在哪里可以找到有关此类的信息？通过阅读 OpenJDK 源代码……任何人都可以免费下载。（以下内容来自Java 8源码。）该类的注释最少，但它扩展了sun.java2d.SurfaceDatawhose javadoc 注释块这样说：/** * This class provides various pieces of information relevant to a * particular drawing surface. The information obtained from this * object describes the pixels of a particular instance of a drawing * surface and can only be shared among the various graphics objects * that target the same BufferedImage or the same screen Component. * <p> * Each SurfaceData object holds a StateTrackableDelegate object * which tracks both changes to the content of the pixels of this * surface and changes to the overall state of the pixels - such * as becoming invalid or losing the surface. The delegate is * marked "dirty" whenever the setSurfaceLost() or invalidate() * methods are called and should also be marked "dirty" by the * rendering pipelines whenever they modify the pixels of this * SurfaceData. * <p> * If you get a StateTracker from a SurfaceData and it reports * that it is still "current", then you can trust that the pixels * have not changed and that the SurfaceData is still valid and * has not lost its underlying storage (surfaceLost) since you * retrieved the tracker. */由此看来，似乎sun.awt.image.BufImgSurfaceData涉及到对一个BufferedImage对象进行绘制操作，以及相关联的东西。（这是相当高的水平，但它应该足以让您弄清楚这是否与您的性能问题相关。我怀疑它不是，除非有很多对象的“流失”。BufferedImage）