Copy Text from JTextField to JTextField

Output:

Code:

/**
 * File: textFieldToTextField.java
 * Tiltle: Copy Text from JTextField to JTextField
 * 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 textFieldToTextField extends JFrame {
 
 //Initializing JTextField
 private JTextField field1, field2;

 //Setting up GUI
    public textFieldToTextField() {
     
     //Setting up the Title of the Window
     super("Copy Text from JTextField to JTextField");

     //Set Size of the Window (WIDTH, HEIGHT)
     setSize(320,100);

     //Exit Property of the Window
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

     //Constructing JTextField with a size of 20
     field1 = new JTextField(20);
     field2 = new JTextField(20);

     //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.LEFT);
     pane.setLayout(flow);
     
     //Implemeting Even-Listener on JTextField's reference name "field1" using ActionListener
  field1.addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    //Copy Text from JTextField field1 to field2
    field2.setText(field1.getText());
    
    //The JTextField will be empty after Enter key is pressed ready for the next input.
    field1.setText(null);
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field2" using ActionListener
  field2.addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    //Copy Text from JTextField field2 to field1
    field1.setText(field2.getText());
    
    //The JTextField will be empty after Enter key is pressed ready for the next input.
    field2.setText(null);
   }
  }
  );

     //Adding the JTextField components to the container
     pane.add(field1);
     pane.add(field2);

     /**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) {
     textFieldToTextField jtff = new textFieldToTextField();
 }
}

Important Part of the Program:

field1.addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    //Copy Text from JTextField field1 to field2
    field2.setText(field1.getText());
    
    //The JTextField will be empty after Enter key is pressed ready for the next input.
    field1.setText(null);
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field2" using ActionListener
  field2.addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    //Copy Text from JTextField field2 to field1
    field1.setText(field2.getText());
    
    //The JTextField will be empty after Enter key is pressed ready for the next input.
    field2.setText(null);
   }
  }
  );

Posted in: JTextField