\ k \end{matrix}) = \frac{n!}{k! (n - k)!}$
317. Maven artifact dependency.
318. Using the MI Sd1 project template
319. CLI example
320. Supplementary MI Maven archetypes
321. CLI testing mi-maven-archetype-quickstart
322. CLI archetype details
323. Generated project layout
324. Maven compile
325. Compilation file view
326. Maven package
327. Executing Java™ archive second-0.9.jar
328. Maven javadoc:javadoc
329. Maven clean
330. Intellij IDEA Maven support
331. Adding MI Maven server
332. New MI archetype project
333. pom.xml content changes
334. Intellij IDEA generating Javadoc™
335. Pascal's triangle representing binomial coefficients.
336. An implementation sketch for the exponential
337. Comparing exponential and approximation
338. Comparing sin(x) and its approximation.
339. Recommended reading
340. Test categories
341. Example: Computing prime numbers
342. Unit test principle
343. Test driven development
344. Steps in Unit Testing
345. Step 1 + 2: Specify method, write skeleton
346. Execution yet being flawed
347. Sample test data
348. Step 3: Junit based specification test
349. Junit skeleton test result (Maven CLI)
350. Junit skeleton test result (IDE)
351. Providing explanatory failure messages:
352. Step 3: Providing more prime tests
353. Step 3: Prime mass testing
354. Step 4: Implement skeleton
355. Step 5: Testing our first implementation
356. Implementation observation
357. Changing the implementation
358. Regression test
359. Systematic error debugging
360. Error correction in detail
361. Parameterized tests
362. CSV parameter testing
363. CSV parameter testing results
364. CSV parameter file based testing
365. Available comparison methods
366. Caution comparing float / double !!
367. Weird arithmetics?
368. Limited representation precision
369. Solving the issue
370. The @Test annotation
371. The Assertions class
372. Importing dependencies
373. Dependency archive content
374. Value vs. reference type variables
375. Different behaviour!
376. Value variable Details
377. Reference variable Details
378. Only «call-by-value» in Java™
379. «call-by-value» details
380. «call-by-reference» for objects?
381. «call-by-reference» details
382. No «call-by-reference» in Java™!
383. No «call-by-reference» details
384. C++ reference operator “&”
385. C++ offers «call-by-reference» by virtue of “&”
386. C++ «call-by-reference» details
387. Reference data one step initialization
388. Array instances are special!
389. Array creation details
390. Array parameter passing
391. Parameter passing details
392. Array initializer: Value and reference types
393. Expecting one int argument
394. One, two or three int arguments by overloading
395. Observations
396. Arbitrary number of arguments by array
397. Vararg: Syntactic sugar by ellipsis »...«
398. Varargs preconditions
399. Further reading on varargs
400. Arrays.toString(...) and Arrays.sort(...)
401. Arrays.binarySearch(...)
402. Arrays.fill(...)
403. Arrays.copyOfRange(...)
404. Arrays.equals(...)
405. Lack of extendability
406. Extending an array
407. Extension result
408. Using Arrays.copyOf()
409. static void main(String[] args)
410. Intellij IDEA run configuration
411. Intellij IDEA run configuration
412. Creating executable jar
413. Two Tic-tac-toe players fighting each other.
414. Two Tic-tac-toe players fighting each other.
415. Method calling
416. Three variable scopes
417. Scope lifetimes
418. Two runtime memory categories
419. Stack: Four operations
420. Example: Storing integer values
421. Method calling
422. Call stack trace
423. IDE debugger
424. Motivation
425. Weekly offered lectures
426. Weekly offered lectures by simple numbers
427. Weekdays int representation
428. Weekly offered lectures using constants
429. Converting index values to day names
430. Providing lecture info
431. Sample lectures
432. Pitfall #1 of 2: Bogus day index value
433. Pitfall #2 of 2: Method argument order mismatch
434. Enumeration by class instances
435. Class instance per enumeration value
436. switch no longer works
437. Re-writing getPrice()
438. Pitfall: Creating an undesired instance
439. Define a private Day constructor
440. Preventing undesired Day instance creation
441. Adding a day name attribute
442. enum Day replacing public class Day
443. switch statements working again
444. enum constructor being implicitly private
445. Openjdk source code repository
446. Java Visualizer
447. Superclass Object
448. String literals
449. OpenJDK String implementation
450. String copy constructor
451. Copy constructor and heap
452. Operator == and equals()
453. Remarks == vs. equals()
454. Operator == and equals() implications
455. equals() is being defined within respective class!
456. Math.sin(double x)
457. Guess who's inheriting the money
458. Biology and inheritance
459. Duplicate code
460. Idea: Centralize common code
461. Common and specific properties
462. Basic shape inheritance
463. Inheritance
464. Implementing Shape hierarchy
465. Creating instances
466. Shape constructor
467. Creating Rectangle instances
468. Rectangle constructor
469. Shape.equals()
470. Rectangle.equals()
471. Printing a Shape's info
472. Overwriting toString()
473. Shape extending Object
474. Logging Rectangle instances
475. Overriding toString() in Rectangle.
476. Rectangle extending Shape
477. Implementing Circle.toString()
478. Shape and toString()
479. Moving Shape instances
480. Implementing Shape movements
481. Fools are everywhere!
482. Solution: final prevents overriding
483. Calculating a shape's area
484. Desired: Polymorphic getArea() call
485. Problems:
486. abstract method getArea()
487. abstract method getArea()
488. What's a “shape” anyway?
489. No instances of abstract classes.
490. Mandatory getArea() implementation.
491. Facts about abstract fields, methods and classes.
492. Moving shapes
493. protected access
494. final classes
495. final classes rationale
496. “Defeating” polymorphism
497. Defining equals(...): Expectations
498. Defining equals(...) of Shape instances
499. Comparing center coordinates
500. Implementing Rectangle.equals()
501. Implementing Circle.equals()
502. Testing equality of Shape objects
503. Overriding Object.toString()
504. @Override: Compile time error detection
505. Meta info of an instance
506. Getting instance meta info
507. Implementing getArea()
508. Polymorphic getArea() call
509. Runtime polymorphic dispatch
510. Polymorphic dispatch pseudo implementation
511. Compile- vs. runtime errors
512. NullPointerException (NPE for short)
513. NullPointerException is a class
514. Throwing an exception
515. Catching an exception by try {...} catch {...}
516. try {...} catch {...} syntax
517. Checked and unchecked exceptions
518. Further readings
519. Checked and unchecked exceptions
520. Expected exceptions in Junit
521. Just finally, no catch
522. try-with-resources (Java™ 7)
523. Scanner implementing AutoCloseable
524. No close() method in e.g. class String
525. Method printStackTrace()
526. Ascending inheritance ordering
527. Wrong ordering
528. Implementing convert
529. Problem: “Silent” errors
530. Step 1: Find exception base class
531. Step 2: Derive CardinalException
532. Step 3: Throwing CardinalException
533. Step 4: Unit test throwing CardinalException
534. Stack of integer values
535. Java™ collection features
536. Behind the scenes
537. Boxing and unboxing
538. Boxing syntax comparison
539. Parsing Integer user input
540. Parsing binary representation
541. Standard parse methods
542. Excerpt from java.util.Locale
543. Locale properties
544. Get a NumberFormat instance
545. Create a custom formatter
546. Polymorphic number parsing
547. Limited float precision
548. Limited double precision
549. Using BigDecimal
550. Chaining BigDecimal operations
551. BigDecimal features
552. Using static double random()
553. Seeding a pseudo random generator
554. Interface examples
555. Observations
556. Writing strings to file
557. Using Text2File
558. Possible Text2File errors:
559. Employ “try-with-resources”
560. interface syntax
561. The AutoCloseable promise
562. abstract class replacement
563. interface vs. abstract class
564. interface MyAutoCloseable
565. Extending MyAutoCloseable to flush
566. Using MyFlushable
567. Inheritance hierarchy
568. Upcoming topics
569. Interfaces implemented by class String
570. The Comparable interface
571. class String and Comparable
572. Comparison examples
573. Ascending and descending names
574. API requirements
575. Sorting strings alphabetically
576. Situation dependent sorting criteria
577. Implementing flexible sorting
578. Comparator in action
579. Case insensitive sort
580. Sort descending by lambda expression
581. Account hierarchy
582. Students and lecturers
583. An array of strings
584. An associative array describing month lengths
585. Grouping towns by country names
586. Collaborative efforts
587. Project rules
588. Internal code documentation
589. Internal code documentation hints
590. Javadoc™ mismatches
591. (Automated) tests
592. Deployment and execution
593. Marking criteria
594. Sample forecast session
595. Sample forecast invocation
596. Underlying data provider
597. cities.list.json.gz providing cities
598. ma/Copy URL result to file
599. Parse city data
600. Parse weather data
601. Requirements
602. Logging
603. Minimalist token scanner
604. Scanner output -1.34 0.34 + sqrt
605. Adding error detection
606. Error message
607. Running the currency converter terminal application.
608. Exam training by Guacamole
609. Environment hints:
610. Preparing an examination
611. Generating Javadoc™.
612. Programming hints
613. The implement - test - implement cycle
614. Finishing the exam
615. Personal examination cheat sheets
616. Unit tests in examinations
617. Example interface definition
618. Corresponding test
619. Don't cheat!
620. Unit tests strategy in examinations
621. Steps creating a new project
622. Creating a project at MI gitlab
623. Cloning a git project
624. Enter project folder, add Readme.md
625. Committing change set
626. Push to upstream repository
627. Inserting a Maven project
628. git status 1
629. Adding Maven files to repository
630. git status 2
631. Commit Maven project files
632. git status 3
633. Push to upstream again
634. Reverting changes
635. Pull changes from upstream
636. From https://www.urbandictionary.com
637. Useful links
638. Initialize git project
639. Configure author related data.
640. Adding resources to project index and staging area
641. Committing change set
642. Project versioning status
643. Adding a comment
644. git diff tracing changes
645. Reverting individual file.
646. Compiling, Math.class and Print.class.
647. Math.class, Print.class and versioning.
648. Show project's log
649. Switch to an older revision ...
650. ... and forth to current master's HEAD
651. Centralized remote repository
652. Step 1: Create remote repository
653. Step 2: Retrieve remote repository address
654. Step 2: Connect to remote repository
655. Step 3: Push local to remote
656. Step 3: Pull remote to local
657. Alternative: Create remote, then clone
658. Conflicting changes
659. Commit schedule
660. User B: git push fails
661. User B: git pull fails as well
662. Merge conflict details
663. Struggling for resolution
664. Merging Print.java manually
665. Commit and push merge
666. Maven: Recommended reading
667. What is Maven anyway?
668. Maven: Facts and benefits
669. Convention Over Configuration
670. Maven project layout
671. The project object model file
672. pom.xml characteristics
673. pom.xml vs. Makefile
674. «Hello, world» pom.xml
675. Executing «compile» phase
676. Examining the Java™ version culprit
677. Resolving encoding / Java™ version issues
678. POM inheritance
679. The Super POM
680. pom-4.0.0.xml content
681. Favour https in ~/.m2/settings.xml
682. Resolving to effective pom.xml
683. Plugin architecture
684. Sample plugins
685. Example: The maven-javadoc-plugin
686. Adding test capabilities
687. Dependency listing
688. Absence of hamcrest in pom.xml
689. ~/.m2/repository/junit/junit/4.12/junit-4.12.pom
690. Transitive dependencies
691. Oblivious to test implementation: TestNG
692. Phases
693. Maven lifecyles and phases
694. hooking into phase
695. Why XML based publishing?
696. XML features
697. Editors, compositors, designers ...
698. Promises in publishing
699. Publishing reality
700. Single source publishing
701. Separating Structure, content and format
702. Separating concerns
703. Content
704. Hierarchical structure
705. Hierarchical structure, XML source
706. Presentation
707. Example 1: HTML 5, pure structure
708. Example 2: TeX / LaTeX
709. Separating structure and presentation(s)
710. Sample technical document
711. Observations
712. Pros and cons of TeX / LaTeX
713. Tools of the trade
714. Inline formatting
715. Paragraphs
716. Lists
717. Tables
718. Images
719. Mathematical formulas
720. Cross references
721. Document sectioning
722. Modular document components
723. What is Docbook?
724. Authoring and publishing
725. Document representation
726. Software centric schema
727. Document targets
728. Docbook components
729. Target format overview
730. Tooling / Software
731. Different schema languages
732. Plain HTML
733. Web help
734. Eclipse help
735. Printed output
736. Paragraph
737. Itemized list
738. Ordered list
739. Glossary list
740. Nested lists
741. Reference
742. A table
743. A MathML equation
744. A TeX equation
745. Reference
746. Figure
747. Image map + calloutlist
748. Video
749. A warning
750. Reference
751. Recursive sections
752. Non-recursive sections
753. Two different link flavours
754. Choosing a top level element
755. Allowed 5.1 top level elements
756. Schematron on top of RelaxNG
757. Example: xml:id and permalink
758. Using Display #Anchors
759. Considerations author based permalink
760. Schematron permalink rule
761. HTML customization overview
762. Target specific configuration
763. Link stability
764. use.id.as.filename = 1
765. Parameter: use.id.as.filename
766. Customization parameter ulink.target
767. callout.unicode / callout.graphics
768. Links
769. Hooking into XSL
770. Categories
771. Example: videos
772. Links
773. Customize by CSS
774. Example CSS modifications
775. Styling the editor
776. Motivating modular documents
777. Monolithic document problems
778. Document decomposition
779. A monolithic document
780. Decomposing documents
781. XML grammar defining languages
782. Address list schema
783. Format conversion problem
784. XSL template rules
785. Example: Formatting <title> elements
786. Basic FO introduction
787. XMLMind Editor
788. Oxygenxml Author
789. Vendor links
790. Inverse editing
791. Document representation
792. Components
793. BibTeX
794. Makeindex example
795. Makeindex work flow
796. Extension example: MusiXTeX
797. Flavours
798. Components
799. Editors
800. reveal.js authoring tools: Principle
801. reveal.js features #1 of 3
802. reveal.js features #2 of 3
803. reveal.js features #3 of 3
804. reveal.js observations
805. Authoring tool project goals
806. Principle
807. Required / to be acquired skills
808. Principle
809. Codingbat: Desired features
810. Desired features
811. CRUD operation
812. Query
813. Schema
814. Procedures / triggers
815. Transactions / recovery
816. Data access control
817. API support
818. Installing Docker
819. Why LDAP?
820. LDAP introduction
821. Running a Docker container
822. Using docker-compose
823. Installing Apache Directory Studio
824. Administrator access to your DIT
825. Administrator access to your server's data tree
826. Administrator access to your server's configuration
827. Terminology
828. Adding an entry
829. Adding a new attribute
830. Replacing an attribute value
831. Deleting an attribute entirely
832. Multi valued attributes
833. Set semantics of multivalued attributes
834. Deleting selected attribute values
835. Query scope
836. Query filter
837. Schema support
838. Implementations
839. Implementations
840. Exercises
841. Why MongoDB?
842. Running a Docker container
843. Using docker-compose
844. Manual user creation
845. Log in as user explorer
846. Using IntelliJ
847. Idea show all databases
848. Terminology / Hierarchy
849. Adding a document
850. Updating attributes
851. Deleting a document
852. Deleting multiple documents
853. Multi valued attributes
854. Set semantics of multivalued attributes
855. Deleting selected attribute values
856. Deleting an attribute
857. Query filter
858. Schema validation support
859. Violating required field
860. Schema types
861. Enforcing unique keys
862. On the downside
863. Implementations
864. Implementations
865. Sharding rationale
866. Sharding rationale
867. Exercises
868. Prerequisite knowledge
869. Persistence [Bauer2015]
870. Java™ transient instances
871. RDBMS persistent records
872. Persisting transient User instances
873. Observations
874. Networking between clients and database server
875. JDBC™ features
876. JDBC™ in a three-tier application
877. JDBC™ connecting application server and database.
878. JDBC™ connection parameter
879. Components of a JDBC™ URL
880. IETF Uniform Resource Identifier
881. URL examples
882. Sub protocol examples
883. No standard port assignments ...
884. ... but Postgresql made it into Linux
885. JDBC™ architecture
886. DriverManager: Bootstrapping connections
887. Example: Mysql connection implementation
888. Driver libraries
889. Driver libraries by Maven
890. Driver unavailable
891. Connection interface
892. Statement interface
893. JDBC™ instances and relationships.
894. Important Connection methods
895. Important Statement methods
896. JDBC™ and threading.
897. JDBC™ connection pooling
898. pom.xml driver runtime scope
899. Person table
900. Objective: insert person record
901. JDBC™ backed data insert
902. Result
903. Two JDBC™ configurations
904. Figure 901, “JDBC™ backed data insert ” deficiencies
905. Why properties?
906. message.properties string externalization
907. Properties code sketch
908. Intellij IDEA settings, preconditions
909. Database related unit test phases
910. Implementing unit tests
911. Spring is your friend
912. Project layout
913. Closing connections
914. Employ AutoCloseable
915. Sniffing a JDBC™ connection by an intruder.
916. Setting up Wireshark
917. Capturing results
918. Mysql™ security
919. Mysql™ security
920. Assembling SQL
921. SQL injection principle
922. Preventing traffic tickets
923. Trouble at school
924. SQL injection impact
925. SQL injection relevance, [Clarke2009]
926. Handling injection attacks, part 1
927. Handling injection attacks, part 2
928. Input filtering
929. Validating user input prior to dynamically composing SQL statements.
930. Error message being presented to the user.
931. SQL statements in Java™ applications get parsed at the database server
932. Two questions
933. Addressing performance
934. Addressing performance mitigation
935. Restating the SQL injection problem
936. Solution: Use java.sql.PreparedStatement
937. PreparedStatement principle.
938. Three phases using parameterized queries
939. PreparedStatement example
940. Injection attempt example
941. Limitation: No dynamic table support!
942. JDBC™ read and write
943. Server / client object's life cycle
944. JDBC™ record container
945. Reading data from a database server.
946. Names and birth dates of friends
947. Accessing friend's database records
948. Important ResultSet states
949. JDBC™ to Java™ type conversions
950. Java™ to JDBC™ type conversions
951. Error prone type accessors!
952. Polymorphic accessor
953. Access by column name
954. Access by column index
955. Problem: null value ambiguity
956. Resolving null value ambiguity
957. Problem: Dynamic driver configuration
958. Shim driver (facade)
959. Users and groups
960. Isolation level
961. JDBC™ Isolation level
962. Setting the isolation level
963. Reasons for using Maven
964. Transitive dependencies
965. A basic persistence.xml JPA configuration file.
966. JPA persistence provider
967. Mapping hibintro.v1.model.User instances to a database.
968. A basic User class.
969. Mapping properties to attributes.
970. Annotating integrity constraints
971. Database schema mapping instances of hibintro.v1.model.User.
972. Loading a single object by a primary key value.
973. Retrieving hibintro.v1.model.User instances by HQL.
974. Business rules for projects
975. Persistence related object states
976. Introducing inheritance mapping
977. Modelling payment.
978. A single relation mapping.
979. Mapping the inheritance hierarchy.
980. Inserting payment information
981. Figure subclasses
982. Joined subclass mapping.
983. Implementing Object.equals(Object) by natural keys
984. JPA caches.
985. Common project steps #1/3
986. Common project steps #2/3
987. Common project steps #3/3
988. Common technologies
989. UNIX grep sample
990. Similarities and differences
991. Database grep requirements
992. Connection profile handling
993. Search level specification
994. Property based searches
995. Source and target database
996. Copy process
997. Considerations
998. Sample data creation
999. Schema evolution
1000. Techniques
1001. Subscribe to lecture
1002. Documentation content
1003. Online documentation samples
1004. Create and publish a Hetzner account
1005. Your cloud project
1006. Server creation prerequisite: A Firewall
1007. Your first server
1008. Server access by ssh
1009. No ssh password based login
1010. Server access by web gui
1011. Current server security flaws
1012. Safety considerations
1013. ssh-keygen for elliptic key creation
1014. An elliptic ssh public / private key pair
1015. Result of ssh-keygen execution (client side)
1016. Transfer public key from client to server
1017. Cleaning up!
1018. Tedious: Passphrase required for each remote login
1019. Solving the passphrase issue
1020. Behind the scenes: How does it work?
1021. Intermediate host hopping
1022. Intermediate host hopping fails
1023. Intermediate host hopping options
1024. Enable ssh agent forwarding
1025. Forwarding port 80 to 2000 at localhost
1026. Frequent use e.g. connecting to remote database server
1027. X11 browser application forwarding
1028. Network file copy using scp
1029. Network file copy using rsync and ssh.
1030. Shell / Bash
1031. Choosing a text editor
1032. Secure Shell
1033. Working with files
1034. Network
1035. Processes handling
1036. Suggested readings:
1037. .deb packages
1038. The dpkg command
1039. The apt command
1040. Rationale using PPA's
1041. What's it all about?
1042. Terraform resources
1043. Creating databases
1044. Creating cloud resources
1045. Your course documentation: Code structure
1046. The env.template file
1047. Getting started: The Hetzner API token
1048. Minimal Terraform configuration
1049. Terraform init
1050. Terraform plan
1051. Terraform apply
1052. A word on storing secrets
1053. Credentials by E-Mail
1054. Problems: 😟
1055. ssh access, firewall
1056. ssh access, public key
1057. Apply ssh key access
1058. Output data details #1/2
1059. Output data details #2/2
1060. Problem 2: VCS and visible secrets 😱
1061. Addressing secrets by variable
1062. Addressing secrets by file
1063. Addressing secrets by Bash .env file
1064. Introduction and reference
1065. In a nutshell
1066. Configuration options
1067. Bash DIY
1068. Terraform interface to Cloud Init
1069. Using template files
1070. cloud-init file validation
1071. Yaml syntax quirk 1: Missing indentation
1072. Yaml missing indentation resolution
1073. Yaml syntax quirk 2: Wrong indentation
1074. Solving Yaml quirks using yamlencode / JSON
1075. Cloud-init configuration file validation
1076. Watch out for your enemies!
1077. Problem: Duplicate known_hosts entry on re-creating server
1078. Solution: Generating known_hosts ...
1079. ... and ssh wrapper
1080. Failsafe console login
1081. Avoiding Yaml parsing issues
1082. Terraform module Documentation
1083. Example: Creating a JSON host meta data file
1084. Parent module / sub module layout
1085. Parent module implementation
1086. Sub module implementation
1087. Sub module, JSON template file Tpl/hostdata.json and result
1088. Parent module vs. sub module context
1089. A volume: The easy way
1090. Unix mount
1091. Volume details
1092. Providing a mount point's name
1093. De-coupling server and volume creation
1094. Loop documentation
1095. Using count
1096. Subdomain per group
1097. Key file location
1098. Querying DNS by zone transfer
1099. Creating an »A« record with TTL=10
1100. Modify by delete/create
1101. Mind record caching
1102. Bind server ns1.hdm-stuttgart.cloud
1103. DNS provider
1104. DNS provider configuration
1105. Defining an “A” record
1106. Understanding web certificates
1107. Certificate trust level
1108. Certificates by Terraform
1109. dns_challenge provider
1110. rfc2136 provider configuration
1111. Bind server log file
1112. Private subnet overview
1113. Terraform network and subnetwork creation
1114. Gateway: External and internal interface
1115. intern host
1116. Lack of internet access
1117. Possible solutions
1118. http proxy apt-cacher-ng
1119. Cloud-init problem
1120. Service ready query script
1121. Terraform “service ready” dependency hook
1122. Documentation links
1123. DNS query commands
1124. DNS forward lookup
1125. Display A-record result only
1126. Important record types
1127. Name Servers: Query type NS
1128. Recommended readings
1129. Openldap server documentation
1130. What is LDAP anyway?
1131. LDAP Server cli bind
1132. Document Information Tree (DIT)
1133. Relative and absolute DNs
1134. User example
1135. objectClass
1136. objectClass clarifications
1137. Augmenting inetOrgPerson by posixAccount
1138. Structural objectClass definitions
1139. Search scopes
1140. Predicate based queries
1141. LDAP bind types
1142. LDIF exchange format
1143. LDIF sample
1144. OpenLdap server architecture
1145. An example LDAP Tree
1146. External documentation
1147. URI to filesystem mapping
1148. Virtual hosting
1149. Implementing virtual hosting
1150. IP based virtual hosting
1151. IP based, pros / cons
1152. Name based virtual hosting
1153. Name based, pros / cons
1154. LDAP backed authentication
1155. PHP FPM server
1156. File services
1157. Customer demands
1158. Driving factors
1159. Selected cloud file services
1160. Selected self hosting products
1161. Nextcloud features
1162. Lightning integration
1163. Installation
1164. Docker hub
1165. Search images
1166. Pull image using CLI
1167. Pull Nextcloud image
1168. Nextcloud based on Alpine
1169. Inspect image
1170. Search an image's tags
1171. Nextcloud image by version
1172. List images by CLI
1173. Nextcloud latest image
1174. Duplicate Nextcloud images
1175. Maven ringing a bell?
1176. Un tag image by version
1177. Remove image by version
1178. Starting Nextcloud container
1179. List running containers
1180. Enter running container
1181. Remove container
1182. List volumes
1183. List orphaned volumes
1184. Remove volumes
1185. Technical features
1186. Documentation tool chain proposal

List of Tables

1. 4 Byte Two's complement representation of int values.
2. Exercises in 113105 Software development 1
3. Exercises in 113492 Technical Documentation
4. Exercises in 113473 Database and application development
5. Exercises in 113475 Software defined Infrastructure

List of Equations

1. Calculating binomials by cancelling common factors.
1. Power series definition of $f (x) = e^{x}$
2. Power series definition of $f (x) = \sin (x)$
3. Reordering of terms with respect to an implementation.

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