Swing Java 1.2. Swing一些底层类使用AWT的Component、Container、Window等类，可能是为了保持与AWT兼容，方便大家将代码移植到Swing上. Swing不再沿用Peer对等模式来实现GUI界面，完全基于Java自绘制图形实现。

java.lang.Object java.awt.Component java.awt.Container javax.swing.JComponent; The base class for all Swing components except top-level containers. To use a component that inherits from JComponent, ...