Copy Text from JTextField to JTextArea

Output:

Code:

/**

 * File: textFieldToTextArea.java

 * Tiltle: Copy Text from JTextField to JTextArea

 * Author: http://java-code-complete.blogspot.com

 */



//Java Core Package

import javax.swing.*;

//Java Extension Package

import java.awt.*;

import java.awt.event.*;



public class textFieldToTextArea extends JFrame {

 

 //Initializing JTextField and JTextArea

 private JTextField field;

 private JTextArea area;



 //Setting up GUI

    public textFieldToTextArea() {

     

     //Setting up the Title of the Window

     super("Copy Text from JTextField to JTextArea");



     //Set Size of the Window (WIDTH, HEIGHT)

     setSize(310,225);



     //Exit Property of the Window

     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);



     //Constructing JTextField with a size of 26

     field = new JTextField(26);

     

     //Constructing JTextArea with a LENGTH:10 WIDTH:26

     area = new JTextArea(10,26);



     //Setting up the container ready for the components to be added.

     Container pane = getContentPane();

     setContentPane(pane);

     

     //Setting up the container layout

     FlowLayout flow = new FlowLayout(FlowLayout.CENTER);

     pane.setLayout(flow);

     

     //Implemeting Even-Listener on JTextField's reference name "field" using ActionListener

  field.addActionListener(

  new ActionListener() {

   

   //Handle JTextField event if Enter key is pressed

   public void actionPerformed(ActionEvent event) {

    

    //Copy Text from JTextField to JTextArea

    area.setText(field.getText());

    

    //The JTextField will be empty after Enter key is pressed ready for the next input.

    field.setText(null);

   }

  }

  );



     //Adding the JTextField and JTextArea to the container

     pane.add(field);

     pane.add(area);



     /**Set all the Components Visible.

      * If it is set to "false", the components in the container will not be visible.

      */

     setVisible(true);

    }

    

 //Main Method

    public static void main (String[] args) {

     textFieldToTextArea jtta = new textFieldToTextArea();

 }

}

Important Part of the Program:

//Implemeting Even-Listener on JTextField's reference name "field" using ActionListener

  field.addActionListener(

  new ActionListener() {

   

   //Handle JTextField event if Enter key is pressed

   public void actionPerformed(ActionEvent event) {

    

    //Copy Text from JTextField to JTextArea

    area.setText(field.getText());

    

    //The JTextField will be empty after Enter key is pressed ready for the next input.

    field.setText(null);

   }

  }

  );