Java Game Development(25) - Creating a Core Class

創建新類Core.java

import java.awt.*;

import javax.swing.*;

public abstract class Core {

private static DisplayMode modes[] = {

new DisplayMode(800,600,32,0),

new DisplayMode(800,600,24,0),

new DisplayMode(800,600,16,0),

new DisplayMode(640,480,32,0),

new DisplayMode(640,480,24,0),

new DisplayMode(640,480,16,0),

};

private boolean running;

protected ScreenManager s;

//停止運行

public void stop(){

running = false;

}

//調用INIT和gameloop

public void run(){

try{

init();

gameloop();

}finally{

s.restoreScreen();

}

}

//設置全屏

public void init() {

s = new ScreenManager();

DisplayMode dm = s.findFirstCompatibleMode(modes);

s.setFullScreen(dm);

Window w = s.getFullScreenWindow();

w.setFont(new Font("Arial", Font.PLAIN, 20));

w.setBackground(Color.GREEN);

w.setForeground(Color.WHITE);

running = true;

}

//主遊戲循環

public void gameloop() {

long startTime = System.currentTimeMillis();

long cumTime = startTime;

while (running) {

long timePassed = System.currentTimeMillis() - cumTime;

cumTime += timePassed;

update(timePassed);

Graphics2D g = s.getGraphics();

draw(g);

g.dispose();

s.update();

try {

Thread.sleep(20);

} catch (Exception ex) {}

}

}

}