Unusual Methods In Java

java.lang.String.intern():

When the intern method is invoked, if the pool already contains a string equal to this String object as determined by the equals(Object) method, then the string from the pool is returned. Otherwise, this String object is added to the pool and a reference to this String object is returned.

intern() method on java.lang.String. new String("Hello").intern() == new String("Hello").intern() returns true, whereas without the intern() calls it returns false.

All constant strings that appear in a class are automatically interned. so intern strings when they are not constant.