Troble working with JButtons..

[Scott Cajun]

Baisical its a marine simulation, and i am coing a GUI where there are 3 buttons to feed 3 different fish, bt i cannot seem to get the right code layout to get it to work, can you try and see what the problem is?

ok right, this is my current code..
 
class InterfaceFrame extends Frame
{
..code, textfrield variables etc
..code creating and placing the fish/background on the screen
 
public InterfaceFrame(String title)
{
...code about all the other layout, panels, etc
 
//right hand bar, with feeding buttons
Panel sidebar = new Panel();
add("East",sidebar);
sidebar.setLayout(new BoxLayout(sidebar, BoxLayout.Y_AXIS));
 
JButton feed1 = new JButton("Feed Fish 1");
JButton feed2 = new JButton("Feed Fish 2");
JButton feed3 = new JButton("Feed Fish 3");
 
sidebar.add(feed1);
sidebar.add(feed2);
sidebar.add(feed3);
 
class fishbutton extends JButton {
public void feed()
{
fish1.feedWorms();
}
 
}
}
}

it compiles.. but the button doesn't do anything
also, if i try to add:
feed1.addActionListener(this);
feed2.addActionListener(this);
feed3.addActionListener(this);

it gives me a compile error... "addActionListener(java.awt.Event.ActionListener) in javax.swing.AbstactButton cannot be applied to (InterfaceFrame)"

[Michael Dunn]

> it compiles.. but the button doesn't do anything

the button/s need a listener before they can do anything.

addActionListener(this) needs the class to implement the ActionListener interface
i.e. class InterfaceFrame extends Frame implements ActionListener
and then your code goes into actionPerformed(..), but this style of using
ActionListener is not the best.

Either create a separate class that is an ActionListener
e.g. class FeedListener implements ActionListener
or use anonymous inner classes that have a specific task
e.g. feed1.addActionListener(new ActionListener(){...


this part of your code may cause you painting problems
class InterfaceFrame extends Frame
JButton feed1 = new JButton("Feed Fish 1");

Frame is an AWT component, and JButton is a Swing Component.
Mixing the two is not recommended