作业5 四则运算 测试与封装 5.2

编译环境：Eclipse

开发人员：钟鹏升

开发时间:2015-05-8

import java.awt.*;
import java.math.BigDecimal;
import java.util.Random;
import java.awt.EventQueue;

import javax.swing.*;
import javax.swing.border.EmptyBorder;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;


public class SZYS extends JFrame {
    int a;
    int b;
    int op;
    String text1,text2,text3;
    int num1,num2,num3;
    int result;

    private JPanel contentPane;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    SZYS frame = new SZYS();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public SZYS() {
        String Operator = null;
        getContentPane().setLayout(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 250);
        setLocationRelativeTo(null);
        setResizable(false);
        setTitle("四则运算");
        JLabel lable1=new JLabel("四则运算");
        lable1.setFont(new Font("宋体", Font.PLAIN, 24));
        lable1.setBounds(170, 15, 96, 30);
        getContentPane().add(lable1);
        JTextField textField1 = new JTextField();
        textField1.setBounds(50, 65, 40, 30);
        getContentPane().add(textField1);
        JTextField textField2 = new JTextField();    
        textField2.setBounds(160, 65, 40, 30);
        getContentPane().add(textField2);
        JLabel lable3=new JLabel("＝");
        lable3.setFont(new Font("宋体", Font.PLAIN, 24));
        lable3.setBounds(230, 65, 40, 30);
        getContentPane().add(lable3);
        JTextField textField3 = new JTextField();    
        textField3.setBounds(290, 65, 40, 30);
        getContentPane().add(textField3);
        JButton Button1  = new JButton("确定");
        Button1.setBounds(350, 65, 60, 30);
        getContentPane().add(Button1);
        JButton Button2  = new JButton("再做一次");
        Button2.setBounds(170, 180, 90, 30);
        getContentPane().add(Button2);
        int op=new Random().nextInt(4);
        switch(op)
        {
        case 0:        
                Operator=new String("＋");
            break;
        case 1:
                Operator=new String("－");
            break;
        case 2:
                Operator=new String("×");
            break;
        case 3:
                Operator=new String("÷");            
            break;
        }
        JLabel lable2=new JLabel(Operator);
        lable2.setFont(new Font("宋体", Font.PLAIN, 24));
        lable2.setBounds(110, 65, 40, 30);
        getContentPane().add(lable2);
        Button1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {    
                text1=textField1.getText();
                text2=textField2.getText();
                text3=textField3.getText();
                num1=Integer.parseInt(text1);
                num2=Integer.parseInt(text2);
                num3=Integer.parseInt(text3);
                
                if(op==0)
                {
                    result=num1+num2;
                }
                if(op==1)
                {
                    result=num1-num2;
                }
                if(op==2)
                {
                    result=num1*num2;
                }
                if(op==3)
                {
                    result=num1/num2;
                }
                if(num3==result)
                {
                    JOptionPane.showMessageDialog(null, "恭喜你！答对了！","提示",JOptionPane.ERROR_MESSAGE);
                }
                else
                    JOptionPane.showMessageDialog(null, "答错了！答案是"+result+"！","提示",JOptionPane.ERROR_MESSAGE);
            }
        });
//        JTextArea textbox = new JTextArea(200,20);
//        textbox.setBounds(120, 110, 200, 60);
//            textbox.setText("恭喜你！\n答对了！");
//        textbox.setEditable(false);
//        getContentPane().add(textbox);
    }
}

重新写了一遍代码，还没写完，仍待完善，未加封装等。