The Java Developers Almanac 1.4

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e586. Drawing Simple Shapes

There are two ways to draw basic shapes like circles, ovals, lines, arcs, squares, rectangles, rounded rectangles, and polygons. The first is to use specific drawing methods like Graphics.drawOval(). This example uses these methods. The second is to construct a shape and then use Graphics2D.draw() to draw the shape. See the java.awt.geom package for examples that create shapes.

    // See e575 The Quintessential Drawing Program
    public void paint(Graphics g) {
        Graphics2D g2d = (Graphics2D)g;
    
        g2d.drawLine(x1, y1, x2, y2);
        g2d.drawOval(x, y, w, h);
        g2d.drawRect(x, y, w, h);
    
        // A start angle of 0 represents a 3 o'clock position, 90 represents a 12 o'clock position,
        // and -90 (or 270) represents a 6 o'clock position
        int startAngle = 45;
        int arcAngle = -60;
        g2d.drawArc(x, y, w, h, startAngle, arcAngle);
    
        g2d.drawRoundRect(x, y, w, h, arcWidth, arcHeight);
    
        Polygon polygon = new Polygon();
        polygon.addPoint(x, y);
        // Add more points...
        g2d.drawPolygon(polygon);
    }

Related Examples

e587. Filling Basic Shapes
e588. Creating a Shape from a Stroked Shape
e589. Stroking or Filling a Shape
e590. Drawing a Pie Chart

See also: Colors Components Containers Cursors Drawing Events Focus Frames GridBagLayout Images Simulating Events Text The Screen

© 2002 Addison-Wesley.