stopsign.java

Java程序设计技巧与开发实例附书源代码。

import java.awt.*;

public class StopSign
    extends Canvas {
  private final static int[] X = {
      10, 20, 30, 30, 20, 10, 0, 0};
  private final static int[] Y = {
      0, 0, 10, 20, 30, 30, 20, 10};
  private final static Polygon P = new Polygon(X, Y, X.length);
  private final static Color FILL_COLOR = new Color(200, 0, 0);
  public StopSign() {
    super();
    setBackground(Color.lightGray);
  }

  public Dimension getPreferredSize() {
    return new Dimension(32, 32);
  }

  public void paint(Graphics g) {
    g.setColor(FILL_COLOR);
    g.fillPolygon(P);
    g.setColor(Color.black);
    g.drawPolygon(P);
  }
}