作业5 四则运算 测试与封装 5.1

我这次的结对伙伴是：罗林杰 博客：http://www.cnblogs.com/yihou2ni/

在这次结对任务中，我跟我的结对伙伴各自负责写白盒、黑盒的测试。类的封装是一起合作完成的。

1.第一阶段目标 - 把计算的功能封装成类。

mySize.java

package packageClass;
import java.util.*;
import java.awt.*;

import javax.swing.*;

import java.awt.event.*;
public class mySize extends JFrame implements ActionListener{
    JLabel L1,L2,L3,L4,Feedback,Questions; 
    JTextField inputtext,answertxet; 
    JButton SkinButton,NextBotton,EnterBotton,FactBotton;
    int number,i,n,op,count=0,backcolor=0;
    int d1,d2, d3;
    double result;
    boolean Factorial=false;Core core = new Core();
    public mySize()
    {
        super("四则运算");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400,250);
        this.setLocationRelativeTo(null);
        L1=new JLabel("输入出题数:");
        L2=new JLabel("题目:");
        L3=new JLabel("输入答案:");
        L4=new JLabel("反馈信息:");
        Feedback=new JLabel(" ");
        SkinButton=new JButton("换肤");
        NextBotton=new JButton("下一题");
        EnterBotton=new JButton("提交答案");FactBotton=new JButton("阶乘运算");
        Questions=new JLabel(" ");
        inputtext=new JTextField(10);
        answertxet=new JTextField(10);
        inputtext.addActionListener(this);
        answertxet.addActionListener(this);
        SkinButton.addActionListener(this);
        NextBotton.addActionListener(this);EnterBotton.addActionListener(this);FactBotton.addActionListener(this);
        GridLayout layout=new GridLayout(7,2);
        getContentPane().setLayout(layout);
        getContentPane().setBackground(Color.white);
        L1.setHorizontalAlignment(L1.RIGHT);
        L2.setHorizontalAlignment(L2.RIGHT);
        L3.setHorizontalAlignment(L3.RIGHT);
        L4.setHorizontalAlignment(L4.RIGHT);
        Feedback.setHorizontalAlignment(Feedback.CENTER);
        Questions.setHorizontalAlignment(Feedback.CENTER);
        inputtext.setHorizontalAlignment(inputtext.CENTER);
        add(L1);add(inputtext);
        add(L2);add(Questions);
        add(L3);add(answertxet);
        add(L4);add(Feedback);
        add(EnterBotton);add(NextBotton);add(SkinButton);add(FactBotton);
        setVisible(true);
        setResizable(false);
    }

    public static void main(String[] args)

    {
        mySize frame=new mySize();
    }
    
    public void actionPerformed(ActionEvent e){
        if(e.getSource()==inputtext)
        {
            
            String str=inputtext.getText();Feedback.setText("");
            boolean isAllDigit = true;//定义一个boolean值，用来表示是否包含其他字符
            for(int i=0 ;i<str.length(); i++)//循环遍历字符串   
                if(!Character.isDigit(str.charAt(i))){isAllDigit=false;}//用char包装类中的判断数字的方法判断每一个字符
            if(isAllDigit)
            {
                number=Integer.parseInt(str);
                if(number<6&&number>0)
                {    
                result=core.creatQuestion(Questions,d1,d2,d3,op);
                }
                else
                    Feedback.setText("出题数限制在5以内");
            }
            else
                Feedback.setText("错误！！输入数据含有其他字符!");
        }        
        
        else if(e.getSource()==EnterBotton||e.getSource()==answertxet){
            String str=answertxet.getText();Feedback.setText("");
            
                double a=Double.parseDouble(str);
                if(Factorial==false){
                    if(count<core.CorrectNum(a,result))
                    {
                    count=core.CorrectNum(a,result) ;
                    Feedback.setText("答案正确！请继续做题。");
                    }
                    else
                        Feedback.setText("答错了！正确答案："+String.format("%.2f",result)); 
               }
                else
                {
                if(a==core.Factorial(d1)){Feedback.setText("答案正确!");}
                else
                Feedback.setText("答错了！正确答案为"+core.Factorial(d1));
                Factorial=false;
                }
            
            }
        
        else if(e.getSource()==SkinButton){
            switch(backcolor)
            {
            case 0:this.getContentPane().setBackground(Color.red);break;
            case 1:this.getContentPane().setBackground(Color.black);break;
            case 2:this.getContentPane().setBackground(Color.white);break;
            case 3:this.getContentPane().setBackground(Color.yellow);break;
            case 4:this.getContentPane().setBackground(Color.blue);break;
            case 5:this.getContentPane().setBackground(Color.GREEN);break;
            }
            backcolor++;
            backcolor=backcolor%6;
        }
        else if(e.getSource()==FactBotton){
            d1=(int) (Math.random()*10);
            L2.setText("题目:");Questions.setText(d1+"!");    Factorial=true;inputtext.setText("");answertxet.setText("");Feedback.setText("");
        }
        else if(e.getSource()==NextBotton){
            
            if(number>1)
            {
                number--;
                    result=core.creatQuestion(Questions,d1,d2,d3,op);
                    answertxet.setText("");Feedback.setText("");            
            }
            else
                Feedback.setText("题目已答完，答对"+count+"题");
        }
    }
}

core.java

package packageClass;

import javax.swing.JLabel;
import javax.swing.JTextField;

public class Core {
    static double result=0;
    static int count=0;
    
    public int Factorial(int a)
    {
        int i,sum=1;
        for(i=1;i<=a;i++)
        {
            sum=sum*i;
        }
        return sum;
    }
    
    public double creatQuestion(JLabel Questions,int d1,int d2,int d3,int op) {
            op=(int) (Math.random()*5);
            d1=(int) (Math.random()*200-100);
            d2=(int) (Math.random()*200-100);
            d3=(int) (Math.random()*200-100);
            switch(op)
            {
            case 0:result=(d1+d2*d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
            case 1:result=(d1+(double)d2/d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
            case 2:result=(d1-d2*d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
            case 3:result=(d1-(double)d2/d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
            case 4:result=((d1*d2)/(double)d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
            } return result;
        }
    
    public int CorrectNum(double a,double result) {
                            if(Math.abs(a-result)<0.01){
                                count++;
                                }
                            else
                                {
                                }
                         return count;
    }
    
    
    }

2.设计测试用例：用白盒与黑盒测试设计技术，为计算核心设计测试用例。

 白盒测试：

  一、逻辑覆盖法

黑盒测试：

1.验证阶乘，四则运算等功能的正确性及容错功能

3.在实验环境中（如MyEclipse集成开发环境+Junit测试框架）运行测试用例，分析测试结果，找出程序问题，给出改进前后的代码对照。

测试用例：

package packageClass;

import static org.junit.Assert.*;

import javax.swing.JLabel;

import org.junit.Before;
import org.junit.Test;

public class CoreTest {
    private static Core calculate = new Core();
    @Before
    public void setUp() throws Exception {
        
    }

    @Test
    public void testFactorial() {
         assertEquals(2, calculate.Factorial(2));//验证阶乘的正确性
    }

    @Test
    public void testCreatQuestion() {
        

        assertEquals(21, (int)calculate.creatQuestion(3, 4, 5, 0));

    }

    @Test
    public void testCorrectNum() {
        assertEquals(1,calculate.CorrectNum(7, 7));
    }

}

程序修改前：

import java.util.*;
import java.math.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class SiZi extends JFrame implements ActionListener{
    JLabel L1,L2,L3,L4,L5,Ltimu;
    JTextField inputtext,answertxet;
    JButton B1,B2,B3,B4;
    int number,i,n,op,tid=1,count=0,backcolor=0,jieflag=0;
    int d1,d2, d3;
    public SiZi()
    {
        super("四则运算");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400,250);
        this.setLocationRelativeTo(null);
        L1=new JLabel("输入出题数:");
        L2=new JLabel("题目:");
        L3=new JLabel("输入答案:");
        L4=new JLabel("反馈信息:");
        L5=new JLabel(" ");
        B1=new JButton("换肤");
        B2=new JButton("下一题");
        B3=new JButton("提交答案");B4=new JButton("阶乘运算");
        Ltimu=new JLabel(" ");
        inputtext=new JTextField(10);
        answertxet=new JTextField(10);
        inputtext.addActionListener(this);
        answertxet.addActionListener(this);
        B1.addActionListener(this);
        B2.addActionListener(this);B3.addActionListener(this);B4.addActionListener(this);
        GridLayout layout=new GridLayout(7,2);
        getContentPane().setLayout(layout);
        getContentPane().setBackground(Color.white);
        L1.setHorizontalAlignment(L1.RIGHT);
        L2.setHorizontalAlignment(L2.RIGHT);
        L3.setHorizontalAlignment(L3.RIGHT);
        L4.setHorizontalAlignment(L4.RIGHT);
        L5.setHorizontalAlignment(L5.CENTER);
        Ltimu.setHorizontalAlignment(L5.CENTER);
        inputtext.setHorizontalAlignment(inputtext.CENTER);
        add(L1);add(inputtext);
        add(L2);add(Ltimu);
        add(L3);add(answertxet);
        add(L4);add(L5);
        add(B3);add(B2);add(B1);add(B4);
        setVisible(true);
        setResizable(false);
    }
    
    public static void main(String[] args)

    {
        SiZi frame=new SiZi();
    }
    

    public void actionPerformed(ActionEvent e){
        if(e.getSource()==inputtext)
        {
            String str=inputtext.getText();L5.setText("");
            boolean isAllLetter = true;//定义一个boolean值，用来表示是否不含包含数字
            for(int i=0 ; i<str.length() ; i++)//循环遍历字符串   
                if(!Character.isDigit(str.charAt(i))){   //用char包装类中的判断数字的方法判断每一个字符
                    isAllLetter = false;
                }
            if(isAllLetter){
                number=Integer.parseInt(str);n=number;
                if(number>0&&number<6)
                {
                    op=(int) (Math.random()*5);
                    d1=(int) (Math.random()*200-100);
                    d2=(int) (Math.random()*200-100);
                    d3=(int) (Math.random()*200-100);
                    switch(op)
                    {
                    case 0:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
                    case 1:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
                    case 2:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
                    case 3:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
                    case 4:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
                        }    
                    tid=1;count=0;
                    L2.setText("题目"+tid+": ");
                    }
                else
                L5.setText("出题数限制在5以内");
                }
            else
                L5.setText("错误！！输入数据含有其他字符!");
            }
        
        else if(e.getSource()==B3||e.getSource()==answertxet){
            String str=answertxet.getText();L5.setText("");
            boolean isAllLetter = true;//定义一个boolean值，用来表示是否不含包含数字
            for(int i=0 ; i<str.length() ; i++)//循环遍历字符串   
                if(!Character.isDigit(str.charAt(i))){   //用char包装类中的判断数字的方法判断每一个字符
                    isAllLetter = false;
                }
            if(isAllLetter){
            double a=Double.parseDouble(str);
            if(jieflag==0){
                switch(op)
                {
                case 0:
                    if(d1+(d2*d3)==a){
                        L5.setText("答案正确！请继续做题。");
                        count++;
                        }
                    else{
                        L5.setText("答错了！正确答案："+(d1+d2*d3));
                        };break;
                        case 1:
                            if(Math.abs(a-((d1+d2)/(double)d3))<0.01){
                                L5.setText("答案正确！请继续做题。");
                                count++;
                                }
                            else{
                                L5.setText("答错了！正确答案为："+String.format("%.2f", (d1+(double)d2/d3))); 
                                };break;
                                case 2:
                                    if((d1-(d2*d3))==a){
                                        L5.setText("答案正确！请继续做题。");
                                        count++;
                                        }
                                    else{
                                        L5.setText("答错了！正确答案为："+(d1-d2*d3));
                                        };break;
                                        case 3:
                                            if(Math.abs(a-((d1-d2)/(double)d3))<0.01){
                                                L5.setText("答案正确！请继续做题。");
                                                count++;
                                                }
                                            else{
                                                L5.setText("答错了！正确答案为："+String.format("%.2f", (d1-(double)d2/d3)));
                                                };break;
                                                case 4:
                                                    if(Math.abs(a-((d1*d2)/(double)d3))<0.01){
                                                        L5.setText("答案正确！请继续做题。");
                                                        count++;
                                                        }
                                                    else{
                                                        L5.setText("答错了！正确答案为："+String.format("%.2f", (d1*(double)d2/d3)));
                                                        };break;
                                                        }
                }
            else
            {
                int i,sum=1;
                for(i=1;i<=d1;i++){
                    sum=sum*i;
                }
                if(a==sum){L5.setText("答案正确!");}
                else
                L5.setText("答错了！正确答案为"+sum);
                jieflag=0;
            }
        }
        else
            L5.setText("错误！！输入数据含有其他字符!");}
        
        
        else if(e.getSource()==B1){
            switch(backcolor)
            {
            case 0:this.getContentPane().setBackground(Color.red);break;
            case 1:this.getContentPane().setBackground(Color.black);break;
            case 2:this.getContentPane().setBackground(Color.white);break;
            case 3:this.getContentPane().setBackground(Color.yellow);break;
            case 4:this.getContentPane().setBackground(Color.blue);break;
            case 5:this.getContentPane().setBackground(Color.GREEN);break;
            }
            backcolor++;
            backcolor=backcolor%6;
        }
        else if(e.getSource()==B4){
            d1=(int) (Math.random()*10);
            L2.setText("题目:");Ltimu.setText(d1+"!");    jieflag=1;inputtext.setText("");answertxet.setText("");L5.setText("");
        }
        else if(e.getSource()==B2){
            
            if(n>1)
            {
                n--;
                    op=(int) (Math.random()*5);
                    d1=(int) (Math.random()*200)-100;
                    d2=(int) (Math.random()*200)-100;
                    d3=(int) (Math.random()*200)-100;
                    switch(op)
                     {
                    case 0:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
                    case 1:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
                    case 2:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
                    case 3:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
                    case 4:
                        if(d2<0&&d3<0)Ltimu.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                        else if (d2>0&&d3>0)Ltimu.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                        else if (d2<0&&d3>0)Ltimu.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
                     }
                    tid++;
                    L2.setText("题目"+tid+": ");
                    answertxet.setText("");L5.setText("");            
            }
            else
                L5.setText("题目已答完，答对"+count+"题,答错"+(number-count)+"题");
        }
    }
}

程序修改后： 

package packageClass;
import java.util.*;
import java.awt.*;

import javax.swing.*;

import java.awt.event.*;
public class mySize extends JFrame implements ActionListener{
    JLabel L1,L2,L3,L4,Feedback,Questions; 
    JTextField inputtext,answertxet; 
    JButton SkinButton,NextBotton,EnterBotton,FactBotton;
    int number,i,n,op,tid=1,count=0,backcolor=0;
    int d1,d2, d3;
    double result;
    boolean Factorial=false;Core core = new Core();
    public mySize()
    {
        super("四则运算");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400,250);
        this.setLocationRelativeTo(null);
        L1=new JLabel("输入出题数:");
        L2=new JLabel("题目:");
        L3=new JLabel("输入答案:");
        L4=new JLabel("反馈信息:");
        Feedback=new JLabel(" ");
        SkinButton=new JButton("换肤");
        NextBotton=new JButton("下一题");
        EnterBotton=new JButton("提交答案");FactBotton=new JButton("阶乘运算");
        Questions=new JLabel(" ");
        inputtext=new JTextField(10);
        answertxet=new JTextField(10);
        inputtext.addActionListener(this);
        answertxet.addActionListener(this);
        SkinButton.addActionListener(this);
        NextBotton.addActionListener(this);EnterBotton.addActionListener(this);FactBotton.addActionListener(this);
        GridLayout layout=new GridLayout(7,2);
        getContentPane().setLayout(layout);
        getContentPane().setBackground(Color.white);
        L1.setHorizontalAlignment(L1.RIGHT);
        L2.setHorizontalAlignment(L2.RIGHT);
        L3.setHorizontalAlignment(L3.RIGHT);
        L4.setHorizontalAlignment(L4.RIGHT);
        Feedback.setHorizontalAlignment(Feedback.CENTER);
        Questions.setHorizontalAlignment(Feedback.CENTER);
        inputtext.setHorizontalAlignment(inputtext.CENTER);
        add(L1);add(inputtext);
        add(L2);add(Questions);
        add(L3);add(answertxet);
        add(L4);add(Feedback);
        add(EnterBotton);add(NextBotton);add(SkinButton);add(FactBotton);
        setVisible(true);
        setResizable(false);
    }

    public static void main(String[] args)

    {
        mySize frame=new mySize();
    }
    
    public void actionPerformed(ActionEvent e){
        if(e.getSource()==inputtext)
        {
            
            String str=inputtext.getText();Feedback.setText("");
            boolean isAllDigit = true;//定义一个boolean值，用来表示是否包含其他字符
            for(int i=0 ;i<str.length(); i++)//循环遍历字符串   
                if(!Character.isDigit(str.charAt(i))){isAllDigit=false;}//用char包装类中的判断数字的方法判断每一个字符
            if(isAllDigit)
            {
                number=Integer.parseInt(str);
                if(number<6&&number>0)
                {    
                result=core.creatQuestion(Questions,d1,d2,d3,op);
                }
                else
                    Feedback.setText("出题数限制在5以内");
            }
            else
                Feedback.setText("错误！！输入数据含有其他字符!");
        }        
        
        else if(e.getSource()==EnterBotton||e.getSource()==answertxet){
            String str=answertxet.getText();Feedback.setText("");
            
                double a=Double.parseDouble(str);
                if(Factorial==false){
                    count=core.CorrectNum(a,result,Feedback) ;
               }
                else
                {
                if(a==core.Factorial(d1)){Feedback.setText("答案正确!");}
                else
                Feedback.setText("答错了！正确答案为"+core.Factorial(d1));
                Factorial=false;
                }
            
            }
        
        else if(e.getSource()==SkinButton){
            switch(backcolor)
            {
            case 0:this.getContentPane().setBackground(Color.red);break;
            case 1:this.getContentPane().setBackground(Color.black);break;
            case 2:this.getContentPane().setBackground(Color.white);break;
            case 3:this.getContentPane().setBackground(Color.yellow);break;
            case 4:this.getContentPane().setBackground(Color.blue);break;
            case 5:this.getContentPane().setBackground(Color.GREEN);break;
            }
            backcolor++;
            backcolor=backcolor%6;
        }
        else if(e.getSource()==FactBotton){
            d1=(int) (Math.random()*10);
            L2.setText("题目:");Questions.setText(d1+"!");    Factorial=true;inputtext.setText("");answertxet.setText("");Feedback.setText("");
        }
        else if(e.getSource()==NextBotton){
            
            if(number>1)
            {
                number--;
                    result=core.creatQuestion(Questions,d1,d2,d3,op);
                    answertxet.setText("");Feedback.setText("");            
            }
            else
                Feedback.setText("题目已答完，答对"+count+"题");
        }
    }
}

package packageClass;

import javax.swing.JLabel;
import javax.swing.JTextField;

public class Core {
    static double result=0;
    static int count=0;
    
    public int Factorial(int a)
    {
        int i,sum=1;
        for(i=1;i<=a;i++)
        {
            sum=sum*i;
        }
        return sum;
    }
    
    public double creatQuestion(JLabel Questions,int d1,int d2,int d3,int op) {
            op=(int) (Math.random()*5);
            d1=(int) (Math.random()*200-100);
            d2=(int) (Math.random()*200-100);
            d3=(int) (Math.random()*200-100);
            switch(op)
            {
            case 0:result=(d1+d2*d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
            case 1:result=(d1+(double)d2/d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"+"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
            case 2:result=(d1-d2*d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")×"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"×("+String.valueOf(d3)+")=");break;
            case 3:result=(d1-(double)d2/d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"-"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
            case 4:result=((d1*d2)/(double)d3);
                if(d2<0&&d3<0)Questions.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷("+String.valueOf(d3)+")=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"×("+String.valueOf(d2)+")÷"+String.valueOf(d3)+"=");
                else if (d2>0&&d3>0)Questions.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷"+String.valueOf(d3)+"=");
                else if (d2<0&&d3>0)Questions.setText(String.valueOf(d1)+"×"+String.valueOf(d2)+"÷("+String.valueOf(d3)+")=");break;
            } return result;
        }
    
    public int CorrectNum(double a,double result,JLabel Feedback) {
        
                            if(Math.abs(a-result)<0.01){
                                Feedback.setText("答案正确！请继续做题。");
                                count++;
                                }
                            else
                                Feedback.setText("答错了！正确答案："+String.format("%.2f",result)); 
                         return count;
    }
    
    
    }