Is null check needed before calling instanceof?
Web Technologies Web Development 2 years ago
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Best Answer
2 years ago
_x000D_ No, a null check is not needed before using instanceof. The expression x instanceof SomeClass is false if x is null. From the Java Language Specification, section 15.20.2, "Type comparison operator instanceof": "At run time, the result of the instanceof operator is true if the value of the RelationalExpression is not null and the reference could be cast to the ReferenceType without raising a ClassCastException. Otherwise the result is false." So if the operand is null, the result is false.