java - java堆转储中那些奇怪的类名是什么意思？

Question

我正在尝试使用 jmap 追踪 java 进程中的内存泄漏。和 jhat .每次我这样做时，我都会看到特定对象类型的那些奇怪的符号，例如字符串数组的 [S 和字符数组的 [C。我不记得是什么意思，而且很难用谷歌搜索这些东西。

(EDIT:为了证明我的观点，事实证明 [S 是 short 数组，而 [C 是 char 数组。 )

有人愿意制作一张表格，列出所有不同的类名及其含义吗？或者指点我这张 table ？

具体来说，我想知道 [Ljava.lang.Object; 是什么意思。

Answer 1

您可以在 Class.getName() 下找到完整列表。 :

If this class object represents a reference type that is not an array type then the binary name of the class is returned, as specified by the Java™ Language Specification, Second Edition.

If this class object represents a primitive type or void, then the name returned is a String equal to the Java language keyword corresponding to the primitive type or void.

If this class object represents a class of arrays, then the internal form of the name consists of the name of the element type preceded by one or more '[' characters representing the depth of the array nesting. The encoding of element type names is as follows:

Element Type        Encodingboolean             Zbyte                Bchar                Cclass or interface  Lclassname;double              Dfloat               Fint                 Ilong                Jshort               S