Java 算数测试小程序

TestFrame.java

import javax.swing.*;  
import java.awt.FlowLayout;  
import java.awt.event.*;   
 
public class TestFrame extends JFrame implements ActionListener   
{   
       JTextField textOne,textTwo,textResult;   
       JButton getProblem,giveAnwser;   
       JLabel operatorJLabel,message;   
       TestOperator testOperator;   
 
       public TestFrame()   
       {   
            testOperator=new TestOperator();   
            setLayout(new FlowLayout());   
            textOne=new JTextField(10); //创建textOne,其可见字符长是10   
            textTwo=new JTextField(10); //创建textTwo,其可见字符长是10   
            textResult=new JTextField(10); //创建textResult,其可见字符长是10   
            operatorJLabel=new JLabel("+");   
            message=new JLabel("你还没有回答呢");   
            getProblem=new JButton("获取题目");   
            giveAnwser=new JButton("确认答案");   
 
            add(getProblem);   
            add(textOne);   
            add(operatorJLabel);   
            add(textTwo);   
            add(new JLabel("="));   
            add(textResult);   
            add(giveAnwser);   
            add(message);   
 
            textOne.setEditable(false);   
            textTwo.setEditable(false);   
            getProblem.addActionListener(this);//当前窗口注册为getProblem的ActionEvent事件监视器   
            giveAnwser.addActionListener(this);//当前窗口注册为giveAnwser的ActionEvent事件监视器   
            textResult.addActionListener(this);//当前窗口注册为textResult的ActionEvent事件监视器   
       }   
       public void actionPerformed(ActionEvent e)   
      {   
           if(e.getSource()==getProblem) //判断事件源是否是getProblem   
          {   
            int number1=testOperator.giveNumberOne(100);              
            int number2=testOperator.giveNumberTwo(100);              
            String operator=testOperator.giveOperator();               
            textOne.setText(""+number1);               
            textTwo.setText(""+number2);               
            operatorJLabel.setText(operator);               
            message.setText("请回答");              
            textResult.setText(null);   
          }   
         if(e.getSource()==giveAnwser) //判断事件源是否是giveAnwser   
         {   
             String answer=textResult.getText();   
             
            try{ int result=Integer.parseInt(answer);   
                  
                if(testOperator.getRight(result)==true)  
                {   
                    message.setText("你回答正确");   
                }   
                else   
                {   
                    message.setText("你回答错误");   
                }   
              }   
            catch(NumberFormatException ex)   
               {   
                    message.setText("请输入数字字符");   
               }   
          }   
    }   
}  

TestOperator.java

public class TestOperator   
{   
     int numberOne,numberTwo;   
     String operator="";   
     boolean right;   
 
     //随机生成第一个数  
     public int giveNumberOne(int n)   
     {   
         numberOne=(int)(Math.random()*n)+1; //强制转换为int型  
                                             //因为Math.random()返回的为double型  
         return numberOne;   
     }   
 
    //随机生成第二个数  
     public int giveNumberTwo(int n)   
     {   
         numberTwo=(int)(Math.random()*n)+1;   
         return numberTwo;   
      }   
 
     //随机生成运算符号  
      public String giveOperator()   
      {  
         double d=Math.random();   
         if(d>=0&&d<0.25)   
            operator="+";   
 
         else if(d>0.25&&d<=0.5)  
             operator="-";   
           
         else if(d>0.5&&d<=0.75)           
             operator="*";   
           
         else               
             operator="/";   
           
         return operator;   
      }   
 
      //判断测试结果是否正确  
      public boolean getRight(int answer)   
      {   
          if(operator.equals("+"))   
          {  
               if(answer==numberOne+numberTwo)   
                  right=true;   
 
               else   
                  right=false;   
 
           }   
 
           else if(operator.equals("-"))   
          {   
               if(answer==numberOne-numberTwo)   
                  right=true;   
 
               else   
                   right=false;   
           }   
            
           else if(operator.equals("*"))   
           {   
               if(answer==numberOne*numberTwo)   
                  right=true;   
 
                else   
                   right=false;   
            }   
           else if(operator.equals("/"))   
           {   
               if(answer==numberOne/numberTwo)   
                  right=true;   
 
                else   
                   right=false;   
            }   
   return right;   
  }   
}   

MainClass.java

import javax.swing.JFrame;  
import javax.swing.UIManager;  
 
public class MainClass   
{      
       public static void main(String args[])   
       {      
           try {  
                 UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); //windows界面风格  
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
           TestFrame frame=new TestFrame();  
           frame.setTitle("算数测试小程序");             
           frame.setBounds(100,100,500,100);   
           frame.setVisible(true);   
           frame.setLocationRelativeTo(null);//窗体居中显示  
           frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
           frame.setResizable(false);  
       }   
}  

效果图：

本文出自 “IT的点点滴滴” 博客，请务必保留此出处http://liangruijun.blog.51cto.com/3061169/628339