Anonymous Inner Class

[sean cee]

Hi guys,
I came across a question saying that "An anonymous inner class can be created inside a method" is false....
where else can it be created then?
Thanks

[Bin Zhao]

"An anonymous inner class can be created inside a method"
is TRUE.
Consider the following code:
public A aMethod(){
return new A(){
....
};
}
Here in method aMethod(), an anonymous class wich extends class A is defined.

[sean cee]

Bin,
you are right.
anoymous inner class CANNOT be created anywhere outside the method ... right?
thanks.

[Subha Guhan]

Sean

Are you reproducing the question verbatim?
It is not only possible to create it inside the method but also in the following ways.

import java.awt.*;
import java.awt.event.*;
public class myFrame extends Frame{

Button abutton = new Button("You can't be anonymous at the Ranch");

TextField txt = new TextField("Anonymous classes");

<font color=red>//1. Assigned to an Object reference </font>
WindowAdapter wclose = new WindowAdapter(){
public void windowClosing(WindowEvent evt){
                   dispose();
   System.exit(0);
                 }
} ; 
//anonymous class that will let me close the frame
myFrame(){

setLayout(new FlowLayout());
add(abutton);
addWindowListener(wclose);

<font color=red>//******  2. As a Parameter to a method
</font>
    abutton.addActionListener(new ActionListener(){
 public void actionPerformed(ActionEvent e){
abutton.setLabel("what can i do for you");
}
   });
add(txt);
pack();
}

<font color=red>//***** 3. In a Static or Instance Initializer
</font>
{
txt.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
abutton.setLabel("you modified text");
}
 });

}

public Button method()
{
 return new Button("dsfsdf");

}

public static void main(String args[])
{
myFrame fr = new myFrame();
fr.setSize(200,100);
fr.setVisible(true);


}

please correct me if I am wrong
[This message has been edited by Subha Guhan (edited November 07, 2000).]
[This message has been edited by Subha Guhan (edited November 07, 2000).]

[sean cee]

Hi,
Subha, You are right.
your code make good sense.
Thanks