使用java图形用户界面 并实现两个随机生成数的加减运算的结果与输入的数判断是否相等

随机生成两个10以内的随机数并得到这两个随机数的运算结果（这里指的运算是指加减运算）,在输入框输入一个数 和 前面的两个随机数的运算结果进行判断是否相等，如果相等，在java图形用户界面 实现的窗口显示正确

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import javax.swing.*;

public class MainWindow extends JFrame {

    private MyPanel contentPane = new MyPanel();

    public static void main(String[] args) {
        new MainWindow();
    }

    public MainWindow() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 400, 300);
        setVisible(true);
        add(contentPane);

    }

}

/**
 * 用于生成随机数 和 生成两个随机数的和 和 输入的数比较
 */
public class ManagerNumber {
   Number number = new Number();
     static int result ;

    public ManagerNumber() {
        generateResult();
    }


    public  int generateResult() {

        number.setN1( (int) ((Math.random() * 10) + 1) );//1~10的随机整数
        number.setN2((int) ((Math.random() * 10) + 1));

        int temp = (int) ((Math.random() * 2));

        //随机生成0/1 ,如果0 ，则是+ ，如果 1 则是 -
        if (temp == 0) {
            number.setSign("+");
            result = number.getN1() + number.getN2();
        }
        if (temp == 1) {
            number.setSign("-");
            result = number.getN1() - number.getN2();
        }

        return result;

    }

    public Number getNumber(){
        return number;
    }

    //判断 inputNumber和targetNumber是否相等
    public static boolean IsEqual(String inputNumber){
        return inputNumber.equals(result+"");
    }

    //获取两个随机数的运算结果
    public static int getResult(){
        return result;
    }

}

public class Number {

    private int n1;//随机数
    private int n2;//随机数
    private String sign;// + / - 符号

    public Number() {

    }

    public int getN1() {
        return n1;
    }

    public void setN1(int n1) {
        this.n1 = n1;
    }

    public int getN2() {
        return n2;
    }

    public void setN2(int n2) {
        this.n2 = n2;
    }

    public String getSign() {
        return sign;
    }

    public void setSign(String sign) {
        this.sign = sign;
    }


}

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;


public class MyPanel extends JPanel {
    private JTextField txfInput1;
    private ManagerNumber managerNumber = new ManagerNumber();
    private Number number = managerNumber.getNumber();
    private String info = " ";

    private JLabel lblMessage1;
    private JLabel lblMessage2;
    private JLabel lblMessage3;
    private JLabel lblMessage5;

    public MyPanel() {
        setBorder(new EmptyBorder(5, 5, 5, 5));
//        setBounds(5,5,100,200);
        setLayout(null);

        //输入框的内容，用于和计算结果匹配
        inputBox();

        //初始显示生成随机数以及运算符号
        genN1AndN2Sign(number.getN1(), number.getN2(), number.getSign());

        JLabel lblMessage4 = new JLabel("=");
        lblMessage4.setBounds(160, 40, 100, 20);
        add(lblMessage4);

//     lblMessage5 用于显示提示信息（如果正确，给出 表扬 ，错误，给出提示信息 和 正确答案）
        genLabel();


        JButton btnCalculate = new JButton("计算");
        //给计算按钮添加一个监听器
        btnCalculate.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                //获取文本输入框的输入的内容
                String text = txfInput1.getText();
                //判断输入的是否和两个随机数运算的结果是否相等
                boolean b = ManagerNumber.IsEqual(text);
                //根据b来设置提示信息
                if (b) {
                    info = "正确";
                    genLabel();
                }
                if (!b) {
                    info = "错误,正确答案是" + ManagerNumber.getResult();
                    genLabel();
                }

                //重绘
                repaint();
            }
        });
        btnCalculate.setBounds(100, 80, 80, 20);
        add(btnCalculate);


        JButton btnNext = new JButton("下一题");
        //给下一题按钮添加监听器
        btnNext.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                //当鼠标点击‘下一题按钮’
                //生成两个随机数和运算符号，并返回运算结果
                int i = managerNumber.generateResult();
                Number number = managerNumber.getNumber();
                //将随机数置于面板随机数对应的JLabel
                genN1AndN2Sign(number.getN1(), number.getN2(), number.getSign());
                //置空文本输入框
                inputBox();
                //将info置为“”
                info = "";
                genLabel();
                //重绘
                repaint();
            }
        });
        btnNext.setBounds(100, 120, 80, 20);
        add(btnNext);
    }


    //生成提示信息标签
    public void genLabel() {

        if (!(lblMessage5 == null)) {
            remove(lblMessage5);
        }

        lblMessage5 = new JLabel(info);
        lblMessage5.setFont(new Font("微软雅黑",Font.BOLD,15));
        lblMessage5.setBounds(230, 100, 200, 20);
        add(lblMessage5);
    }


    //方法：实现将随机数以及运算符号 置于 面板中随机数和运算符号对应的JLabel
    public void genN1AndN2Sign(int n1, int n2, String sign) {

        //先清空上一次JLabel的内容
        if (!(lblMessage1 == null && lblMessage2 == null && lblMessage3 == null)) {
            remove(lblMessage1);
            remove(lblMessage2);
            remove(lblMessage3);
        }

        lblMessage1 = new JLabel(n1 + "");
        lblMessage1.setFont(new Font("微软雅黑",Font.BOLD,15));
        lblMessage1.setBounds(100, 40, 100, 20);
        add(lblMessage1);

        lblMessage2 = new JLabel(sign);
        lblMessage2.setFont(new Font("微软雅黑",Font.BOLD,20));
        lblMessage2.setBounds(120, 40, 100, 20);
        add(lblMessage2);

        lblMessage3 = new JLabel(n2 + "");
        lblMessage3.setFont(new Font("微软雅黑",Font.BOLD,15));
        lblMessage3.setBounds(140, 40, 100, 20);
        add(lblMessage3);
    }


    //方法：置空文本输入框并绘制新文本输入框
    public void inputBox() {
        if (!(txfInput1 == null)) {
            remove(txfInput1);
        }

        txfInput1 = new JTextField();
        txfInput1.setBounds(180, 40, 70, 20);
        txfInput1.setFont(new Font("微软雅黑",Font.BOLD,15));
        add(txfInput1);
        txfInput1.setColumns(10);

    }

}