[java] Exercises to improve my Java programming skills

I have learned basics of Java but want to practice more. I was looking via Google and couldn't find many beginner level problems that I can solve using Java.

Any suggestions?

Go and buy the book titled "Java examples in a nutshell". In the book you will find most of practical examples.

Once you are quite good in Java SE (lets say you are able to pass SCJP), I'd suggest you get junior Java programmer job and improve yourself on real world problems

If you wanted to learn some GUI, may be tic tac toe is good. Even for console, I still find that is a fun problem. Not challenging but a little bit fun. Later you can advance some other games or port that game to GUI, client server or java applet for the web. I think if you want to learn something and get fun as well, game is a good choice:)

When learning a new language, there are some nice problem sets you can use to learn the language better.

• Project Euler has some nice problems with a strong mathematical twist.
• Practice on Google Code Jam past problems, stick to the qualification rounds for the easier problems

My recommendation is to solve problems that you're interested in, writing code that might be useful to you.

Java is a huge box. It's got a lot of computer science inside: graphics, scientific computing, relational databases, user interfaces for desktop and web, messaging and queuing, multi-threading, security, and more. Each area has their own "beginner problem". Which one do you mean?

How do you define "beginner problem"? Maybe you're having trouble because you aren't narrowing your search enough.

If your imagination is lacking, your best bet is to Google something like "java beginner practice problems" and investigate what you get back.

Or start with Sun's on-line Java tutorial and work you way all the way through it. You'll know a fair amount about Java when you're done.

You could try the problems at RosettaCode, many of which lack Java solutions at the moment. The problems are of many different difficulties, but each has a solution already in another language which should help with the algorithmic side.

I highly recommend reading the book 'Effective Java' from Joshua Bloch.