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POwhen is the print method of printable interface called in this code and ...?
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  1. POwhen is the print method of printable interface called in this code and ...?
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    copied!<pre><code>// Program to print simple text on a Printer import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.awt.print.PrinterException; import java.awt.print.*; class Printer extends JPanel implements Printable { JButton print; Printer() { buildGUI(); hookUpEvents(); } public void buildGUI() { JFrame fr = new JFrame("Program to Print on a Printer"); JPanel p = new JPanel(); print = new JButton("Print"); setPreferredSize( new Dimension ( 200,200 ) ); p.setBackground( Color.black ); fr.add(p); p.add( print , BorderLayout.CENTER ); fr.pack(); fr.setVisible( true ); } public void hookUpEvents() { print.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent ae ) { PrinterJob job = PrinterJob.getPrinterJob(); job.setPrintable( new Printer() ); boolean doPrint = job.printDialog(); if( doPrint ) { try { job.print(); } catch( PrinterException exc) { System.out.println( exc ); } } else { System.out.println("You cancelled the print"); } } }); } public int print( Graphics g , PageFormat pf , int pageIndex) throws PrinterException{ Graphics2D g2d = (Graphics2D)g; g2d.translate(pf.getImageableX(), pf.getImageableY()); g.drawString( "testing..." , 100 , 100 ); return PAGE_EXISTS; } public static void main( String args[] ) { new Printer(); } } </code></pre> <p>After the command <code>java Printer</code> the output is :</p> <p><img src="https://i.stack.imgur.com/pjN4H.jpg" alt="enter image description here"></p> <p>But as i click print , along with the following window :</p> <p><img src="https://i.stack.imgur.com/gkkBQ.jpg" alt="enter image description here"></p> <p>i again get the former window. Why does this happen ?</p> <p><strong>When does the <code>print</code> method of <code>Printable interface</code> get called in this program?</strong></p> <p><strong>Why does my window size come small when i have set =200,200.</strong></p>
 

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