结对编程：简易四则运算 功能：进行简易的四则运算，并根据给出的结果判断正误。实现：使用java的图形化界面实现。 package six; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.lang.*;  class Num{         private int a;                 public Num()         {                   this.a = (int)(Math.random()*100);         }                 public int get_num()         {                   return this.a;         }                 public int num_sum(Num B)         {                   return this.a + B.a;         }                 public int num_dec(Num B)         {                   return this.a - B.a;         }                 public int num_c(Num B)         {                   return this.a * B.a;         }                 public int num_chu(Num B)         {                   return this.a / B.a;         }                 public void flash()         {                   this.a = (int)(Math.random()*100);         }} public class Main {    private static JFrame frame = new JFrame("简单四则运算");    private static JLabel label1 = new JLabel(" ");    private static JLabel label2 = new JLabel(" ");    private static JLabel label3 = new JLabel(" ");    private static JLabel label4 = new JLabel(" "+"="+" ");    private static JLabel label5 = new JLabel("结果");    private static JButton button = new JButton("查看");    private static JTextField text = new JTextField(5);    private static JPanel pane = new JPanel();            //容器       public static void main(String[] args) {        pane.setBorder(BorderFactory.createEmptyBorder(20,60,20,60));        pane.setLayout(new GridLayout(0,5));           //设置布局        pane.add(label1);        pane.add(label2);        pane.add(label3);        pane.add(label4);        pane.add(text);        pane.add(label5);        pane.add(button);        Num a = new Num(),b = new Num();        //int a = (int)(Math.random()*100);        //int b = (int)(Math.random()*100);        int c = (int)(Math.random()*4)+1;                   String p = " ";        final int n;                   int q = 0;        if(c == 1)        {                 p = "+";                 q = a.num_sum(b);        }        if(c == 2)        {                 p = "-";                 q = a.num_dec(b);        }        if(c == 3)        {                 p = "*";                 q = a.num_c(b);        }        if(c == 4)        {                 p = "/";                 q = a.num_chu(b);        }        n = q;                frame.getContentPane().add(pane,BorderLayout.CENTER);        button.setMnemonic(KeyEvent.VK_I);                button.addActionListener(new ActionListener(){       //鼠标单击事件            public void actionPerformed(ActionEvent e){                     if(n == Integer.parseInt(text.getText().trim()))                               label5.setText("正确！");                     else                               label5.setText("错误！");                                }        });        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        frame.pack();        label1.setText(" "+a.get_num()+" ");        label2.setText(p);        label3.setText(" "+b.get_num()+" ");               frame.setVisible(true);    }}
运算结果：