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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); } }