Java二级操操作题 骰子旋转

//*********Found**********
import javax.swing.*;
public class Java_2{
 public static void main( String args[] ){
    int frequency1 = 0, frequency2 = 0,
        frequency3 = 0, frequency4 = 0,
        frequency5 = 0, frequency6 = 0, face; 
    //骰子旋转500次的代码
    for ( int roll = 1; roll <= 500; roll++ ) {
       face = 1 + (int) ( Math.random() * 6 );
//*********Found**********
       switch (face) {
          case 1:
             ++frequency1;
             break;
          case 2:
             ++frequency2;
             break;
          case 3:
             ++frequency3;
             break;
          case 4:
             ++frequency4;
             break;
          case 5:
             ++frequency5;
             break;
          case 6:
             ++frequency6;
             break;
       }
    }
//*********Found**********
    JTextArea outputArea = new JTextArea( 7, 10 );
    outputArea.setText(
       "面\t频率" +
       "\n1\t" + frequency1 +
       "\n2\t" + frequency2 +
       "\n3\t" + frequency3 +
       "\n4\t" + frequency4 +
       "\n5\t" + frequency5 +
       "\n6\t" + frequency6 );
//*********Found**********
    JOptionPane.showMessageDialog( null, outputArea,
       "骰子旋转500次",
       JOptionPane.INFORMATION_MESSAGE );
//*********Found**********
    System.out.println( 0 );
 }
}