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

public class PrintExample extends JFrame implements ActionListener
{
	final int ROWS = 30;
	final int COLUMNS = 40;
	
	private JButton printButton;
	private JTextArea textArea;
	private JScrollPane scrollPane;


    public static void main ( String args[])
    {
		PrintExample printExample = new PrintExample();

		WindowAdapter windowAdapter = new WindowAdapter()
		{
			public void windowClosing( WindowEvent e )
			{
				System.exit( 0 );
			}
		};
		
		printExample.addWindowListener( windowAdapter );
	}

	public PrintExample()
	{
		Container container = getContentPane();		
		container.setLayout( new FlowLayout() );

		printButton = new JButton( "Print" );
		textArea = new JTextArea(ROWS,COLUMNS);
		Insets i = new Insets(25, 25,25, 25);
		scrollPane = new JScrollPane(textArea);

		container.add(printButton);
		container.add(scrollPane);

        printButton.addActionListener(this);

		textArea.setMargin(i); 
		
		setSize( 600, 600 );

		show();
    }


	public void actionPerformed(ActionEvent e) 
	{
    	if (e.getSource() instanceof JButton) 
    	{ 
	        PrintJob printJob = getToolkit().getPrintJob(this,"Printing Test", null, null);
	        
            if (printJob != null) 
            {          
			    Graphics graphics = printJob.getGraphics();
                printLongString(printJob,graphics ,textArea.getText());
                
                
                graphics.dispose(); // flush page
                printJob.end();
            }
		}
	}

	// Print string to graphics via printjob
	// Does not deal with word wrap or tabs
	void printLongString (PrintJob printJob, Graphics graphics, String s) 
	{
		final int PAGE_TOP = 25;
		final int PAGE_BOTTOM = 50;
		final int PAGE_LEFT = 25;
		final int TAB_WIDTH = 50;
		
		StringReader stringReader = new StringReader (s);
		LineNumberReader lineNumberReader = new LineNumberReader (stringReader);
		
		String nextLine;
		int pageHeight = printJob.getPageDimension().height;
		
		Font font = new Font("Helvetica", Font.PLAIN, 12);
		graphics.setFont (font);
		
		FontMetrics fontMetrics = graphics.getFontMetrics(font);
		
		int fontHeight = fontMetrics.getHeight();
	
		int fontDescent = fontMetrics.getDescent();
		int curHeight = PAGE_TOP;
		
		try 
		{
			do 
			{
				nextLine = lineNumberReader.readLine();
				
				if (nextLine != null) 
				{         
				  if ((curHeight + fontHeight) > pageHeight - PAGE_BOTTOM) 
				  {
				    // New Page
				    graphics.dispose();
				    graphics = printJob.getGraphics();
				    
				    if (graphics != null) 
				    {
				      graphics.setFont (font);
				    }
				    curHeight = PAGE_TOP;
				  }
				  curHeight += fontHeight;
				  
				  if (graphics != null) 
				  {
				  	int Tabs;
				  	
				  	Tabs = 0; 
				  	
				  	while( Tabs < nextLine.length() && 
				  		 	nextLine.charAt(Tabs) == '\t')
				  		 Tabs++;
				  		 
				  		 //remove the leading tabs
				  	
				  	graphics.drawString (nextLine, PAGE_LEFT + (Tabs * TAB_WIDTH), curHeight - fontDescent);
				  } 
				  else 
				  {
				    System.out.println ("graphics null");
				  }
				}
			} while (nextLine != null);
		} 
		catch (Throwable t) 
		{ 
		  t.printStackTrace();
		}
	}

}