swing中设置JFrame的大小占满屏幕

JFrame parentFrame=new JFrame();Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();Insets screenInsets=Toolkit.getDefaultToolkit().getScreenInsets(parentFrame.getGraphicsConfiguration());final Rectangle frameBounds=new Rectangle(screenInsets.left, screenInsets.top, screenSize.width-screenInsets.left-screenInsets.right, screenSize.height-screenInsets.top-screenInsets.bottom);//sets the bounds of the main frameparentFrame.setBounds(frameBounds);