Multiple java classes in one file.. See revisions!

All.java

public class All
{
  void method() {
    System.out.println("Hello from All");
  }
}

class Foo
{
  void method() {
    System.out.println("Hello from Foo");
  }
}

Test.java

class Test
{
  public static void main (String[] args) {
    new All().method();
    new Foo().method();
    System.exit(0);
  }
}