屏蔽关闭事件

public class Test extends JFrame{
    
    public Test(){
        
        this.setSize(300,200);
        //激活窗口事件  
        this.enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    }
    
    @Override  
    protected void processWindowEvent(WindowEvent e) {  
        if (e.getID() == WindowEvent.WINDOW_CLOSING)  
            return; //直接返回，阻止默认动作，阻止窗口关闭  
        super.processWindowEvent(e); //该语句会执行窗口事件的默认动作(如：隐藏)  
    }  

    public static void main(String[] args) {
        new Test().setVisible(true);
    }
}

最小化可以用以下屏蔽：

public void windowStateChanged(WindowEvent state) {
                 
                if(state.getNewState() == 1 || state.getNewState() == 7) {
                    setExtendedState(JFrame.NORMAL);//恢复正常
                }else if(state.getNewState() == 0) {
                    //System.out.println("窗口恢复到初始状态");
                }else if(state.getNewState() == 6) {
                    //System.out.println("窗口最大化");
                }
            }