In C or C++, there is no special method for comparing NULL values. We can use if statements to check whether a variable is null or not .
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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.
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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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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 .
Read moreIs == null in Java?
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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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 empty or size == 0 Java?
To check if an ArrayList is empty, you can use ArrayList. isEmpty() method or first check if the ArrayList is null, and if not null, check its size using ArrayList. size() method. The size of an empty ArrayList is zero .
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