Copy Text from JTextField to JTextField

Output:

Code:

/**

 * File: textFieldToTextField.java

 * Tiltle: Copy Text from JTextField to JTextField

 * 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 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);

   }

  }

  );