Draw dotted Rect

[Sarone Thach]

Hi there,
The Graphics class has a drawRect method. Does it have a method that will draw a rectangle but with dotted lines?
thanks,
Sarone

[Nathan Pruett]

Not Graphics, but Graphics2D does... As long as you're using any version of the JDK newer than 1.2 you can just cast the Graphics parameter of the paint() method to a Graphics2D object.

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Stroke;
import java.awt.geom.Rectangle2D;
 
import javax.swing.JComponent;
import javax.swing.JFrame;
 
public class DottedRectangle extends JComponent {
public void paintComponent( Graphics og ) {
Graphics2D g = (Graphics2D)og;
Rectangle2D rect = new Rectangle2D.Float( 10, 10, getWidth() - 20, getHeight() - 20 );
float[] dash = { 5F, 5F };
Stroke dashedStroke = new BasicStroke( 2F, BasicStroke.CAP_SQUARE,
BasicStroke.JOIN_MITER, 3F, dash, 0F );
g.fill( dashedStroke.createStrokedShape( rect ) );
}

public static void main( String[] args ) {
JFrame f = new JFrame( "Dotted Rectangle" );
f.getContentPane().add( new DottedRectangle() );
f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
f.setSize( 400, 400 );
f.setLocationRelativeTo( null );
f.setVisible( true );
}
}

[Sarone Thach]

Perfect! Thank you so much Nate.