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// Shapes.java // Demonstrating some Java2D shapes import javax.swing.*; import java.awt.event.*; import java.awt.*; import java.awt.geom.*; import java.awt.image.*; public class Shapes extends JPanel { public void paint( Graphics g ) { super.paint(g); g.translate(0,-20); // create 2D by casting g to Graphics2D Graphics2D g2d = ( Graphics2D ) g; // draw 2D ellipse filled with a blue-yellow gradient g2d.setPaint( new GradientPaint( 5, 30, // x1, y1 Color.blue, // initial Color 35, 100, // x2, y2 Color.yellow, // end Color true ) ); // cyclic g2d.fill( new Ellipse2D.Double( 5, 30, 65, 100 ) ); // draw 2D rectangle in red g2d.setPaint( Color.red ); g2d.setStroke( new BasicStroke( 10.0f ) ); g2d.draw( new Rectangle2D.Double( 80, 30, 65, 100 ) ); // draw 2D rounded rectangle with a buffered background BufferedImage buffImage = new BufferedImage( 10, 10, BufferedImage.TYPE_INT_RGB ); Graphics2D gg = buffImage.createGraphics(); gg.setColor( Color.yellow ); // draw in yellow gg.fillRect( 0, 0, 10, 10 ); // draw a filled rectangle gg.setColor( Color.black ); // draw in black gg.drawRect( 1, 1, 6, 6 ); // draw a rectangle gg.setColor( Color.blue ); // draw in blue gg.fillRect( 1, 1, 3, 3 ); // draw a filled rectangle gg.setColor( Color.red ); // draw in red gg.fillRect( 4, 4, 3, 3 ); // draw a filled rectangle // paint buffImage onto the JFrame g2d.setPaint( new TexturePaint( buffImage, new Rectangle( 10, 10 ) ) ); g2d.fill( new RoundRectangle2D.Double( 155, 30, 75, 100, 50, 50 ) ); // draw 2D pie-shaped arc in white g2d.setPaint( Color.white ); g2d.setStroke( new BasicStroke( 6.0f ) ); g2d.draw( new Arc2D.Double( 240, 30, 75, 100, 0, 270, Arc2D.PIE ) ); // draw 2D lines in green and yellow g2d.setPaint( Color.green ); g2d.draw( new Line2D.Double( 395, 30, 320, 150 ) ); float dashes[] = { 10 }; g2d.setPaint( Color.yellow ); g2d.setStroke( new BasicStroke( 4, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 10, dashes, 0 ) ); g2d.draw( new Line2D.Double( 320, 30, 395, 150 ) ); } public static void main( String args[] ) { JFrame frame = new JFrame("Drawing 2D shapes" ); JPanel panel = new Shapes(); frame.setSize( 425, 160 ); Container c = frame.getContentPane(); c.add(panel); frame.show(); frame.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } }
// Shapes2.java // Demonstrating a general path import javax.swing.*; import java.awt.event.*; import java.awt.*; import java.awt.geom.*; public class Shapes2 extends JPanel { public void paint( Graphics g ) { super.paint(g); int xPoints[] = { 55, 67, 109, 73, 83, 55, 27, 37, 1, 43 }; int yPoints[] = { 0, 36, 36, 54, 96, 72, 96, 54, 36, 36 }; Graphics2D g2d = ( Graphics2D ) g; // create a star from a series of points GeneralPath star = new GeneralPath(); // set the initial coordinate of the General Path star.moveTo( xPoints[ 0 ], yPoints[ 0 ] ); // create the star--this does not draw the star for ( int k = 1; k < xPoints.length; k++ ) star.lineTo( xPoints[ k ], yPoints[ k ] ); // close the shape star.closePath(); // translate the origin to center of panel Dimension d = getSize(); g2d.translate( d.width/2, d.height/2 ); // rotate around origin and draw stars in random colors for ( int j = 1; j <= 20; j++ ) { g2d.rotate( Math.PI / 10.0 ); g2d.setColor( new Color( ( int ) ( Math.random() * 256 ), ( int ) ( Math.random() * 256 ), ( int ) ( Math.random() * 256 ) ) ); g2d.fill( star ); // draw a filled star } } public static void main( String args[] ) { JFrame frame = new JFrame("Drawing General Path" ); JPanel panel = new Shapes2(); frame.setSize( 300, 300 ); Container c = frame.getContentPane(); c.setBackground( Color.yellow ); c.add(panel); frame.show(); frame.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } }
// Shapes2B.java // Demonstrating a general path import javax.swing.*; import java.awt.event.*; import java.awt.*; import java.awt.geom.*; public class Shapes2B extends JPanel { public void paint( Graphics g ) { super.paint(g); int xPoints[] = { 55, 67, 109, 73, 83, 55, 27, 37, 1, 43 }; int yPoints[] = { 0, 36, 36, 54, 96, 72, 96, 54, 36, 36 }; Graphics2D g2d = ( Graphics2D ) g; // create a star from a series of points GeneralPath star = new GeneralPath(); // set the initial coordinate of the General Path star.moveTo( xPoints[ 0 ], yPoints[ 0 ] ); // create the star--this does not draw the star for ( int k = 1; k < xPoints.length; k++ ) star.lineTo( xPoints[ k ], yPoints[ k ] ); // close the shape star.closePath(); // translate the origin Dimension d = getSize(); g2d.translate( 10, 0 ); // draw the outline g2d.draw(star); g2d.translate(150,0); g2d.fill(star); g2d.translate(-150,150); g2d.setPaint( Color.orange ); Stroke stroke = new BasicStroke( 4, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND); g2d.setStroke(stroke); g2d.draw(star); g2d.translate(150,0); g2d.setPaint( Color.yellow ); g2d.fill(star); g2d.setPaint( Color.blue ); g2d.draw(star); } public static void main( String args[] ) { JFrame frame = new JFrame("General Path Examples" ); JPanel panel = new Shapes2B(); frame.setSize( 300, 300 ); Container c = frame.getContentPane(); c.setBackground( Color.yellow ); c.add(panel); frame.show(); frame.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } }
// Lines.java // Demonstrating various line drawing methods import javax.swing.*; import java.awt.event.*; import java.awt.*; import java.awt.geom.*; public class Lines extends JPanel { public void paint( Graphics g ) { super.paint(g); Graphics2D g2d = ( Graphics2D ) g; Stroke stroke = new BasicStroke( 8,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND); Stroke old_stroke = g2d.getStroke(); g2d.setStroke(stroke); g2d.drawLine(10,70,70,10); g2d.drawString("using drawLine",10,90); g2d.translate(150,0); Line2D.Double line = new Line2D.Double(10,70,70,10); g2d.draw(line ); g2d.drawString("using Line2D shape",10,90); g2d.translate(-150,150); GeneralPath p = new GeneralPath(); p.append(line, false); g2d.draw( p ); g2d.drawString("using GeneralPath",10,90); g2d.translate(150,0); g2d.setStroke(old_stroke); g2d.draw( stroke.createStrokedShape(line)); g2d.drawString("using StrokedShape",10,90); } public static void main( String args[] ) { JFrame frame = new JFrame("Graphics2D Lines" ); JPanel panel = new Lines(); frame.setSize( 300, 300 ); Container c = frame.getContentPane(); panel.setBackground( Color.white ); c.add(panel); frame.show(); frame.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } }
Maintained by John Loomis, last updated 1 June 2000