How to Run a Simple Java Program in Eclipse?

Question

As you can probably understand from the question itself, I\'m new to Java. I was given an exercise to write a Java program which receives a character, prints it and the next

Answer 1

This is a great question with some very good answers. I would like to add some pointers about how to debug your own program. Debugging is as important (if not more important) than writing code.

For one thing, Eclipse has some great debugging features. You can use this debugger to find problems in your code. I suggest that you learn how to use it. In particular, you can set watches for variables to see what value they have as you step through the execution of your code.

Alternatively, you can add calls to System.out.println() to print out the values of any variables. For example, adding the following line at the beginning of your code might help you narrow down the problem:

System.out.println(args[0]);

This would also give an ArrayIndexOutOfBoundsException if no command-line arguments are given. Then you could do something like

System.out.println(args.length);

which would print out 0. This then gives you a clue as to where the problem is.

Of course, even when you get to this point, you still might not know how to solve the problem. This is where sites like StackOverflow come in handy.

Good luck with your Java experience. Please come back when you need more help.