Apr 25, 2010 · In Java (tm), "null" is not a keyword, but a special literal of the null type. It can be cast to any reference type, but not to any primitive type such as int or boolean.

Before calling a function of an object, I need to check if the object is null, to avoid throwing a NullPointerException. What is the best way to go about this? I've considered these methods. …

In Java I am told that when doing a null check one should use == instead of .equals(). What are the reasons for this?

If a reference variable is set to null either explicitly by you or through Java automatically, and you attempt to dereference it you get a NullPointerException. The NullPointerException (NPE) …

Dec 7, 2012 · In Java there isn't Null values for primitive Data types. If you need to check Null use Integer Class instead of primitive type. You don't need to worry about data type difference. …

If null is a valid response, you have to check for it. If it's code that you do control, however (and this is often the case), then it's a different story. Avoid using nulls as a response. With …

Oct 12, 2013 · Formally, null is a singleton member of the null type, which is defined to be the subtype of every other Java type. null is a reference type and its value is the only reference …

Because of its commutative property, the only difference between object == null and null == object (the Yoda version) is of cognitive nature: how the code is read and digested by the reader.

In Java, int is a primitive type and it is not considered an object. Only objects can have a null value. So the answer to your question is no, it can't be null. But it's not that simple, because …

As we know int is a primitive data type and cannot be null. In my program i want to do a condition check like int i != "" but it says operator != cannot be applied to int,null.