Hi friend,

Code to help in solving the problem :


public class WordDelimiter{

public static void main(String args[]) {
HomePage page = new HomePage();
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
}
}


import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class HomePage extends JFrame implements ActionListener {

JLabel label;
JTextArea arr;
private JScrollPane scrollPane;
JButton button;

public HomePage() {
this.setLayout(null);

label = new JLabel("Enter text");
label.setBounds(30, 10, 100, 25);

arr = new JTextArea(100, 10);
this.scrollPane = new JScrollPane(arr);
scrollPane.setBounds(30, 40, 320, 150);

button = new JButton("Submit");
button.setBounds(30, 200, 100, 25);
button.addActionListener(this);

this.add(label);
this.add(scrollPane);
this.add(button);

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {

String[] text = arr.getText().split(" ");
List list = new ArrayList();
for (int i = 0; i < text.length; i++) {
list.add(text[i]);
}
MainPage page = new MainPage(list);
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
this.setVisible(false);
}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class MainPage extends JFrame implements ActionListener {

JTextArea arr;
JScrollPane scrollPane;
JButton addString, updateString, deleteString;
List list;

public MainPage(List list) {

this.list = list;

String str = "";
for (int i = 0; i < this.list.toArray().length; i++) {
str = str + this.list.get(i) + " ";
}

this.setLayout(null);
arr = new JTextArea(str, 100, 10);
scrollPane = new JScrollPane(arr);
scrollPane.setBounds(30, 20, 320, 150);

addString = new JButton("Add");
addString.setBounds(30, 200, 80, 25);

updateString = new JButton("Update");
updateString.setBounds(150, 200, 80, 25);

deleteString = new JButton("Delete");
deleteString.setBounds(270, 200, 80, 25);


this.add(scrollPane);
this.add(addString);
this.add(updateString);
this.add(deleteString);

addString.addActionListener(this);
updateString.addActionListener(this);
deleteString.addActionListener(this);

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {


if (e.getActionCommand().equals("Add")) {
AddString page = new AddString(this.list);
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
this.setVisible(false);
}

if (e.getActionCommand().equals("Update")) {
UpdateString page = new UpdateString(this.list);
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
this.setVisible(false);
}

if (e.getActionCommand().equals("Delete")) {
deleteString page = new deleteString(this.list);
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
this.setVisible(false);
}
}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

public class AddString extends JFrame implements ActionListener {

JLabel index, text;
JTextField textField, indexField;
JButton submit, cancel;
List list;

public AddString(List list) {
this.list = list;

this.setLayout(null);

index = new JLabel("Index");
index.setBounds(80, 40, 100, 25);

text = new JLabel("Text");
text.setBounds(80, 80, 100, 25);

indexField = new JTextField();
indexField.setBounds(160, 40, 100, 25);

textField = new JTextField();
textField.setBounds(160, 80, 150, 25);

submit = new JButton("Submit");
submit.setBounds(60, 130, 80, 25);

cancel = new JButton("Cancel");
cancel.setBounds(160, 130, 80, 25);

submit.addActionListener(this);
cancel.addActionListener(this);

this.add(index);
this.add(text);
this.add(indexField);
this.add(textField);
this.add(submit);
this.add(cancel);

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {
int flag = 0;
if (e.getActionCommand().equals("Submit")) {


try {
list.add(Integer.parseInt(indexField.getText()), textField.getText());
} catch (Exception ex) {
flag = 1;
JOptionPane.showMessageDialog(this,
"Worang index ... ",
"warning",
JOptionPane.WARNING_MESSAGE);
}

if (flag == 0 && textField.getText().trim().equals("")) {

flag = 1;
JOptionPane.showMessageDialog(this,
"Enter some text ... ",
"warning",
JOptionPane.WARNING_MESSAGE);
}
}
if (flag == 0 || e.getActionCommand().equals("Cancel")) {
MainPage page = new MainPage(list);
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
this.setVisible(false);
}
}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

public class UpdateString extends JFrame implements ActionListener {

JLabel index, text;
JTextField textField, indexField;
JButton submit, cancel;
List list;

public UpdateString(List list) {
this.list = list;

this.setLayout(null);

index = new JLabel("Index");
index.setBounds(80, 40, 100, 25);

text = new JLabel("Text");
text.setBounds(80, 80, 100, 25);

indexField = new JTextField();
indexField.setBounds(160, 40, 100, 25);

textField = new JTextField();
textField.setBounds(160, 80, 150, 25);

submit = new JButton("Submit");
submit.setBounds(60, 130, 80, 25);

cancel = new JButton("Cancel");
cancel.setBounds(160, 130, 80, 25);

submit.addActionListener(this);
cancel.addActionListener(this);

this.add(index);
this.add(text);
this.add(indexField);
this.add(textField);
this.add(submit);
this.add(cancel);

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {
int flag = 0;
if (e.getActionCommand().equals("Submit")) {


try {
list.set(Integer.parseInt(indexField.getText()), textField.getText());
} catch (Exception ex) {
flag = 1;
JOptionPane.showMessageDialog(this,
"Worang index ... ",
"warning",
JOptionPane.WARNING_MESSAGE);
}

if (flag == 0 && textField.getText().trim().equals("")) {

flag = 1;
JOptionPane.showMessageDialog(this,
"Enter some text ... ",
"warning",
JOptionPane.WARNING_MESSAGE);
}
}
if (flag == 0 || e.getActionCommand().equals("Cancel")) {
MainPage page = new MainPage(list);
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
this.setVisible(false);
}
}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;

public class deleteString extends JFrame implements ActionListener {

JRadioButton delete, deleteAll;
JTextField index;
JLabel label;
JButton submit, cancel;
List list;

public deleteString(List list) {
this.list = list;

setLayout(null);

delete = new JRadioButton("Delete Item");
delete.setBounds(30, 40, 100, 25);
delete.setSelected(true);

deleteAll = new JRadioButton("Delete All Item");
deleteAll.setBounds(30, 100, 120, 25);

label = new JLabel("Index");
label.setBounds(70, 70, 100, 25);

index = new JTextField();
index.setBounds(120, 70, 100, 25);

submit = new JButton("Submit");
submit.setBounds(50, 150, 100, 25);

cancel = new JButton("Cancel");
cancel.setBounds(180, 150, 100, 25);

ButtonGroup ButtonGroup = new ButtonGroup();
ButtonGroup.add(delete);
ButtonGroup.add(deleteAll);

add(delete);
add(deleteAll);
add(index);
add(label);
add(submit);
add(cancel);

delete.addActionListener(this);
deleteAll.addActionListener(this);
submit.addActionListener(this);
cancel.addActionListener(this);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void actionPerformed(ActionEvent e) {

int flag = 0;
if (e.getActionCommand().equals("Delete Item")) {
index.setVisible(true);
label.setVisible(true);
}

if (e.getActionCommand().equals("Delete All Item")) {
index.setVisible(false);
label.setVisible(false);

}

if (e.getActionCommand().equals("Submit") && delete.isSelected()) {
flag = 1;
list.remove(Integer.parseInt(index.getText()));
}

if (e.getActionCommand().equals("Submit") && deleteAll.isSelected()) {
flag = 1;
list.clear();
}

if (e.getActionCommand().equals("Cancel") || flag == 1) {
MainPage page = new MainPage(list);
page.setSize(400, 300);
page.setLocation(200, 100);
page.setVisible(true);
this.setVisible(false);
}
}
}

For read more information,examples and tutorials on Swing visit to :

http://www.roseindia.net/java/example/java/swing/

Thanks