Typically, you’ll check for null using the triple equality operator ( === or !== ) , also known as the strict equality operator, to be sure that the value in question is definitely not null: object !== null . That code checks that the variable object does not have the value null .
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No , null is not an object .It is a reference type and its value does not refer to any object and so there is no representation of null in memory.
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isNotEmpty(String) : It tests if the String is null or empty (” ” is not empty) StringUtils. isBlank(String) / StringUtils. isNotBlank(String) : Same as isEmpty bt if the String is only whitespace it is considered blank.
Read moreIS null check in Java?
Use “==” to check a variable’s value . If you set a variable to null with “=” then checking that the variable is equal to null would return true. variableName == null; You can also use “!= ” to check that a value is NOT equal.
Read moreHow do you check if an object is null?
To check if it is null, we call the isNull() method and pass the object getUserObject as a parameter . It returns true as the passed object is null.
Read moreIs object null in 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 .
Read moreHow do I use isNull in Java?
Java isNull method with Examples
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