1. When parseInt ()
method can be used?
This method is used to get the primitive data
type of a certain String.
2. Why is String class
considered immutable?
The String class is immutable, so that once it
is created a String object cannot be changed. Since String is immutable it can
safely be shared between many threads, which is considered very important for
multithreaded programming.
3. Why is StringBuffer
called mutable?
The String class is considered as immutable, so
that once it is created a String object cannot be changed. If there is a
necessity to make a lot of modifications to Strings of characters then
StringBuffer should be used.
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