Java JScrollPane-多个组件 [英] Java JScrollPane- Multiple components

问题描述

我正在尝试在JScrollPane中添加2个图像。第一个图像是背景，第二个图像与第一个图像重叠。当我运行程序时问题只显示第二张图片！

I'm trying to add 2 images inside the JScrollPane. the first image is a background and the second one overlap the first one. The problem shows only the second image when i run my program!

请帮助

ImageIcon ii = new ImageIcon("mini_map.png");
JLabel label1=new JLabel(ii);

Icon icon = new ImageIcon("Mg.gif");
JLabel label2 = new JLabel(icon);

JScrollPane jsp=new JScrollPane();

jsp.getViewport().add(label1);
jsp.getViewport().add(label2 );

推荐答案

JViewport是一个单子容器，你可以'添加两个组件。

JViewport is a single-child container, you can't add two components.

要在任何容器中实现重叠（即z方向的堆栈组件），您主要是自己构建的，内置的 - 支持很差。要么必须在LayeredPane中管理它们（如前所述）或尝试OverlapLayout

To achieve an overlap (that is stack components in z-direction) in any container, you'r mostly on your own, the built-in support is poor. Either have to manage them in LayeredPane (as mentioned already) or try OverlapLayout

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