String handling

• String is an immutable that means we can define string but we can not change.

                            String s1="java smart answers";
                                                                              
                            String s2="java smart answers";

• If two or more string object contents are equal then there will be only one object. From the above, both s1 and s2 referring only one object
• In case of "==" , we will check the reference or hash code of the object.
• In case of equals() method, it will check the content of object, it will returns a boolean value i.e true or false.