Use of intern() method in String class

intern() method is present in String class. 

Lets take an example 
String str = new String("abc");
String strComp = "abc";

str.equals(strComp) returns true, because equals method will checks the contents of strings.

But, (str == strComp) returns false, because it will compare the references.
In this case, because we used the new keyword, Java will create a new String object in normal (nonpool) memory, and str will refer to it. In addition, the literal "abc" will be placed in the pool.

If we use intern() 
str = str.intern();

Now the reference of 'str' will change from object outside the string pool to "abc" literal present inside string pool.

After execution (str == strComp) will return TRUE.