Java

A collection of resources for the Java programming language

Reference summary

Use as a handy reminder/prompt of key Java syntax (it is not a teaching book, but a "reminders" book).

Online exercises

Software

Online IDE

Java tools

University of Helsinki online course

The University of Helsinki has an excellent online resource for learning Java. You can use it as standalone notes + exercises, or you can even sign up to their MOOC, and submit completed activities for recognition. They provide the course via a Creative Commons license, so I'm able to host PDF copies here for reference as well (see the offline copy below).

The online course is split into two parts. Part 1 contains weeks 1-6, and part 2 contains weeks 7-12. Start with the setup instructions (particularly relevant if you want to submit your completed exercises to U.Helsinki for recognition).

Introducing part 1

  • Week 1: User input, printing on screen, conditional statements
  • Week 2: Loops, basics of methods
  • Week 3: Methods, the ArrayList data structure
  • Week 4: Basics of objects
  • Week 5: More on objects
  • Week 6: Tables, sorting, searching

Introducing Part 2

  • Week 7: HashMap data structure
  • Week 8: Interfaces
  • Week 9: Exceptions, reading from files
  • Week 10: Inheritance
  • Week 11: Writing into files, graphical user interface (GUI)
  • Week 12: Regular expressions, iterators, enum, recap

Some of the exercises require files provided by U Helskini in order to complete. Those files can be downloaded here:

Need help?

University of Helsinki offline archive of course

The following are PDF versions of the University of Helskini's course materials.

  • Week 1: User input, printing on screes, conditional statements
  • Week 2: Loops, basics of methods
  • Week 3: Methods, the ArrayList data structure
  • Week 4: Basics of objects
  • Week 5: More on objects
  • Week 6: Tables, sorting, searching
  • Week 7: HashMap data structure
  • Week 8: Interfaces
  • Week 9: Exceptions, reading from files
  • Week 10: Inheritance
  • Week 11: Writing into files, graphical user interface (GUI)
  • Week 12: Regular expressions, iterators, enum, recap