public class Teacher
{
int numberOne,numberTwo;
String operator="";
boolean right;
public int giveNumberOne(int n)
{
numberOne=(int)(Math.random()*n)+1;
return numberOne;
}
public int giveNumberTwo(int n)
{
numberTwo=(int)(Math.random()*n)+1;
return numberTwo;
}
public String giveOperator()
{
double d=Math.random();
if(d>=0.5)
operator="+";
else
operator="-";
return operator;
}
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;
}
return right;
}
}
ComputerFrame.java
import java.awt.*;
import java.awt.event.*;
public class ComputerFrame extends Frame implements ActionListener
{
TextField textOne,textTwo,textResult;
Button getProblem,giveAnwser;
Label operatorLabel,message;
Teacher teacher;
ComputerFrame(String s)
{
super(s);
teacher=new Teacher();
setLayout(new FlowLayout());
textOne=new TextField(10) ; //创建textOne,其可见字符长是10
textTwo=new TextField(10) ; //创建textTwo,其可见字符长是10
textResult=new TextField(10) ; //创建textResult,其可见字符长是10
operatorLabel=new Label("+");
message=new Label("你还没有回答呢");
getProblem=new Button("获取题目");
giveAnwser=new Button("确认答案");
add(getProblem);
add(textOne);
add(operatorLabel);
add(textTwo);
add(new Label("="));
add(textResult);
add(giveAnwser);
add(message);
textResult.requestFocus();
textOne.setEditable(false);
textTwo.setEditable(false);
getProblem.addActionListener(this);//将当前窗口注册为getProblem的ActionEvent事件监视器
giveAnwser.addActionListener(this);//将当前窗口注册为giveAnwser的ActionEvent事件监视器
textResult.addActionListener(this);//将当前窗口注册为textResult的ActionEvent事件监视器
setBounds(100,100,450,100);
setVisible(true);
validate();
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==getProblem) //判断事件源是否是getProblem
{
int number1=teacher.giveNumberOne(100);
int number2=teacher.giveNumberTwo(100);
String operator=teacher.givetOperator();
textOne.setText(""+number1);
textTwo.setText(""+number2);
operatorLabel.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(teacher.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");
}
}
textResult.requestFocus();
validate();
}
}
MainClass.java
public class MainClass
{
public static void main(String args[])
{
ComputerFrame frame;
frame=new WindowText("算术测试");//创建窗口，其标题为：算术测试
}
}
下面是错误提示
--------------------Configuration: <Default>--------------------
H:\Teacher.java:44: 需要为 class、interface 或 enum
ComputerFrame.java
^
H:\Teacher.java:46: 需要为 class、interface 或 enum
import java.awt.event.*;
^
H:\Teacher.java:126: 需要为 class、interface 或 enum
MainClass.java
^
3 错误
Process completed.
哪位高手来帮帮我啊