1、实例化JFrame窗体BlackboardFrame frame;frame=new BlackboardFrame();
2、设置全屏属性frame.setExtendedState(Frame.MAXIMIZED_BOTH);
3、显示窗体frame.setVisible(true);
4、完整代码如下 static BlackboardFrame frame; public static void main(String[] args) { // TODO Auto-generated method stub frame=new BlackboardFrame(); frame.setExtendedState(Frame.MAXIMIZED_BOTH); frame.setVisible(true); }