java - Garbage collection and Strings

Question

I have some doubts regarding Strings

Are they live on Heap or String pool?

And if on Heap then they will be garbage collected, if they are not reachable by any live thread.

And if on String pool then how they will be deleted or removed because as we know Garbage Collection happens only on heap.

Answer 1

String s = new String("abc");

the string object referred by s will be on heap and the string literal "abc" will be in string pool. The objects in the string pool will not be garbage collected. They are there to be reused during the lifetime of the program, to improve the performance.