Hi all,
In this post, I’ll demonstrate how
memory behave while string type data involving scenario in our JAVA program.
Basically, when we execute JAVA program on our PC, Java mange PCs main memory
in its own way. For string type operations are handled through following 3type
of memory segments.
- Stack
- Heap
- Pool
String data type is immutable, mean
when changes happen to literals particular literals never change, instead of
that reference variable pointed to new value. This behavior helps to manage
literals which have more than one reference.
When we consider above scenario, step
1 to 4 nameList variable reference to new literals in each step of the loop, at
the same time previous values of literals are reaming inside the pool without
any references, instead of JAVA garbage collector involving to clear pool,
String pool will be full of garbage value.
For mitigate these kind of scenario
JAVA 5 introduces StringBuffer & StringBulider both of the classes are not
immutable. Let’s see how to implement above code segment using StringBuffer
class.
Happy Coding,
Regards,
Denuwan Himanga
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