Go语言视频零基础入门到精通

javalearner

全屏幕显示程序，可以用来做屏幕保护，程序保护程序.

1. import java.awt.Color;
   
2. import java.awt.DisplayMode;
   
3. import java.awt.Frame;
   
4. import java.awt.Graphics;
   
5. import java.awt.GraphicsDevice;
   
6. import java.awt.GraphicsEnvironment;
   
7. import java.awt.Rectangle;
   
8. import java.awt.image.BufferStrategy;
   
9. /**
   
10. *
    
11. * @author fubin www.cujava.com
    
12. * 这是全屏幕显示模块.但是这个程序消耗资源比较多。
    
13. */
    
14. public class FullScreen {
    
15. private static int counter = 0;
    
16. private static final int MAX = 50;
    
17. private static DisplayMode MODES[] = new DisplayMode[] {
    
18.      new DisplayMode(640, 480, 32, 0), new DisplayMode(640, 480, 16, 0),
    
19.      new DisplayMode(640, 480, 8, 0) };
    
20. private static DisplayMode getBestDisplayMode(GraphicsDevice device) {
    
21.    for (int x = 0, xn = MODES.length; x < xn; x++) {
    
22.      DisplayMode[] modes = device.getDisplayModes();
    
23.      for (int i = 0, in = modes.length; i < in; i++) {
    
24.        if (modes[i].getWidth() == MODES[x].getWidth()
    
25.            && modes[i].getHeight() == MODES[x].getHeight()
    
26.            && modes[i].getBitDepth() == MODES[x].getBitDepth()) {
    
27.          return MODES[x];
    
28.        }
    
29.      }
    
30.    }
    
31.    return null;
    
32. }
    
33. public static void main(String args[]) {
    
34.    GraphicsEnvironment graphicsEnvironment = GraphicsEnvironment
    
35.        .getLocalGraphicsEnvironment();
    
36.    GraphicsDevice graphicsDevice = graphicsEnvironment
    
37.        .getDefaultScreenDevice();
    
38.    DisplayMode originalDisplayMode = graphicsDevice.getDisplayMode();
    
39.    try {
    
40.      Frame frame = new Frame();
    
41.      frame.setUndecorated(true);
    
42.      frame.setIgnoreRepaint(true);
    
43.      graphicsDevice.setFullScreenWindow(frame);
    
44.      if (graphicsDevice.isDisplayChangeSupported()) {
    
45.        graphicsDevice
    
46.            .setDisplayMode(getBestDisplayMode(graphicsDevice));
    
47.      }
    
48.      frame.createBufferStrategy(2); // 2 buffers
    
49.      Rectangle bounds = frame.getBounds();
    
50.      BufferStrategy bufferStrategy = frame.getBufferStrategy();
    
51.      while (!done()) {
    
52.        Graphics g = null;
    
53.        try {
    
54.          g = bufferStrategy.getDrawGraphics();
    
55.          if ((counter <= 2)) { // 2 buffers
    
56.            g.setColor(Color.CYAN);
    
57.            g.fillRect(0, 0, bounds.width, bounds.height);
    
58.          }
    
59.          g.setColor(Color.RED);
    
60.          // redraw prior line, too, since 2 buffers
    
61.          if (counter != 1) {
    
62.            g.drawLine(counter - 1, (counter - 1) * 5,
    
63.                bounds.width, bounds.height);
    
64.          }
    
65.          g.drawLine(counter, counter * 5, bounds.width,
    
66.              bounds.height);
    
67.          bufferStrategy.show();
    
68.        } finally {
    
69.          if (g != null) {
    
70.            g.dispose();
    
71.          }
    
72.        }
    
73.        try {
    
74.          Thread.sleep(250);
    
75.        } catch (InterruptedException ignored) {
    
76.        }
    
77.      }
    
78.    } finally {
    
79.      graphicsDevice.setDisplayMode(originalDisplayMode);
    
80.      graphicsDevice.setFullScreenWindow(null);
    
81.    }
    
82.    System.exit(0);
    
83. }
    
84. private static boolean done() {
    
85.    return (counter++ == MAX);
    
86. }
    
87. }
    

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源码下载：http://file.javaxxz.com/2014/11/5/235609734.zip