num #instances #bytes class name
----------------------------------------------
1: 29213 129250632 [B
2: 31358 25795944 [I
3: 181179 18582112 [C在使用jmap -histo指令查看对象占用的时候经常会看到[C [S [I [B [[I这些,他们分别代表着
[C is char[]
[S is short[]
[I is int[]
[B is byte[]
[[I is int[][]
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