To compare Strings for equality, don't use ==. The == operator
checks to see if two objects are exactly the same object.
Two strings may be different objects, but have the same value (have
exactly the same characters in them). Use the .equals() method to compare strings
for equality. Similarly, use the .compareTo() method to test for unequal comparisons.
String s = "something", t = "maybe something else";
if (s == t) // Legal, but usually WRONG.
if (s.equals(t)) // RIGHT
if (s > t) // ILLEGAL
if (s.compareTo(t) > 0) // CORRECT>