stroke_canvas.java

本光盘是《J2ME无线移动游戏开发》一书的配套光盘

package ch05;

import java.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;

public class Stroke_Canvas
    extends GameCanvas {

  public Stroke_Canvas() throws IOException {
    super(true);
    setTitle("绘制风格实例");
    render(getGraphics());
    //输出缓存中的图像
    flushGraphics();
  }

  private void render(Graphics g) {

    //变量w和h为模拟器的当前屏幕宽度和高度
    int w = getWidth();
    int h = getHeight();

    //填充整个屏幕的背景色为黑色
    g.setColor(0x000000);
    g.fillRect(0, 0, w, h);

    g.setColor(0xffffff);
    try {
      g.setStrokeStyle(Graphics.DOTTED);
    }
    catch (IllegalArgumentException e) {
      System.out.print(e.getMessage());
    }
    g.drawLine(w / 8, h / 8, w - w / 8, h / 8);
    g.drawRect(w / 8, h / 4, w - w / 4, h / 4);
    g.drawRoundRect(w / 8, h / 2 + h / 8, w - w / 4, h / 4, w / 6, h / 6);

  }
}