Trapping ENTER in a JTextField

Question

I have an applet that has a textfield and a submit button....
I want to be able to have the applet run the submit code when the user presses ENTER in the JTextField... like is done on many websites, so the user does not have to manually click 'submit'
How do I trap ENTER?

Answer 1

Darn it....
Here's the thing.. it works, but it compiles two classes, because I'm making a new KeyAdapter...
How do I avoid that? I'm not an expert Java programmer here, I learn as much as I need to write for my website...
Any help /guidance would be appreciated...
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
public class applet1 extends JApplet implements ActionListener
    JLabel label1 = new JLabel("Please enter street address of organization here");
    JLabel label2 = new JLabel("Enter unique ID here");
    JTextField textbox1 = new JTextField();
    JTextField textbox2 = new JTextField();
    JButton button1 = new JButton("Submit");
   public void init(){
      Container c1 = getContentPane(); 
       GridBagLayout gridbag = new GridBagLayout();
      GridBagConstraints constraints = new GridBagConstraints();
     '//removed gridbad constraint settings for clarity on this forum
      textbox2.addKeyListener(new KeyAdapter() {
          public void keyReleased(KeyEvent evt)
               if (evt.getKeyCode() == KeyEvent.VK_ENTER)
                         button1.doClick();
          button1.addActionListener(this);
    public void actionPerformed(ActionEvent event)
        int i=0;
        int f=0;
        Date myDate = new Date();
        int day = myDate.getDate();
        int month = myDate.getMonth() + 1;
        int code = Integer.parseInt(textbox2.getText());
        boolean matchFound=false;
        String h = (new String(textbox1.getText()).substring(0,10));
        String str;
        //search database
        try{
            URL url = new URL(getCodeBase(), "address.txt");
            InputStream inStream = url.openStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(inStream));
            StringBuffer l = new StringBuffer(10);
            StringBuffer r = new StringBuffer(20);
           //....removed code for clarity on this forum
        catch (Exception e)
            textbox1.setText("Data file missing");