When or how thrashing or physical dump memory error occurs in java programming?

Question

Design an algorithm to accept a string from the user. Count and print the number of times each character occurs in the given string. Example –
input string = "malayalam"
Output must be –
m – 2
a – 4
l – 2
y - 1

Answer 1

You can use the jmap tool provided with java installation to acquire the memory dump.

Command is something similar to,

jmap -dump:live,format=b,file=heap.bin

Here I have passed some parameter to the jmap command.

live – Only get dump for live objects.
format=b – Format of the output file should be binary.
file=heap.bin – Name of the dump file.

Read more: http://docs.oracle.com/javase/7/docs/technotes/tools/share/jmap.html.