21天学通C 光盘代码

import java.awt.*; import java.awt.geom.*; public class DrawingTest extends Frame { Shape shapes[] = new Shape[4]; public DrawingTest (String title) { super(title); setSize(500, 400); drawShapes(); add("Center", new MyCanvas()); } public static void main(String args[]) { DrawingTest app = new DrawingTest("Drawing test"); app.show(); } void drawShapes () { shapes[0] = new Rectangle2D.Double(12.0,12.0, 98.0, 120.0); shapes[1] = new Ellipse2D.Double(150.0, 150.0,90.0,30.0); shapes[2] = new RoundRectangle2D.Double(200.0, 25, 235.0, 250.0, 50.0, 100.0); GeneralPath path = new GeneralPath(new Line2D.Double(100.0, 350.0, 150.0, 300.0)); path.append(new Line2D.Double(150.0, 300.0, 200.0, 350.0), true); path.append(new Line2D.Double(200.0, 350.0, 250.0, 300.0), true); path.append(new Line2D.Double(250.0, 300.0, 300.0, 350.0), true); shapes[3] = path; } class MyCanvas extends Canvas { public void paint(Graphics graphics) { Graphics2D gr = (Graphics2D) graphics; for (int i=0; i<4; i++) gr.draw(shapes[i]); } } }