Copy Text from JTextField to JTextArea

Output:

Code:

/**
 * File: textFieldToTextArea.java
 * Tiltle: Copy Text from JTextField to JTextArea
 * Author: http://java-program-sample.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);
   }
  }
  );

Posted in: JTextField