null is nothing but internal Pointer with value zero. So it is comparing two references having value zero. In fact object. ReferenceEquals(null, null) is always true because of this fact so you do not need the second check.
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Using equals() method of the Object class In the same way the equals() method of the object class accepts two String values and returns a boolean value, which is true if both are equal (or, null) and false if not.
Read moreCan null == null in Java?
println(“(Object)string == number: ” + ((Object)string == number)); To conclude this post and answer the titular question Does null equal null in Java? the answer is a simple yes .31 Eki 2018
Read moreIs object null Java?
Is null an Object in Java? No it’s not , and for those who wonder why such a question, there are languages where null is indeed an object like any, for example Ruby. In Scala, which is very meticulous about types, there is a type Null (a trait, actually) having a single instance null .
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7. == and != The comparison and not equal to operators are allowed with null in Java . This can made useful in checking of null with objects in java.
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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.
Read moreWhat happens if object is null in Java?
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
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