String

• String is immutable.(once a value is assigned to a string object, it cannot be changed).
• String can be instantiated through Constructor or explicitly.
• If the String is instantiated explicitly, it is loaded in Intern pool (Special memory in heap).
• Eg:  String str1="Hello";   String str2="Hello"; //No duplications (Loads in InternPool)

• When multiple String variables are assigned a same string value explicitly, all variables will share one string object loaded in the Intern Pool.

• If the String is instantiated through Constructor or any method of string will be loaded in the Heap (not in Intern Pool) 
• Eg:  String str1=new String("Hello"); //Have duplications (Loads in Heap)

Note: To see all the contents of String class, type "javap java.lang.String" in cmd.