Instanceof accepts null values

During encoding, you are often reminded to avoid null values.

I have no intention of thinking about instanceof today. I tried to find that this operator accepts null values and returns false if a null object is encountered. Nullexceptinexception is not reported.

Perhaps the same, it is not a very obvious class method call. Or the JVM performs special processing on it.

Package com. jfans;

Public class instanceofdemo {

Public static void main (string [] ARGs ){

Object OBJ = NULL;

String S = "Hello, wrold! ";

String STR = NULL;

System. Out. println (s instanceof string );

System. Out. println (STR instanceof string );

System. Out. println (OBJ instanceof object );

}

}

Result:

True

False

False