• 四则运算实现2(JAVA)


    之前做了个流程版的,这里放最后的总结版

    先讲功能实现:

    1.整体程序是个100以内的四则运算出题器;

    2.做了个选择菜单,你可以自由选择需要做加减乘除任意一项的四则运算练习;

    3.增加了内层中的返回功能,使得运行过程中不必退出;

    4.出题器中提供出题检验答案揭示答案功能。

    下面是程序实现截图以及代码实现:

    菜单面板:

    package Live;
    
    import java.awt.*;
    import javax.swing.*;
    import java.awt.event.*;
    
    
    public class SizeCaidan extends JFrame{
        
        JFrame f = new JFrame("运算选择");
        JPanel p = new JPanel();
        
         public SizeCaidan() {
            JButton b1 = new JButton("加法练习");
            JButton b2 = new JButton("减法练习");
            JButton b3 = new JButton("乘法练习");
            JButton b4 = new JButton("除法练习");
            JButton ex = new JButton("退出");
            b1.addActionListener(new Monitor2());
            b2.addActionListener(new Monitor2());
            b3.addActionListener(new Monitor2());
            b4.addActionListener(new Monitor2());
            ex.addActionListener(new Monitor2());
            f.addWindowListener(new Wind());
            f.add(p);
            p.setLayout(new GridLayout(1, 2));
            
            Icon icon=new ImageIcon("src/Live/gdjssfdx.jpg");//
            JLabel label=new JLabel(icon);
            label.setBounds(0,0,400,350);
            f.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));
            
            JPanel jp = (JPanel)f.getContentPane();
            jp.setOpaque(false);//
            
            
            JLabel l = new JLabel();
            JPanel p2 = new JPanel();
            p.add(l);
            p.add(p2);
            p2.setLayout(new GridLayout(5, 1));
            p2.add(b1);
            p2.add(b2);
            p2.add(b3);
            p2.add(b4);
            p2.add(ex);
            
            p.setOpaque(false);
            
            f.setBounds(200, 200, 400, 400);
            f.setVisible(true);
        }
        
        
        
    
        public static void main(String[] args) {
            new SizeCaidan();
        }
    
        private class Wind extends WindowAdapter {
            public void windowClosing(WindowEvent e) {
                f.setVisible(false);
                System.exit(0);
            }
        }
    
        private class Monitor2 implements ActionListener {
    
            @Override
            public void actionPerformed(ActionEvent e) {
                if (e.getActionCommand().equals("退出")) {
                    //new SizeCaidan();
                    System.exit(0);
                }
    
                if (e.getActionCommand().equals("加法练习")) {
                    new NumJframe();
                    f.setVisible(false);
                }
                
                if (e.getActionCommand().equals("减法练习")) {
                    new NumJframe2();
                    f.setVisible(false);
                }
                if (e.getActionCommand().equals("乘法练习")) {
                    new NumJframe3();
                    f.setVisible(false);
                }
                if (e.getActionCommand().equals("除法练习")) {
                    new NumJframe4();
                    f.setVisible(false);
                }
                
            }
        }
    
    }
    菜单面板

    加法练习面板:

     

    package Live;
    
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;
    
    import Live.JiafaSum;
    
    public class Jia_1 {
        public static void main(String[] args) {
            new NumJframe();
        }
    }
    
    class JiafaSum {// 定义全局变量(其实就是类变量,因为在JAVA中不存在全局变量的声明,但是类默认是static的,
                    // 所以采用定义类变量的方法)
        public static int sum = 0;
    }
    
    class NumJframe extends JFrame {
        public NumJframe() {
            setLayout(null);
            Container con = getContentPane();// 创建一个内容面板容器
            bank1();// 获得题目
            bank2();// 确认答案
            bank3();//返回
            bank4();//揭示答案
            setTitle("100以內的加法测试");
            setBounds(200, 200, 600, 300);// 设置出现位置和窗口大小
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 设置关闭方式
            setVisible(true);// 设置是否展示窗口
            con.setBackground(Color.yellow);
        }
        
        void bank1() {// 获得题目按钮区
            JTextField jt = new JTextField();// 文本框1
            jt.setBounds(120, 40, 200, 30);
            JButton jb1 = new JButton();// 按钮1
            jb1.setBounds(20, 40, 100, 30);
            jb1.setText("获得题目");
            jb1.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int jiashu1 = (int) (Math.random() * 100 + 1);
                    int jiashu2 = (int) (Math.random() * 100 + 1);
                    String js1 = "" + jiashu1;
                    String js2 = "" + jiashu2;
                    JiafaSum.sum = jiashu1 + jiashu2;
                    jt.setText(js1 + "+" + js2 + "=" + "");
                }
            });
            add(jt);
            add(jb1);
        }
        
        void bank2() {// 确认答案按钮区
            JTextField jt2 = new JTextField();// 文本框2
            jt2.setBounds(120, 75, 200, 30);
            JButton jb2 = new JButton();// 按钮2
            jb2.setBounds(20, 75, 100, 30);
            jb2.setText("确认答案");
            jb2.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int sum = JiafaSum.sum;
                    String inputSum = jt2.getText();
                    
                    //System.out.println("sum="+sum);
                    //System.out.println("inputSum="+inputSum);
                    if(inputSum == null) {
                        System.out.println("你的输入有误,请重新输入一个整数:");
                    }
                    int inputsum = Integer.parseInt(inputSum);
                    if (inputsum == sum) {
                        JOptionPane.showMessageDialog(null,"答案正确","消息对话框",JOptionPane.INFORMATION_MESSAGE);
                    }
    
                    else {
                        JOptionPane.showMessageDialog(null,"答案错误","消息对话框",JOptionPane.WARNING_MESSAGE);
                    }
                }
            });
            add(jt2);
            add(jb2);
        }
        
        void bank3() {//返回区
            JButton jb3 = new JButton();//
            jb3.setBounds(0, 0, 100, 25);
            jb3.setText("返回");
            jb3.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    setVisible(false);
                    new SizeCaidan();
                }
            });
        add(jb3);
        }
        
        void bank4() {//输出答案区
            JTextField jt4 = new JTextField();// 文本框1
            jt4.setBounds(120, 110, 200, 30);
            JButton jb4 = new JButton();// 按钮1
            jb4.setBounds(20, 110, 100, 30);
            jb4.setText("揭示答案");
            jb4.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    jt4.setText(JiafaSum.sum+"");
                }
            });
            add(jt4);
            add(jb4);
            
        }
    }
    加法

    以加法为例,其他三则运算也类似,以下直接贴出代码

    (PS:除法中因为变量提取为int型,所以除法结果也只保留整数部分)

    package Live;
    
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;
    
    public class Jian_1 {
        public static void main(String[] args) {
            new NumJframe2();
        }
    }
    
    class JianfaSum {// 定义全局变量(其实就是类变量,因为在JAVA中不存在全局变量的声明,但是类默认是static的,
                        // 所以采用定义类变量的方法)
        public static int sum2 = 0;
    }
    
    class NumJframe2 extends JFrame {
        public NumJframe2() {
            setLayout(null);
            Container con = getContentPane();// 创建一个内容面板容器
            bank1();// 获得题目
            bank2();// 确认答案
            bank3();
            bank4();
            setTitle("100以內的减法测试");
            setBounds(200, 200, 600, 300);// 设置出现位置和窗口大小
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 设置关闭方式
            setVisible(true);// 设置是否展示窗口
            con.setBackground(Color.cyan);
        }
    
        void bank1() {// 获得题目按钮区
            JTextField jt = new JTextField();// 文本框1
            jt.setBounds(120, 40, 200, 30);
            JButton jb1 = new JButton();// 按钮1
            jb1.setBounds(20, 40, 100, 30);
            jb1.setText("获得题目");
            jb1.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int jianshu1 = (int) (Math.random() * 100 + 1);
                    int jianshu2 = (int) (Math.random() * 100 + 1);
                    String js1 = "" + jianshu1;
                    String js2 = "" + jianshu2;
                    JianfaSum.sum2 = jianshu1 - jianshu2;
                    jt.setText(js1 + "-" + js2 + "=" + "");
                }
            });
            add(jt);
            add(jb1);
        }
    
        void bank2() {// 确认答案按钮区
            JTextField jt2 = new JTextField();// 文本框2
            jt2.setBounds(120, 75, 200, 30);
            JButton jb2 = new JButton();// 按钮1
            jb2.setBounds(20, 75, 100, 30);
            jb2.setText("确认答案");
            jb2.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int sum = JianfaSum.sum2;
                    String inputSum = jt2.getText();
    
                    // System.out.println("sum="+sum);
                    // System.out.println("inputSum="+inputSum);
                    if (inputSum == null) {
                        System.out.println("你的输入有误,请重新输入一个整数:");
                    }
                    int inputsum = Integer.parseInt(inputSum);
                    if (inputsum == sum) {
                        JOptionPane.showMessageDialog(null, "答案正确", "消息对话框", JOptionPane.INFORMATION_MESSAGE);
                    }
    
                    else {
                        JOptionPane.showMessageDialog(null, "答案错误", "消息对话框", JOptionPane.WARNING_MESSAGE);
                    }
                }
    
            });
            add(jt2);
            add(jb2);
        }
        void bank3() {//返回区
               JButton jb3 = new JButton();//
               jb3.setBounds(0, 0, 100, 25);
               jb3.setText("返回");
               jb3.addActionListener(new ActionListener() {
                   public void actionPerformed(ActionEvent e) {
                       setVisible(false);
                       new SizeCaidan();
                   }
               });
           add(jb3);
        }
        void bank4() {//输出答案区
            JTextField jt4 = new JTextField();// 文本框1
            jt4.setBounds(120, 110, 200, 30);
            JButton jb4 = new JButton();// 按钮1
            jb4.setBounds(20, 110, 100, 30);
            jb4.setText("揭示答案");
            jb4.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    jt4.setText(JianfaSum.sum2+"");
                }
            });
            add(jt4);
            add(jb4);
        }
    }
    减法
    package Live;
    
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;
    
    
    
    public class Cheng {
        public static void main(String[] args) {
            new NumJframe3();
        }
    }
    
    class ChengfaSum {// 定义全局变量(其实就是类变量,因为在JAVA中不存在全局变量的声明,但是类默认是static的,
                    // 所以采用定义类变量的方法)
        public static int sum3 = 0;
    }
    
    class NumJframe3 extends JFrame {
        public NumJframe3() {
            setLayout(null);
            Container con = getContentPane();// 创建一个内容面板容器
            bank1();// 获得题目
            bank2();// 确认答案
            bank3();
            bank4();
            setTitle("100以內的乘法测试");
            setBounds(200, 200, 600, 300);// 设置出现位置和窗口大小
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 设置关闭方式
            setVisible(true);// 设置是否展示窗口
            con.setBackground(Color.darkGray);
        }
        
        void bank1() {// 获得题目按钮区
            JTextField jt = new JTextField();// 文本框1
            jt.setBounds(120, 40, 200, 30);
            JButton jb1 = new JButton();// 按钮1
            jb1.setBounds(20, 40, 100, 30);
            jb1.setText("获得题目");
            jb1.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int jiashu1 = (int) (Math.random() * 100 + 1);
                    int jiashu2 = (int) (Math.random() * 100 + 1);
                    String js1 = "" + jiashu1;
                    String js2 = "" + jiashu2;
                    ChengfaSum.sum3 = jiashu1 * jiashu2;
                    jt.setText(js1 + "X" + js2 + "=" + "");
                }
            });
            add(jt);
            add(jb1);
        }
        
        void bank2() {// 确认答案按钮区
            JTextField jt2 = new JTextField();// 文本框2
            jt2.setBounds(120, 75, 200, 30);
            JButton jb2 = new JButton();// 按钮1
            jb2.setBounds(20, 75, 100, 30);
            jb2.setText("确认答案");
            jb2.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int sum = ChengfaSum.sum3;
                    String inputSum = jt2.getText();
                    
                    //System.out.println("sum="+sum);
                    //System.out.println("inputSum="+inputSum);
                    if(inputSum == null) {
                        System.out.println("你的输入有误,请重新输入一个整数:");
                    }
                    int inputsum = Integer.parseInt(inputSum);
                    if (inputsum == sum) {
                        JOptionPane.showMessageDialog(null,"答案正确","消息对话框",JOptionPane.INFORMATION_MESSAGE);
                    }
    
                    else {
                        JOptionPane.showMessageDialog(null,"答案错误","消息对话框",JOptionPane.WARNING_MESSAGE);
                    }
                }
    
    
    
            });
            add(jt2);
            add(jb2);
        }
        void bank3() {//返回区
              JButton jb3 = new JButton();//
              jb3.setBounds(0, 0, 100, 25);
              jb3.setText("返回");
              jb3.addActionListener(new ActionListener() {
                  public void actionPerformed(ActionEvent e) {
                      setVisible(false);
                      new SizeCaidan();
                  }
              });
          add(jb3);
       }
        void bank4() {//输出答案区
            JTextField jt4 = new JTextField();// 文本框1
            jt4.setBounds(120, 110, 200, 30);
            JButton jb4 = new JButton();// 按钮1
            jb4.setBounds(20, 110, 100, 30);
            jb4.setText("揭示答案");
            jb4.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    jt4.setText(ChengfaSum.sum3+"");
                }
            });
            add(jt4);
            add(jb4);
            
        }
    }
    乘法
    package Live;
    
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;
    
    
    
    public class Chu_1 {
        public static void main(String[] args) {
            new NumJframe4();
        }
    }
    
    class ChufaSum {// 定义全局变量(其实就是类变量,因为在JAVA中不存在全局变量的声明,但是类默认是static的,
                    // 所以采用定义类变量的方法)
        public static int sum4 = 0;
    }
    
    class NumJframe4 extends JFrame {
        public NumJframe4() {
            setLayout(null);
            Container con = getContentPane();// 创建一个内容面板容器
            bank1();// 获得题目
            bank2();// 确认答案
            bank3();
            bank4();
            setTitle("100以內的除法测试");
            setBounds(200, 200, 600, 300);// 设置出现位置和窗口大小
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 设置关闭方式
            setVisible(true);// 设置是否展示窗口
            con.setBackground(Color.orange);
        }
        
        void bank1() {// 获得题目按钮区
            JTextField jt = new JTextField();// 文本框1
            jt.setBounds(120, 40, 200, 30);
            JButton jb1 = new JButton();// 按钮1
            jb1.setBounds(20, 40, 100, 30);
            jb1.setText("获得题目");
            jb1.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int jiashu1 = (int) (Math.random() * 100 + 1);
                    int jiashu2 = (int) (Math.random() * 100 + 1);
                    String js1 = "" + jiashu1;
                    String js2 = "" + jiashu2;
                    ChufaSum.sum4 = jiashu1 / jiashu2;
                    jt.setText(js1 + "÷" + js2 + "=" + "");
                }
            });
            add(jt);
            add(jb1);
        }
        
        void bank2() {// 确认答案按钮区
            JTextField jt2 = new JTextField();// 文本框2
            jt2.setBounds(120, 75, 200, 30);
            JButton jb2 = new JButton();// 按钮1
            jb2.setBounds(20, 75, 100, 30);
            jb2.setText("确认答案");
            jb2.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    int sum = ChufaSum.sum4;
                    String inputSum = jt2.getText();
                    
                    //System.out.println("sum="+sum);
                    //System.out.println("inputSum="+inputSum);
                    if(inputSum == null) {
                        System.out.println("你的输入有误,请重新输入一个整数:");
                    }
                    int inputsum = Integer.parseInt(inputSum);
                    if (inputsum == sum) {
                        JOptionPane.showMessageDialog(null,"答案正确","消息对话框",JOptionPane.INFORMATION_MESSAGE);
                    }
    
                    else {
                        JOptionPane.showMessageDialog(null,"答案错误","消息对话框",JOptionPane.WARNING_MESSAGE);
                    }
                }
    
    
    
            });
            add(jt2);
            add(jb2);
        }
        void bank3() {//返回区
              JButton jb3 = new JButton();//
              jb3.setBounds(0, 0, 100, 25);
              jb3.setText("返回");
              jb3.addActionListener(new ActionListener() {
                  public void actionPerformed(ActionEvent e) {
                      setVisible(false);
                      new SizeCaidan();
                  }
              });
          add(jb3);
       }
        
        void bank4() {//输出答案区
            JTextField jt4 = new JTextField();// 文本框1
            jt4.setBounds(120, 110, 200, 30);
            JButton jb4 = new JButton();// 按钮1
            jb4.setBounds(20, 110, 100, 30);
            jb4.setText("揭示答案");
            jb4.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    jt4.setText(ChufaSum.sum4+"");
                }
            });
            add(jt4);
            add(jb4);
            
        }
    }
    除法

    以上即为该四则运算的最终代码版。

    牢骚时间:

    (PS:你看10000遍和她的聊天记录,她不是你的,你看100遍书,知识就是你的,该醒醒了,我们的目标是建设祖国!)

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  • 原文地址:https://www.cnblogs.com/yeluozhiqiumax/p/15345914.html
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