The following assumes you know know to develop simple standard Java programs. If you don't know this please see Eclipse Java IDE .

Create a Java project "de.vogella.debug.first" with the package "de.vogella.debug.first" and the following classes.

			
package de.vogella.debug.first;

public class Counter {
	private int result=0;
	public int getResult() {
		return result; 
	}

	public void count() {
		for (int i = 0; i < 100; i++) {
			result += i +1; 
		}
	}
}

		

			
package de.vogella.debug.first;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Counter counter = new Counter();
		counter.count();
		System.out.println("We have counted " + counter.getResult());
	}

}