/*
	The program creates a JTextArea with scroll bars
	
*
*/

import javax.swing.*;
import java.awt.event.*;

public class TextArea extends JFrame
{
	JPanel panel;
	JButton ok;
	JTextArea txt;
	JScrollPane scroll;
	
	public TextArea()
	{
		// Sets the title
		
		setTitle("Text Area");
		
		// Sets the size
		
		setSize(300, 400);
		
		// Sets the event when the window close
		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		// Creates a panel
		
		panel = new JPanel();
		
		// Creates an empty Text Area with 10 rows and 20 columns 
		txt = new JTextArea("", 10, 20);
		
		// Creates a button
		
		ok = new JButton("OK");
		
		// Create a scroll pane in the text area
		
		scroll = new JScrollPane(txt,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
		
		// Adds the scroll to the panel
		
		panel.add(scroll);
		
		// Adds the button to the panel
		
		panel.add(ok);
		
		// Adds the panel to the content pane
		
		add(panel);
		
		// Sets the window to be visible
		
		setVisible(true);
		
		// Creates an action listener
		
		ok.addActionListener(new ButtonListener());
		
	}
	
	public class ButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			if(e.getSource()==ok)
			{
				// Appends Hello World to the text area whenever ok button is clicked
				
				txt.append("Hello World!!!\n");
			}
			
		}
	}
	
	public static void main(String[] args)
	{
		new TextArea();
	}
}