0

我正在尝试使用卡片布局,并且我在顶部有 2 个按钮可以更改卡片,但由于某种原因它不起作用,下一个方法有效,但显示或第一个\最后一个不起作用,当然我不能使用下一个,因为我想要每个按钮都有一张特定的卡片,这是我的代码:

     cards = new CardLayout();
    cardPanel = new JPanel();
    cardPanel.setLayout(cards);
    cards.show(cardPanel, "gapas");

    JPanel firstCard = new JPanel();
    firstCard.setBackground(Color.WHITE);;


    JPanel secondCard = new JPanel();
    secondCard.setBackground(Color.blue);


    cardPanel.add(firstCard, "kalam");
    cardPanel.add(secondCard, "gapan");

    guiFrame.add(tabsPanel,BorderLayout.NORTH);
    guiFrame.add(cardPanel,BorderLayout.CENTER);
    guiFrame.setVisible(true);
}

ActionListener action = new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getActionCommand().matches("kalam")){
            cards.show(cardPanel,"kalam");
            System.out.println("kalam");
        }
        else{
            cards.show(cardPanel, "gapas");
            System.out.println("gapas");
        }

    }
};
4

2 回答 2

0

文档状态: show (Container parent, String name) 使用 addLayoutComponent 方法翻转到具有指定名称的添加到此布局的组件。

您添加两个项目:

  • 卡拉姆
  • 加潘

但你试图展示:gapas。

另外我会先添加,然后尝试 2 显示。

于 2013-10-07T08:24:09.060 回答
0

我想你想要这样的东西。

public class TestCard extends JFrame implements ActionListener {

CardLayout cards;
JPanel cardPanel, tabsPanel;
JButton b1, b2;

public TestCard() {
    b1= new JButton("kalam");
    b2= new JButton("gapas");
    tabsPanel = new JPanel();
    cards = new CardLayout();
    cardPanel = new JPanel();
    cardPanel.setLayout(cards);

    JPanel firstCard = new JPanel();
    firstCard.setBackground(Color.WHITE);


    JPanel secondCard = new JPanel();
    secondCard.setBackground(Color.blue);


    cardPanel.add(firstCard, "kalam");
    cardPanel.add(secondCard, "gapas");
    tabsPanel.add(b1);
    tabsPanel.add(b2);

    add(tabsPanel, BorderLayout.NORTH);
    add(cardPanel, BorderLayout.CENTER);
    b1.addActionListener(this);
    b2.addActionListener(this);
    setSize(800, 600);

    cards.show(cardPanel, "gapas");
    setVisible(true);
}

@Override
public void actionPerformed(ActionEvent e) {
    if (e.getActionCommand().matches("kalam")) {
        cards.show(cardPanel, "kalam");
        System.out.println("kalam");
    } else {
        cards.show(cardPanel, "gapas");
        System.out.println("gapas");
    }
}
public static void main(String[] args) {
    new TestCard();
}
}
于 2013-10-07T08:28:30.400 回答