Java FocusListener get component lost focus
import java.awt.event.FocusEvent; import java.awt.event.FocusListener; import javax.swing.JFrame; import javax.swing.JTextField; public class Main { public static void main(String[] a) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JTextField textField = new JTextField("A TextField"); textField.addFocusListener(new FocusListener() { public void focusGained(FocusEvent e) { System.out.println("focus gained " + (e.isTemporary() ? " (temporary):" : ":") + e.getComponent().getClass().getName() + "; Opposite component: " + (e.getOppositeComponent() != null ? e.getOppositeComponent().getClass().getName() : "null")); }/*from w w w . j av a 2 s . c o m*/ public void focusLost(FocusEvent e) { System.out.println("focus lost " + (e.isTemporary() ? " (temporary):" : ":") + e.getComponent().getClass().getName() + "; Opposite component: " + (e.getOppositeComponent() != null ? e.getOppositeComponent().getClass().getName() : "null")); } }); frame.add(textField, "North"); frame.add(new JTextField(), "South"); frame.setSize(300, 200); frame.setVisible(true); } }