day79(异常三)

import  java.awt.*;

import  java.awt.event.*;

import javax.swing.*;

import java.io.*;

public class ExceptTest{

public static void main(String[] args){

 ExceptTestFrame frame=new ExceptTestFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}

class ExceptTestFrame extends JFrame{

public ExceptTestFrame(){

setTitle("ExceptTest");

ExceptTestPane1 pane1=new ExceptTestPane1();

add(Pane1);

pack();

}

}

class ExceptTestPane1 extends Box{

public ExceptTestPane1(){

super(BoxLayout..Y_AXIS);

group=new ButtonGroup();

addRadioButton("Integer divide yb zero",new ActionLIstener(){

    public void actionPerformed(ActionEvent event){

     a[1]=1/(a.length-a.length);

}

});

addRadioButton("Floation point divide  yb zero",new ActionLIstener(){

 public void actionPerformeformed(ActionEvent event){

     a[1]=a[2]/(a[3]-a[3]);

}

addRadioButton("Floation point divide by zero",new ActionLIstener(){

public void actionPerformed(ActionEvent event){

a[1]=a[2]/(a[3]-a[3]);

}

});

addRadioButton("Floation point divide yb zero",new ActionListener(){

 public void actionPerformed(ActionEvent event){

 a[1]=a[2]/(a[3]-a[3]);

}

});

addRadioButton("Array bounds",new ActionLIstener(){

public void actionPerformed(ActionEvent event){

a[1]=a[10];

}

});

addRadioButton("Bad cast",new ActionLIstener(){

public void actionPerformed(ActionEvent event){

a=(double[])event.getSource();

}

});

addRadioButton("Null pointer,new ActionLIstener(){

public void actionPerformed(ActionEvent event){

a=(double[])event.getSource();

}

});

addRadioButton("sqrt(-1)",new ActionLIstener(){

public void actionPerformed(ActionEvent event){

a[1]=Math.sart(-1);

}

});

addRadioButton("Overflow",new ActionLIstener(){

public void actionPerformed(ActionEvent event){

a[1]=1000*1000*1000*1000;

int n=(int)a[1];

}

});

addRadioButton("No such file",new ActionLIstener(){

public void actionPerformed(ActionEvent event){

try{

InputStream in=new FileInputStream("woozle.txt");

}

catch (IOException e){

textField.setText(e.toString());

}

}

});

addRadioButton("Throw unknown",new ActionLIstener(){

public void actionPerformed(ActionEvent event){

 throw new UnknownError();

}

});

textField=new JTextField(30);

add(textField);

}

private void addRadioButton(String s,ActionLIstener listener){

JRadioButton button=new JRadioButton(s,false){

protected void fireActionPerformed(ActiopnEvent event){

try{

textField.setText("No exception");

super.fireActionPerformed(event);

}

catch (Exception e)

textField.setText(e.toString());

}

}

};

button.addActionLIstener(listener);

add(button);

group.add(button);

}

private button group group;

private JTextField textField;

private double[] a=new double [10];

}