JTextField and JButton: share the same event handler

[Mousa A. Rafi]

I've a JFrame that has a JTextField and a JButton object. After typing something in the Textfield I want the JButton to be clicked when I hit Enter.
How can I do it? Does it have something to do with Actions?

Code example will be helpful. Thanks in advance.

[Gregg Bolinger]

textField.addActionListener(new ActionListener()
{
   public void actionPerformed(ActionEvent e)
   {
      doSomeAction(e);
   }
});
 
button.addActionListener(new ActionListener()
{
   public void actionPerformed(ActionEvent e)
   {
      doSomeAction(e);
   }
});
 
private void doSomeAction(ActionEvent e)
{
   // do stuff here
}

This is one of several ways. You could also create an Action and give both components and instance of said Action. Most of the code would look the same though.

[Michael Dunn]

here's another way

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing extends JFrame
{
  public Testing()
  {
    setLocation(400,300);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel(new GridLayout(3,1));
    final JTextField tf = new JTextField(10);
    final JLabel lbl = new JLabel();
    JButton btn = new JButton("Enter");
    btn.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        lbl.setText(tf.getText());}});
    jp.add(tf);
    jp.add(lbl);
    jp.add(btn);
    getContentPane().add(jp);
    pack();
    getRootPane().setDefaultButton(btn);//<--------------------
  }
  public static void main(String args[]){new Testing().setVisible(true);}
}