1、窗口居中的两种办法
A、centerToScreen();方法
B、 int windowWidth = frame.getWidth(); //获得窗口宽
int windowHeight = frame.getHeight(); //获得窗口高
Toolkit kit = Toolkit.getDefaultToolkit(); //定义工具包
Dimension screenSize = kit.getScreenSize(); //获取屏幕的尺寸
int screenWidth = screenSize.width; //获取屏幕的宽
int screenHeight = screenSize.height; //获取屏幕的高
frame.setLocation(screenWidth/2-windowWidth/2, screenHeight/2-windowHeight/2);//设置窗口居中显示
2、不居中,也就是使用frame.setLocation()来进行调试