Can you set an object to null in Java?

Setting an object to null, clears the reference . If there is no longer any reference to that object, as in your first example, the memory can be freed, when the JVM runs the GC (Grarbage Collector) the next time.

Java Check if Object Is Null Using java. One of the methods is isNull() , which returns a boolean value if the provided reference is null, otherwise it returns false .13 Ara 2020

It may however have 0 elements. And objects can’t be null .