Add Items on JList using JTextField

Output:

Code:

/**
 * File: jtextfieldToJList.java
 * Tiltle: Add Items on JList using JTextField
 * Author: http://java-program-sample.blogspot.com
 */
 
//Java Extension Packages
import javax.swing.*;
//Java Core Packages
import java.awt.*;
import java.awt.event.*;

public class jtextfieldToJList extends JFrame {
 
 //Initializing JTextField, JList, and DefaultListModel class
 private DefaultListModel model;
 private JList list;
 private JTextField input;

 //Setting up GUI
 public jtextfieldToJList() {

 //Setting up the Title of the Window
 super("Add Item on JList using JTextField");

 //Set Size of the Window (WIDTH, HEIGHT)
 setSize(280,170);

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

 //Constructing JTextField, JList, and DefaultListModel
 model = new DefaultListModel();
 input = new JTextField("Type your Inputs Here and Press Enter");
 list = new JList(model);

 //Setting JList Properties
 list.setVisibleRowCount(8);  //Number of Itmes to be displayed. If greater than 8, Vertical ScrollBar will be displayed.
 list.setFixedCellHeight(15); //Fix width of the JList
 list.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);

 //Setting up the container ready for the components to be added.
    Container pane = getContentPane();
    setContentPane(pane);

 //Implemeting Even-Listener on JTextField's reference name "input" using ActionListener
 input.addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    //Store the input from JTextField to the variable "message"
    String message = "The input <"+input.getText()+"> is Successfully Added!";
    
    //Adding items or elements from JTextField to JList
    model.addElement(input.getText());
    
    //Display the input from JTextField to JOptionPane using the variable "message"
    JOptionPane.showMessageDialog(null, message,"Successfully Added!",JOptionPane.INFORMATION_MESSAGE);
    
    //The JTextField will be empty after JOptionPane is closed ready for the next input.
    input.setText(null);
   }
  }
  );

 //Adding JTextField in the container with a BorderLayout of NORTH
 pane.add(input,BorderLayout.NORTH);

 //Adding the JList in the container with a component JScrollPane that's automatically creates Vertical and Horizontal Scroll Bar
 //if the items or elements are greater than the specified "VisibleRowCount" in line 38.
 pane.add(new JScrollPane(list),BorderLayout.SOUTH);
 
 /**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) {
  jtextfieldToJList aijl = new jtextfieldToJList();
 }
}

Important Part of the Program:

//Implemeting Even-Listener on JTextField's reference name "input" using ActionListener
 input.addActionListener(
  new ActionListener() {
   
   //Handle JTextField event if Enter key is pressed
   public void actionPerformed(ActionEvent event) {
    
    //Store the input from JTextField to the variable "message"
    String message = "The input <"+input.getText()+"> is Successfully Added!";
    
    //Adding items or elements from JTextField to JList
    model.addElement(input.getText());
    
    //Display the input from JTextField to JOptionPane using the variable "message"
    JOptionPane.showMessageDialog(null, message,"Successfully Added!",JOptionPane.INFORMATION_MESSAGE);
    
    //The JTextField will be empty after JOptionPane is closed ready for the next input.
    input.setText(null);
   }
  }
  );

Posted in: JTextField