The operators are pretty much the same as in the C language. The common ones are:
+
(add)

(subtract)
*
(multiply)
/
(divide)
%
(modulus)
!
(not)
&&
(and)

(or)
^
(exclusiveor)
==
(numeric identity)
!=
(numeric nonidentity)
<
(less than)
>
(greater than)
<=
(less than or equal)
>=
(greater than or equal)
&
(and)

(or)
^
(exclusiveor)
<<
(left shift)
>>
(right shift)
>>>
(logical right shift)
(byte)
(numeric > signed byte)
(short)
(numeric > 2byte integer)
(int)
(numeric > 4byte integer)
(long)
(numeric > 8byte integer)
(float)
(numeric > 4type floating point)
(double)
(numeric > 8byte floating point)
+
(string concatenation)
[]
(array dereferencing  first element is zero)
?:
(conditional switch)
instanceof
(class membership)