如何使JFrame在Java中可滚动?

问题描述

我有此代码，试图在其中插入可滚动的面板(JPanel)，但我不明白.这是我的代码:

I have this code in which I am trying to fit a scrollable Panel (JPanel) but I don't get it. Here is my code:

public class Sniffer_GUI extends JFrame {
Canvas c = new Canvas();
ConnectorPropertiesPanel props;
public Sniffer_GUI() {
    super("JConnector demo");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    getContentPane().setLayout(new GridBagLayout());
    init();

    getContentPane().add(new JLabel("Connectors example. You can drag the connected component to see how the line will be changed"),
                         new GridBagConstraints(0, 0, 2, 1, 1, 0, GridBagConstraints.NORTHWEST, GridBagConstraints.HORIZONTAL, new Insets(5, 5, 0, 5), 0, 0));
    getContentPane().add(initConnectors(),
                         new GridBagConstraints(0, 1, 1, 1, 1, 1, GridBagConstraints.NORTHWEST, GridBagConstraints.BOTH, new Insets(5, 5, 5, 5), 0, 0));
    getContentPane().add(props,
                         new GridBagConstraints(1, 1, 1, 1, 0, 1, GridBagConstraints.NORTHWEST, GridBagConstraints.VERTICAL, new Insets(5, 0, 5, 5), 0, 0));
    setSize(800, 600);
    setLocationRelativeTo(null);

}

谢谢.

我编辑添加了一部分似乎可以正常工作的代码...

I edit to add a code that partially seems to work...

public Sniffer_GUI() {
    super("JConnector demo");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel container = new JPanel();
    JScrollPane scrPane = new JScrollPane(container);
    add(scrPane);
    scrPane.setLayout(new ScrollPaneLayout());
    init();

    add(initConnectors());

    setSize(800, 600);
    setLocationRelativeTo(null);

}

但是它仍然不能滚动，至少它使它的功能在JScrollPane内部，是一个很好的步骤.

But it isn't still scrollable, at least it makes its function inside a JScrollPane, is a good step.

推荐答案

使JPanel可滚动并将其用作容器，如下所示:

Make a JPanel scrollable and use it as a container, something like this:

JPanel container = new JPanel();
JScrollPane scrPane = new JScrollPane(container);
add(scrPane); // similar to getContentPane().add(scrPane);
// Now, you can add whatever you want to the container

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