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import java.awt.Color;  
import java.awt.event.ItemListener;  
import java.awt.event.ItemEvent;  
import javax.swing.*;  

public class framed implements ItemListener {  

    JToggleButton jtButton;  
    public JPanel createAndShowNewPane() {  


        JPanel GUI= new JPanel();  
        GUI.setLayout(null);  

        JPanel buttonPane= new JPanel();  
        buttonPane.setLayout(null);  
        buttonPane.setSize(200,300);  
        buttonPane.setLocation(0,0);  
        GUI.add(buttonPane);  


        jtButton= new JToggleButton("On");  
        jtButton.setSize(90,50);  
        jtButton.setLocation(100,0);  
        jtButton.addItemListener(this);  
        buttonPane.add(jtButton);  






        return GUI;  


    }  

    public static void window(){  
        JFrame.setDefaultLookAndFeelDecorated(true);  
        JFrame frame= new JFrame("Hi");  
        framed frame1= new framed();  
        frame.setContentPane(frame1.createAndShowNewPane());  
        frame.setVisible(true);  
        frame.setSize(100,100);  
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  


    }  
     public void actionPerformed(ItemEvent e) {  
            if(e.getStateChange() == ItemEvent.SELECTED)  
            {  
             jtButton.setText("Off");  

            }  
            else   
            {  
               jtButton.setText("On");  
            }}  
public static void main(String[] args){  
    SwingUtilities.invokeLater(new Runnable(){  
        public void run(){window();}  
    } );  
}  
} 

Hey,

I was just wondering what is up with this. I got the framed class must implement inherited abstract class ItemListener.itemStateChange(ItemEvent); error when I tried to implement ItemListner, and it highlighted framed. I tryed my own version as this: GuideBook . I don't know what the issue is. I tried to google this issue, as well as cross reference the other example, and nothing. Could anyone shed some light on this? Thanks!

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Last Post by vivosmith
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  • ... OK... you renamed "itemStateChanged" to "actionPerformed." The compiler is looking for "itemStateChanged" because that's what ItemListener requires. I simply changed the name back and the code ran fine. Read More

2

... OK... you renamed "itemStateChanged" to "actionPerformed." The compiler is looking for "itemStateChanged" because that's what ItemListener requires.

I simply changed the name back and the code ran fine.

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