Final answer:
The === and <- symbols are not operators in Java. Instead, Java uses == as the equality operator, and <- is not recognized in the language.
Step-by-step explanation:
In Java programming, operators are special symbols that perform specific operations on one, two, or three operands, and then return a result. Among the options listed, -- (decrement), || (logical OR), ! (logical not), != (not equal to), -= (minus equal, which is a shorthand for subtraction assignment), and <= (less than or equal to) are valid Java operators.
The options that are NOT Java operators are === and <-. In Java, === is not used; instead, == is the equality operator. The <- is also not an operator in Java.