java程序设计教程(第六版)课后习题答案(15)

public int Sum()

{

int sum=faceValue+faceValue1;

return sum;

}

public String toString()

{

String result=Integer.toString(faceValue);

return result;

}

}

public class RollingDice2 {

public static void main(String[] args) {

PairOfDice die1=new PairOfDice();

int faceValue=die1.roll();

int faceValue1=die1.roll1();

System.out.println("faceValue="+faceValue+"

faceValue1="+faceValue1);

int sum=die1.Sum();

System.out.println("sum="+sum);

PairOfDice die2=new PairOfDice();

die2.setFaceValue(4);

int faceValue2=die2.getFaceValue();

System.out.println("faceValue2="+faceValue2);

die2.setFaceValue1(3);

int faceValue3=die2.getFaceValue1();

System.out.println("faceValue3="+faceValue3);

int sum2=die2.Sum();

System.out.println("sum2="+sum2);

}

}

App4.13源程序：

//PushDisplayPanel.java

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class PushDisplayPanel extends JPanel {

/**

*

*/