Explain about instanceof operator in java?
Instanceof operator is used to test the object is of which type.
Syntax : <reference expression> instanceof <destination type>
Instanceof returns true if reference expression is subtype of destination type.
Instanceof returns false if reference expression is null.
Example : public classInstanceOfExample {public static voidmain(String[] args) {Integer a =
newInteger(5);if (a instanceof java.lang.Integer) {
System.out.println(true);
} else {
System.out.println(false);
}
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}
}
Since a is integer object it returns true.
There will be a compile time check whether reference expression is subtype of destination type. If it is not
a subtype then compile time error will be shown as Incompatible types
