Java Programming Code Examples
Java > Java AWT Code Examples
FocusListener example
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FocusListener example
import java.awt.*;
import java.awt.event.*;
public class FocusListenertest extends Frame implements FocusListener
{
Button b1,b2;
public FocusListenertest()
{
add(b1=new Button ("First"),"South");
add(b2=new Button ("Second"),"North");
b1.addFocusListener(this);
b2.addFocusListener(this);
setSize(200,200);
//pack(); //Takes minimum size for the window
}
public void focusGained(FocusEvent fe) //method of focuslistener
{
if(fe.getSource()==b1)
System.out.println(b1.getLabel()+"gained");
if(fe.getSource()==b2)
System.out.println(b2.getLabel()+"gained");
if(fe.isTemporary())
System.out.println("Temporary Focus");
}
public void focusLost(FocusEvent fe) //in focusevent "getID()"is a method
{
if(fe.getSource()==b1)
System.out.println(b1.getLabel()+"lost");
if(fe.getSource()==b2)
System.out.println(b2.getLabel()+"lost");
}
public static void main(String a[])
{
new FocusListenertest().setVisible(true);
}
}
