• Getting started
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Aus „Der Postillion“ :

Mann, der am Handy

nur mal eben die Uhrzeit nachschauen wollte,

chattet acht Minuten auf WhatsApp,

schaut drei YouTube-Videos

und liest einen Artikel über Peru,

weiß aber am Ende immer noch nicht, wie spät es ist

Cornell University paper: How AI Impacts Skill Formation

... We find that AI use impairs conceptual understanding, code reading, and debugging abilities, without delivering significant efficiency gains on average ...

  1. MANAGE YOUR TIME!

  2. MANAGE YOUR TIME!

  3. MANAGE YOUR TIME!

  4. MANAGE YOUR TIME!

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  • Final Examination

  • Tests during tuition sessions

  1. Moodle course 113105 Software-Entwicklung 1

  2. Einteilung in Übungsgruppen

Room location provided by »Horst«
  • Getting started
    • ➟ Lecture related resources
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Primary
Secondary
Bradley Kjell: Introduction to Computer Science using Java
Udemy: Java Tutorial for Complete Beginners

Video tutorials and related source code examples. Registration required.

http://codingbat.com

No registration required.

https://www.codewars.com
codeabbey.com

Problem list.

rosettacode.org

Programming tasks (including solutions for multiple languages).

reddit.com

Daily Programmer.

Project Euler

Registration required for keeping track of your exercises' status. The following exercises in particular are considered to be useful with respect to this lecture:

1, 2, 4, 5, 8, 9, 11.

Java Programming Tutorial

Basic and more difficult exercises

Choosing the SD1 bwLehrpool VM
Live lecture additions
  • Getting started
    • ➟ Using the exercises
Using the exercises
  • Getting started
    • ➟ HdM and MI related resources

Either of:
MI Cloud server
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  • Install Nextcloud Files sync client application for your operating system on your own device(s).

  • Connect to Server https://cloud.mi.hdm-stuttgart.de on both your own device(s) and a MI Pool PC.

    Either accept the default »Nextcloud« sync folder name or choose a suitable one.

  • Add .idea to the list of ignored files to the Nextcloud sync client on all devices.

  • Create a folder hierarchy e.g. Lectures/Sd1 within the Nextcloud sync folder on either one device.

  • Watch the other device(s) for correct synchronization after a minute at max.

  • Unzip the Sd1.zip file from Starting from and extending class Hello into Lectures/Sd1. Watch again for correct synchronization

  • Accessing your computer pool home directory.

  • Domain hdm, requires username hdm\xy123 for login

  • Windows share, e.g. \\fs.mi.hdm-stuttgart.de\xy123 or \\10.73.128.10\xy123.

  • Requires Mi VPN.

  • Getting started
    • ➟ Coached exercises

  • Tuesday and Wednesday 17:45-19:15.

  • Seminar groups of ~12 participants assigned to a tutor.

  • Getting started
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// Filename HelloWorld.java ❶
void main() ❷ {
    IO.println("Hello world"); ❸
}
Compiling file
~/tmp$ ls -al Hello.class 
ls: cannot access 'Hello.class': No such file or directory

~/tmp$ javac Hello.java 

~/tmp$ ls -al Hello.class 
-rw-r--r-- 1 goik fb1prof 419 Sep 23 15:44 Hello.class
Êþº¾^@^@^@6^@^]
^@^F^@^O        ^@^P^@^Q^H^@^R
^@^S^@^T^G^@^U^G^@^V^A^@^F<init>^A^@^C()V^A^@^DCode^A^@^OLineNumberTable^A^@^Dmain^A^@^V(\
  [Ljava/lang/String;)V^A^@
SourceFile^A^@^OHello.java^L^@^G^@^H^G^@^W^L^@^X^@^Y^A^@^LHello, world^G^@^Z^L^@^[^@\
  ^\^A^@
Hello^A^@^Pjava/lang/Object^A^@^Pjava/lang/System^A^@^Cout^A^@^ULjava/io/PrintStream;\
  ^A^@^Sjava/io/PrintStream^A^@^Gprintln^A^@^U(Ljava/lang/String;)V^@!^@^E^@^F^@^@^@^@^@^\
  B^@^A^@^G^@^H^@^A^@    ^@^@^@^]^@^A^@^A^@^@^@^E*·^@^A±^@^@^@^A^@
^@^@^@^F^@^A^@^@^@^B^@  ^@^K^@^L^@^A^@  ^@^@^@%^@^B^@^A^@^@^@   ²^@^B^R^C¶^@^D±^@^@^@^A^@
^@^@^@
^@^B^@^@^@^D^@^H^@^E^@^A^@^M^@^@^@^B^@^N
Hello.java Hello.class

  • Human readable (kind of 😆).

  • High abstraction level.

  • Text file

  • Machine readable instructions.

  • Non-editable (usually).

  • Binary file.
Executing byte code file Hello.class
> java Hello
Hello, world

Remark: This executes Hello.class, not Hello.java.

  • Edit your code using a text editor resulting in a file Hello.java: 

    void main() {
   IO.println("Hello world");
}

  • Compile to byte file Hello.class: 

    javac Hello.java

  • Execute Hello.class using your Java virtual machine (JVM): 

    java Hello
Hello world

Prefer a Long Term Release (LTS) e.g. 21, 25, ...

  • Windows / Mac-OS: Manual Oracle or OpenJDK installation.

  • Linux: Package install

    Debian / Ubuntu Fedora / Redhat 
    apt install openjdk-25-jdk
    		 
    dnf install java-25-openjdk-devel

  • IntelliJ IDEA Toolbox based installation

  • Install »IntelliJIDEA«.
installation
Alternative: Using the HdM license server

Insert address:

http://jetbrains.mi.hdm-stuttgart.de:11111

External usage requires VPN !

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  • Getting started
    • ➟ Play!

  • Copy code you probably do not (yet) completely understand

  • Try to guess whats going on

  • Execute and watch the outcome

  • Add minor modifications and re-execute.

  • Don't worry: You'll get a full understanding later. (Promised! 🙄)

  1. Starting from and extending class Hello
  2. Working with variables
  3. A conditional
  4. A loop