What does square bracket and letter prefix mean in the jmap histogram?
For example: [L and [C below?
The doc https://docs.oracle.com/javase/8/docs/technotes/guides/troubleshoot/tooldescr014.html#BABJIIHH only mention angle bracket which means internal JVM classes.
num #instances #bytes class name
----------------------------------------------
1: 376182087 9028370088 org.joda.time.DateTime
2: 376179680 9028312320 **REDACTED**
3: 655038 2163947376 [Ljava.lang.Object;
4: 1374798 174768304 [C
5: 2595945 62302680 java.lang.String
6: 117265 34652352 [B
7: 242416 25892568 [Ljava.util.HashMap$Node;
8: 76675 20546128 [I
9: 568297 18185504 java.util.HashMap$Node
10: 161383 14201704 java.lang.reflect.Method
11: 590604 14174496 java.util.ArrayList
12: 349188 13967520 java.util.LinkedHashMap$Entry
...truncated...