附作业，动手动脑……

// RandomInt.java
// Shifted, scaled random integers
import javax.swing.JOptionPane;

public class Random {
   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 % 20 == 0 )
            output += "
";
      }

      JOptionPane.showMessageDialog( null, output,
         "20 Random Numbers from 1 to 6",
         JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );
   }
}