JDK14/Java14源码在线阅读

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 * version 2 for more details (a copy is included in the LICENSE file that
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package sun.jvm.hotspot.memory;

//These definitions should be kept in sync with the definitions in the HotSpot code.

public enum ReferenceType {
  REF_NONE ("None reference"),       // Regular class
  REF_OTHER ("Other reference"),     // Subclass of java/lang/ref/Reference, but not subclass of one of the classes below
  REF_SOFT ("Soft reference"),       // Subclass of java/lang/ref/SoftReference
  REF_WEAK ("Weak reference"),       // Subclass of java/lang/ref/WeakReference
  REF_FINAL ("Final reference"),     // Subclass of java/lang/ref/FinalReference

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