Help. Key Event. Gui.

Question

hi guys, i have a small problem. i have a form with textfields and buttons... there are two buttons particularly labeled "Enter" and "Cancel".
how do i activate the "Enter" by pressing the carriage return key while the cursor is in another component, like the textfields.

Answer 1

...here are two buttons particularly labeled "Enter" and "Cancel".
how do i activate the "Enter" by pressing the carriage return key while the
cursor is in another component, like the textfields.simple demo, provided the textfields do not have an actionListener added to them
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing
  public void buildGUI()
    JTextField tf = new JTextField(5);
    JButton btn = new JButton("Enter");
    JFrame f = new JFrame();
    f.getContentPane().add(tf,BorderLayout.CENTER);
    f.getContentPane().add(btn,BorderLayout.SOUTH);
    f.pack();
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
    f.getRootPane().setDefaultButton(btn);//<-----------------
    btn.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        System.out.println("button clicked");
  public static void main(String[] args)
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        new Testing().buildGUI();
}