Question

我在Java中有一个应用程序，在JFrame内的LayeredPane中有2个JPanel。当我调整窗框尺寸时，所有面板都会根据其组件调整大小。这是我调整大小的函数的代码：

 mainFrame.addComponentListener(new ComponentListener() {

        @Override
        public void componentShown(ComponentEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void componentResized(ComponentEvent e) {
            // Resize components of JFrame to fit new size
            int width = e.getComponent().getWidth();
            int height = e.getComponent().getHeight();

            if(containerJPanel != null) {
                containerJPanel.setBounds(0, 0, 
                        width-DEFAULT_PANEL_MINUS_WITDH, height-DEFAULT_PANEL_MINUS_HEIGHT);
                containerJPanel.setPreferredSize(new Dimension(width-DEFAULT_PANEL_MINUS_WITDH, height-DEFAULT_PANEL_MINUS_HEIGHT));

            }


            if(mainJPanel != null) {
                mainJPanel.setBounds(0, 0, 
                        width-DEFAULT_PANEL_MINUS_WITDH, height-DEFAULT_PANEL_MINUS_HEIGHT);
                mainJPanel.setPreferredSize(new Dimension(width-DEFAULT_PANEL_MINUS_WITDH, height-DEFAULT_PANEL_MINUS_HEIGHT));
            }


            if(loadingPanel != null) {
                loadingPanel.setBounds(0, 0, 
                        width-DEFAULT_PANEL_MINUS_WITDH, height-DEFAULT_PANEL_MINUS_HEIGHT);
                loadingPanel.setPreferredSize(new Dimension(width-DEFAULT_PANEL_MINUS_WITDH, height-DEFAULT_PANEL_MINUS_HEIGHT));
            }

        }

        @Override
        public void componentMoved(ComponentEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void componentHidden(ComponentEvent e) {
            // TODO Auto-generated method stub

        }
    });

以下是变量定义：

 /** Main frame **/

 mainFrame = new JFrame();
 mainFrame.setBounds(100,100,DEFAULT_WINDOW_WIDTH,DEFAULT_WINDOW_HEIGHT);
 mainFrame.setPreferredSize(new Dimension(DEFAULT_WINDOW_WIDTH, DEFAULT_WINDOW_HEIGHT));
 mainFrame.getContentPane().setLayout(new BorderLayout(0, 0));
 containerJPanel = new JLayeredPane();


 mainFrame.getContentPane().add(containerJPanel, BorderLayout.CENTER);
 containerJPanel.setBounds(0,0,
                    DEFAULT_WINDOW_WIDTH-DEFAULT_PANEL_MINUS_WITDH, DEFAULT_WINDOW_HEIGHT-DEFAULT_PANEL_MINUS_HEIGHT);


 /** Main Panel **/
 mainJPanel = new JPanel();
 mainJPanel.setBounds(0,0,
                    DEFAULT_WINDOW_WIDTH-DEFAULT_PANEL_MINUS_WITDH, DEFAULT_WINDOW_HEIGHT-DEFAULT_PANEL_MINUS_HEIGHT);
 containerJPanel.add(mainJPanel, new Integer(0), 0);
 /** Loading Panel **/
 loadingPanel = new JPanel();
 containerJPanel.add(loadingPanel, new Integer(1), 0);

 loadingPanel.setBounds(0,0,
                    DEFAULT_WINDOW_WIDTH-DEFAULT_PANEL_MINUS_WITDH, DEFAULT_WINDOW_HEIGHT-DEFAULT_PANEL_MINUS_HEIGHT);
 loadingPanel.setLayout(new BorderLayout(0, 0));
 loadingPanel.setOpaque(false);

关键是要有两个面板，这样一个面板一次可见。我确定我做错了什么，但我无法实现它！谢谢你的帮助。

Answer 1

正如c0der所说：请参阅使用CardLayout的示例。

调整窗口大小

1 个答案: