[ACCEPTED]-What do those strange class names in a java heap dump mean?-jmap
You'll find the complete list documented 13 under Class.getName():
If this class object represents a reference 12 type that is not an array type then the 11 binary name of the class is returned, as 10 specified by the Java™ Language Specification, Second Edition.
If this class object represents 9 a primitive type or void, then the name returned 8 is a
Stringequal to the Java language keyword 7 corresponding to the primitive type or 6 void.If this class object represents a class 5 of arrays, then the internal form of the 4 name consists of the name of the element 3 type preceded by one or more '[' characters 2 representing the depth of the array nesting. The encoding 1 of element type names is as follows:
Element Type Encoding boolean Z byte B char C class or interface Lclassname; double D float F int I long J short S
it is an array of objects as specified by 2 JVM Specifications for internal representation of class names:
- a single [ means an array of
- L followed by a fully qualified class name (e.g. java/lang/Object) is the class name terminated by semicolon ;
so 1 [Ljava.lang.object; means Object[]
The rules are listed in the API doc of Class.getName().
[Ljava.lang.Object; would 3 be an instance of Object[]. Note that multidimensional 2 arrays
are displayed with multiple opening 1 braces.
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