Construct a JTextField using Array with Event Listener

Output:

Code:

/**
 * File: arrayJTextField.java
 * Tiltle: Construct a JTextField using Array with Event Listener
 * 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 arrayJTextField extends JFrame {
 
 //Initializing JTextField, JPanel, JLabel
 private JTextField field[];
 private JPanel panel;
 private JLabel caption;

 //Setting up GUI
    public arrayJTextField() {
     
     //Setting up the Title of the Window
     super("Construct a JTextField using Array with Event Listener");

     //Set Size of the Window (WIDTH, HEIGHT)
     setSize(400,250);

     //Exit Property of the Window
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
     //Constructing JTextField with an array size of 5
     field = new JTextField[5];
     
     //Constructing JLabel which is used to display text if the action is successfully implemented.
     caption = new JLabel("No Action Yet...");
     caption.setHorizontalAlignment(SwingConstants.CENTER); //Align the JLabel to Center
     
     //Constructing JPanel for group of JTextFields with a GridLayout of 6 rows and 1 column
     panel = new JPanel();
     panel.setLayout(new GridLayout(6,1)); //Set JPanel's Layout
     panel.add(caption); //Adding the JLabel in the JPanel placing at the very top

     //Constructing all 5 JTextFields with a size of 20 using "for loop"
     for(int count=0; count<field.length; count++) {
      field[count] = new JTextField("Field "+(count+1),20);
      panel.add(field[count]);
     }

     //Setting up the container ready for the components to be added.
     Container pane = getContentPane();
     setContentPane(pane);
     
     //Implemeting Even-Listener on JTextField's reference name "field[0]" using ActionListener
  field[0].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 1 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[1]" using ActionListener
  field[1].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 2 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[2]" using ActionListener
  field[2].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 3 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[3]" using ActionListener
  field[3].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 4 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[4]" using ActionListener
  field[4].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 5 Event Listener Successfully Implemented");
   }
  }
  );

     //Adding the JPanel to the container
     pane.add(panel);

     /**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) {
     arrayJTextField pjtf = new arrayJTextField();
 }
}

Important Part of the Program:

//Constructing JTextField with an array size of 5
JTextField field = new JTextField[5];

//Constructing JPanel for group of JTextFields with a GridLayout of 6 rows and 1 column
     JPanel panel = new JPanel();
     panel.setLayout(new GridLayout(6,1)); //Set JPanel's Layout
     panel.add(caption); //Adding the JLabel in the JPanel placing at the very top

     //Constructing all 5 JTextFields with a size of 20 using "for loop"
     for(int count=0; count<field.length; count++) {
      field[count] = new JTextField("Field "+(count+1),20);
      panel.add(field[count]);
     }

//Implemeting Even-Listener on JTextField's reference name "field[0]" using ActionListener
  field[0].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 1 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[1]" using ActionListener
  field[1].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 2 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[2]" using ActionListener
  field[2].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 3 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[3]" using ActionListener
  field[3].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 4 Event Listener Successfully Implemented");
   }
  }
  );
  
  //Implemeting Even-Listener on JTextField's reference name "field[4]" using ActionListener
  field[4].addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    /**Display this message using JLabel if the action
       is Successfully Implemented using the method setText()
    */
    caption.setText("Field 5 Event Listener Successfully Implemented");
   }
  }
  );

     //Adding the JPanel to the container
     pane.add(panel);

Posted in: JTextField