Java 算数测试小程序

TestFrame.java

1. import javax.swing.*;  
2. import java.awt.FlowLayout;  
3. import java.awt.event.*;   
4.  
5. public class TestFrame extends JFrame implements ActionListener   
6. {   
7.        JTextField textOne,textTwo,textResult;   
8.        JButton getProblem,giveAnwser;   
9.        JLabel operatorJLabel,message;   
10.        TestOperator testOperator;   
11.  
12.        public TestFrame()   
13.        {   
14.             testOperator=new TestOperator();   
15.             setLayout(new FlowLayout());   
16.             textOne=new JTextField(10); //创建textOne,其可见字符长是10   
17.             textTwo=new JTextField(10); //创建textTwo,其可见字符长是10   
18.             textResult=new JTextField(10); //创建textResult,其可见字符长是10   
19.             operatorJLabel=new JLabel("+");   
20.             message=new JLabel("你还没有回答呢");   
21.             getProblem=new JButton("获取题目");   
22.             giveAnwser=new JButton("确认答案");   
23.  
24.             add(getProblem);   
25.             add(textOne);   
26.             add(operatorJLabel);   
27.             add(textTwo);   
28.             add(new JLabel("="));   
29.             add(textResult);   
30.             add(giveAnwser);   
31.             add(message);   
32.  
33.             textOne.setEditable(false);   
34.             textTwo.setEditable(false);   
35.             getProblem.addActionListener(this);//当前窗口注册为getProblem的ActionEvent事件监视器   
36.             giveAnwser.addActionListener(this);//当前窗口注册为giveAnwser的ActionEvent事件监视器   
37.             textResult.addActionListener(this);//当前窗口注册为textResult的ActionEvent事件监视器   
38.        }   
39.        public void actionPerformed(ActionEvent e)   
40.       {   
41.            if(e.getSource()==getProblem) //判断事件源是否是getProblem   
42.           {   
43.             int number1=testOperator.giveNumberOne(100);              
44.             int number2=testOperator.giveNumberTwo(100);              
45.             String operator=testOperator.giveOperator();               
46.             textOne.setText(""+number1);               
47.             textTwo.setText(""+number2);               
48.             operatorJLabel.setText(operator);               
49.             message.setText("请回答");              
50.             textResult.setText(null);   
51.           }   
52.          if(e.getSource()==giveAnwser) //判断事件源是否是giveAnwser   
53.          {   
54.              String answer=textResult.getText();   
55.              
56.             try{ int result=Integer.parseInt(answer);   
57.                   
58.                 if(testOperator.getRight(result)==true)  
59.                 {   
60.                     message.setText("你回答正确");   
61.                 }   
62.                 else   
63.                 {   
64.                     message.setText("你回答错误");   
65.                 }   
66.               }   
67.             catch(NumberFormatException ex)   
68.                {   
69.                     message.setText("请输入数字字符");   
70.                }   
71.           }   
72.     }   
73. }  

TestOperator.java

1. public class TestOperator   
2. {   
3.      int numberOne,numberTwo;   
4.      String operator="";   
5.      boolean right;   
6.  
7.      //随机生成第一个数  
8.      public int giveNumberOne(int n)   
9.      {   
10.          numberOne=(int)(Math.random()*n)+1; //强制转换为int型  
11.                                              //因为Math.random()返回的为double型  
12.          return numberOne;   
13.      }   
14.  
15.     //随机生成第二个数  
16.      public int giveNumberTwo(int n)   
17.      {   
18.          numberTwo=(int)(Math.random()*n)+1;   
19.          return numberTwo;   
20.       }   
21.  
22.      //随机生成运算符号  
23.       public String giveOperator()   
24.       {  
25.          double d=Math.random();   
26.          if(d>=0&&d<0.25)   
27.             operator="+";   
28.  
29.          else if(d>0.25&&d<=0.5)  
30.              operator="-";   
31.            
32.          else if(d>0.5&&d<=0.75)           
33.              operator="*";   
34.            
35.          else               
36.              operator="/";   
37.            
38.          return operator;   
39.       }   
40.  
41.       //判断测试结果是否正确  
42.       public boolean getRight(int answer)   
43.       {   
44.           if(operator.equals("+"))   
45.           {  
46.                if(answer==numberOne+numberTwo)   
47.                   right=true;   
48.  
49.                else   
50.                   right=false;   
51.  
52.            }   
53.  
54.            else if(operator.equals("-"))   
55.           {   
56.                if(answer==numberOne-numberTwo)   
57.                   right=true;   
58.  
59.                else   
60.                    right=false;   
61.            }   
62.             
63.            else if(operator.equals("*"))   
64.            {   
65.                if(answer==numberOne*numberTwo)   
66.                   right=true;   
67.  
68.                 else   
69.                    right=false;   
70.             }   
71.            else if(operator.equals("/"))   
72.            {   
73.                if(answer==numberOne/numberTwo)   
74.                   right=true;   
75.  
76.                 else   
77.                    right=false;   
78.             }   
79.    return right;   
80.   }   
81. }   

MainClass.java

1. import javax.swing.JFrame;  
2. import javax.swing.UIManager;  
3.  
4. public class MainClass   
5. {      
6.        public static void main(String args[])   
7.        {      
8.            try {  
9.                  UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); //windows界面风格  
10.             } catch (Exception e) {  
11.                 e.printStackTrace();  
12.             }  
13.            TestFrame frame=new TestFrame();  
14.            frame.setTitle("算数测试小程序");             
15.            frame.setBounds(100,100,500,100);   
16.            frame.setVisible(true);   
17.            frame.setLocationRelativeTo(null);//窗体居中显示  
18.            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
19.            frame.setResizable(false);  
20.        }   
21. }  

效果图：

本文转自 lingdududu 51CTO博客，原文链接：http://blog.51cto.com/liangruijun/628339