Java:在另一个组件上设置一个组件 [英] Java : set a Component on top of another

问题描述

我正在用Java编写程序.我有一个主JPanel，上面有两个JPanel和一个Canvas.我的目标是在运行程序时调整Canvas的大小.当我最大化画布时，我希望它始终位于其他组件的顶部.
如何为我的Canvas设置此属性?

I am writing a program in java. I have a main JPanel that has two JPanel and one Canvas added on it. I aim to resize the Canvas while running the program. When I maximized the Canvas i want it to be always on top of the other component.
How can I set this property for my Canvas?

推荐答案

您可以将主JPanel替换为JLayeredPanel.分层面板可让您指定某些子组件应位于其他子组件之上.

You could replace your main JPanel with a JLayeredPanel. A layered panel will let you specify that some child components should be layered above other child components.

即:

    JLayeredPane pane = new JLayeredPane();

    JLabel ontop = new JLabel("On top");
    JLabel behind = new JLabel("Behind");

    pane.add(ontop, 2, 0);
    pane.add(behind, 1, 0);

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