Sample Java code

A function to average the numbers in an array


float average(float numbers[])
{
  double sum=0.0;
  for(int i=0; i<numbers.length; i++)
    sum += numbers[i];

  return sum/numbers.length;
}

The classic "Hello World" program


public class HelloWorld
{
  public static void main(String args[])
    {
      System.out.println("Hello, world!");
    }
}