Answer Posted / vijayakumar chinnasamy

String :
1.Content does not change –immutable

2.final class (cant subclass)

3.compareTo() - compare the string
result : < , > , = --- dictionary order

4.reverse() not available

5.is not thread safe

Criteria to choose among String
If your text is not going to change use a string Class
because a String object is immutable.



StringBuffer:

1. Content can be change Mutable

2.Final class.

3. compareTo() Not available


4.reverse() available

Allocates room for 16-addition character space when no
specific length is specified.

5.is thread safe

Criteria to choose StringBuffer

If your text can changes, and will be accessed from
multiple threads, use a StringBuffer because StringBuffer is
synchronous

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