软件工程——四则运算升级作业

package mainClass;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util. Random;
public class MainClass {
public static void main (String args[]) {
ComputerFrame frame;
frame=new ComputerFrame();
frame.setTitle("算数测试");
frame.setBounds (100,100, 650, 180);
}
}
class ComputerFrame extends JFrame{
JMenuBar menubar;
JMenu choiceGrade;
JMenuItem grade1,grade2;
JTextField textOne,textTwo,textResult;
JButton getProblem,giveAnwser;
JLabel operatorLabel,message;
Teacher teacherZhang;
ComputerFrame (){
teacherZhang=new Teacher () ;
teacherZhang.setMaxInteger (20) ;
setLayout (new FlowLayout () ) ;
menubar=new JMenuBar () ;
choiceGrade=new JMenu("选择级别");
grade1=new JMenuItem("幼儿级别");
grade2=new JMenuItem("儿童级别");
grade1.addActionListener (new ActionListener () {
public void actionPerformed (ActionEvent e) {
teacherZhang.setMaxInteger (10) ;
}
});
grade2.addActionListener (new ActionListener () {
public void actionPerformed (ActionEvent e) {
teacherZhang.setMaxInteger (50) ;
}
});
choiceGrade.add (grade1) ;
choiceGrade.add (grade2) ;
menubar.add (choiceGrade);
setJMenuBar (menubar) ;
textOne=new JTextField(5);
textTwo=new JTextField (5) ;
textResult=new JTextField (5) ;
operatorLabel=new JLabel ("+") ;
operatorLabel.setFont (new Font ("Arial", Font. BOLD, 20) ) ;
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 (operatorLabel) ;
add (textTwo) ;
add (new JLabel ("=") ) ;
add (textResult) ;
add (giveAnwser) ;
add (message) ;
textResult.requestFocus () ;
textOne.setEditable (false) ;
textTwo.setEditable (false) ;
getProblem.setActionCommand ("getProblem") ;
textResult.setActionCommand ("answer") ;
giveAnwser.setActionCommand ("answer") ;
teacherZhang.setJTextField (textOne,textTwo,textResult) ;
teacherZhang.setJLabel (operatorLabel,message);
getProblem.addActionListener(teacherZhang);
giveAnwser.addActionListener(teacherZhang);
textResult.addActionListener(teacherZhang);
setVisible (true) ;
validate ();
setDefaultCloseOperation (DISPOSE_ON_CLOSE) ;
}
}

class Teacher implements ActionListener{
int numberOne,numberTwo;
String operator="";
boolean isRight;
Random random;
int maxInteger;
JTextField textOne,textTwo,textResult;
JLabel operatorLabel,message;
Teacher (){
random = new Random () ;
}
public void setMaxInteger (int n) {
maxInteger=n;
}
public void actionPerformed (ActionEvent e) {
String str=e.getActionCommand () ;
if (str.equals ("getProblem") ) {
numberOne =random.nextInt(maxInteger)+1;
numberTwo=random.nextInt (maxInteger) +1;
double d=Math.random () ;
if (d>=0.5) {
operator="+";
if(d>=0.5&&d<0.8){
operator="-";
}
}
else if(d>=0.3&&d<0.5) {
operator="*";
}
else
operator="/";
textOne.setText (""+numberOne) ;
textTwo.setText (""+numberTwo) ;
operatorLabel.setText (operator) ;
message.setText("请回答");
textResult.setText (null) ;
}
else if (str.equals ("answer") ) {
String answer=textResult.getText () ;
try{
int result=Integer.parseInt (answer) ;
if (operator.equals ("+") ) {
if (result==numberOne+numberTwo)
message.setText("你回答正确");
else
message.setText("你回答错误");
}
if (operator.equals ("-") ) {
if (result==numberOne-numberTwo)
message.setText("你回答正确");
else
message.setText("你回答错误");
}
if (operator.equals ("/") ) {
if (result==numberOne/numberTwo)
message.setText("你回答正确");
else
message.setText("你回答错误");
}
else if (operator.equals ("*") ) {
if (result==numberOne*numberTwo)
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");
}
}
}
public void setJTextField (JTextField...t) {
textOne=t [0] ;
textTwo=t [1] ;
textResult=t[2];
}
public void setJLabel (JLabel...label) {
operatorLabel=label [0] ;
message=label [1] ;
}
}