RCP应用程序的一类常见问题就是对磁盘的低效率映象读取。
A common problem area in RCP applications is inefficient reading of images from disk.
它或者扩展磁盘上的元素以包括添加的字段，或者，如果给定jvm中使用的类定义中不存在这些字段，则忽略它们。
It either expands the elements on disk to include added fields, or, if the fields don't exist in the class definition it is working with in the given JVM, it ignores them.
这个方法现在工作得很好；但是，它现在遵循的是标准类装入委托(缓存、双亲、磁盘)。
This method will now work fine; however, it now follows the standard class loading delegation (cache, parent, disk).
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