四则运算教学程序-优快云博客

本文介绍了一个使用Java编写的简单四则运算练习程序。该程序可在Eclipse环境下运行，通过随机生成算术题并让用户输入答案的方式帮助学习者掌握基本的数学运算技巧。

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);
    }
}