import javax.swing.JOptionPane;public class RandomInt {   public static void main( String args[] )   {      int value;      String output = "";      for ( int i = 1; i <= 1000; i++ ) {         value = 1 + (int) ( Math.random() * 1000 );         output += value + "  ";                  if ( i % 5 == 0 )            output += "\n";      }      JOptionPane.showMessageDialog( null, output,         "20 Random Numbers from 1 to 1000",         JOptionPane.INFORMATION_MESSAGE );      System.exit( 0 );   }}

// MethodOverload.java// Using overloaded methodspublic class MethodOverload {    public static void main(String[] args) {        System.out.println("The square of integer 7 is " + square(7));        System.out.println("\nThe square of double 7.5 is " + square(7.5));    }    public static int square(int x) {        return x * x;    }    public static double square(double y) {        return y * y;    }}