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我希望用戶點擊一個圖像,並且點擊每個圖像的cardlayout更改面板。所以我有一個面板textarea和一個只有一個藍色的背景,當我啓動程序面板textarea顯示沒有textarea,當我點擊圖像顯示藍色面板,爲什麼不能看到textarea?Java cardlayout dosen't show textarea
我已經在代碼
frame = new JFrame("Sandwich deLuxe");
frame.setBounds(100, 100, 741, 522);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
JPanel panel = new JPanel();
panel.setBounds(10, 132, 705, 89);
frame.getContentPane().add(panel);
panel.setLayout(null);
JToolBar toolBar = new JToolBar();
toolBar.setBounds(10, 0, 705, 22);
frame.getContentPane().add(toolBar);
panelCont.setBounds(10, 221, 544, 251);
frame.getContentPane().add(panelCont);
panelCont.setLayout(cl);
JPanel panelTest1 = new JPanel();
JTextArea txtrGhg = new JTextArea();
txtrGhg.setForeground(Color.BLACK);
txtrGhg.setBackground(UIManager.getColor("Button.background"));
txtrGhg.setEditable(false);
txtrGhg.setText("Velkommen til Sandwich deLuxe\r\n\r\nK\u00F8b din mad her!\r\n\r\n1. V\u00E6lg en af kategoriene fra oven.\r\n2. V\u00E6lg dinne retter/sandwichs.\r\n3. Bekr\u00E6ft k\u00F8bet i indk\u00F8bskurven.\r\n4. Din bestilling er modtaget og vi g\u00E5r straks \r\n i gang med at tilberede din mad. ");
txtrGhg.setFont(new Font("Monospaced", Font.PLAIN, 18));
panelTest1.add(txtrGhg);
panelCont.add(panelTest1, "1");
JPanel panelTest2 = new JPanel();
panelTest2.setBackground(Color.BLUE);
panelCont.add(panelTest2,"2");
cl.show(panelCont, "1");
JLabel lblNewLabel = new JLabel("New label");
lblNewLabel.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
cl.show(panelCont, "2");
}
});
lblNewLabel.setIcon(new ImageIcon(""));
lblNewLabel.setBounds(28, 11, 97, 67);
panel.add(lblNewLabel);
JScrollPane scrollBar = new JScrollPane(txtrGhg, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollBar.setViewportBorder(null);
scrollBar.setPreferredSize(new Dimension(300,200));
scrollBar.setBorder(BorderFactory.createEmptyBorder());
panelCont.add(scrollBar, "name_171726698118247");
panelCont.setOpaque(true);
謝謝Holger,那是個問題,現在我試圖讓它與scrollpane一起工作 – user2266381