java - JSeparator 不会与 GridBagLayout 一起显示

Question

我想使用 GridBagLayout 在两个组件之间添加一个垂直的 JSeparator。我的代码如下:

public MainWindowBody(){
    setLayout(new GridBagLayout());

    JPanel leftPanel = new InformationPanel();
    JPanel rightPanel = new GameSelectionPanel();

    JSeparator sep = new JSeparator(JSeparator.VERTICAL);
    GridBagConstraints gbc = new GridBagConstraints();

    gbc.gridx = 0;
    gbc.gridy = 0;
    gbc.anchor = GridBagConstraints.NORTH;

    add(leftPanel,gbc);

    gbc.gridx = 1;
    gbc.gridy = 0;
    gbc.fill = GridBagConstraints.VERTICAL;

    add(sep,gbc);

    gbc.gridx = 2;
    gbc.gridy = 0;
    gbc.fill = GridBagConstraints.NONE;

    add(rightPanel,gbc);
}

但是 JSeperator 没有显示，有什么想法吗？

谢谢

Answer 1

您可以尝试设置分隔符的首选宽度:

sep.setPreferredSize(new Dimension(5,1));

然后，让 GridBagLayout 用完分隔符的所有可用高度:

gbc.fill = GridBagConstraints.VERTICAL;
gbc.weighty = 1;