Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();// 获得屏幕象素
screenSize.setSize(800, 200);
this.setPreferredSize(screenSize);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();// 获得屏幕象素
screenSize.setSize(800, 200);
this.setPreferredSize(screenSize);