Recommended external exercises

Bradley Kjell's Introduction to Computer Science using Java

Original English version and German translation.

codeabbey.com

Problem list.

rosettacode.org

Programming tasks (including solutions for multiple languages).

reddit.com

Daily Programmer.

Project Euler

You will have to register without requiring an E-Mail. This is only intended to provide a profile for keeping track of your exercises' status. The following exercises are meant to be useful with respect to the current lectures and have in part been added as regular exercises to these lecture notes as well:

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

Java Programming Tutorial

Basic and more difficult exercises

Java Programming Exercises

Take the easier exercises.