How do I implement ActionListener with a non abstract class in Java

StackOverflow https://stackoverflow.com/questions/22827609

Question

Here is a code that i am trying to compile.all i get is error like this

s09_02 is not abstract and does not override abstract method actionPerformed(java.awt.event.ActionEvent) in java.awt.event.ActionListener.

So my question is, how can I implement ActionListener into my class (s09_02) if the class is not abstract?

Here is the entire code: (Because I have no idea where the problem could be)

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class s09_02 extends Applet implements ActionListener{
public void init()
 {
  setLayout(null);
  setBackground(new Color(0,10,100));
 }
 public void paint(Graphics p){String t=null;
 int x,y,w,h,r,g,b;
 t=getParameter("xx");
 x=Integer.parseInt(t);
 t=getParameter("yy");
 y=Integer.parseInt(t);
 t=getParameter("ww");
 w=Integer.parseInt(t);
 t=getParameter("hh");
 h=Integer.parseInt(t);
 t=getParameter("rr");
 r=Integer.parseInt(t);
 t=getParameter("gg");
 g=Integer.parseInt(t);
 t=getParameter("bb");
 b=Integer.parseInt(t);
 p.setColor(new Color(r,g,b));
 p.fillRect(x,y,w,h);

} }

<html>
<body>
<applet code="s09_02.class" width=400 height=400>
<param name="xx" value="25"><param name="yy" value="25">
<param name="ww" value="150"><param name="hh" value="150">
<param name="rr" value="0"><param name="gg" value="150">
<param name="bb" value="100">
</applet>
</body>
</html>


Also suggest me what changes should i make in this code so that code runs properly ??
Thanks...
Was it helpful?

Solution

You need to add public void actionPerformed(ActionEvent e){} in you code as you are implementing ActionListner.

ActionListner is an interface so you need to override the abstract methods of ActionListner

If you are not using any event then remove the implements ActionListner from your code.

OTHER TIPS

You need to implement the method 

    @override
public void actionPerformed(ActionEvent e){
//code that dose something
}

http://docs.oracle.com/javase/7/docs/api/java/awt/event/ActionListener.html

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