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);

    }

}

View Code

重新写了一遍代码，还没写完，仍待完善，未加封装等。