Thread: add action listener problem

i have getting errors when i try to compile this code relating to ACTIONLISTENER . i use JDK1.3

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
class temp extends Frame
{
Button b1,b2;
Label l1,l2;
TextField t1,t2;
public temp (String t)
{
super(t);
b1=new Button("CONVERT");
b2=new Button("CANCEL");
l2=new Label("TEMPRETURE IN C");
l1=new Label("TEMPRETURE IN F");
t1=new TextField("20");
t2=new TextField("20");
setLayout (new FlowLayout());
add(l1);
add(t1);
add(l2);
add(t2);
add(b1);
add(b2);
t2.setEditable(false);
setSize(500,500);
setVisible (true);
b1.addActionListener(this);
b2.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)
{
float a=Float.parseFloat(t1.getText());
float b;
b=(9/5*(a+32));
t2.setEditable(true);
t2.setText (String.valueOf(b));
t2.setEditable(false);
show();
}
if(e.getSource()==b2)
{
System.exit (0);
} } }

these are the errors on compilation . i use jdk1.3

Originally Posted by chronoz13

b1.addActionListener(this);
b2.addActionListener(this);

these 2 addActionListeners(this) or the reserved word 'this' refer to your class's instance(a temp instance), not to an instance of an ActionListener interface or a class that implements an ActionListener interface

better start from here
How to Write an Action Listener (The Java™ Tutorials > Creating a GUI With JFC/Swing > Writing Event Listeners)

great thanks .

you should first implement ActionListener to use actionEvent.