Core Java - Null keyword

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Null keyword

Is null a keyword? if not what is it?

Total Answers and Comments: 8

Last Update: August 17, 2009 Asked by: gkumawat

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Submitted by: interviewprep9

Capital N, Null is not a keyword or a reserved word.

All small letters, null is not a keyword either. but, it's a reserved word. you cannot use null as follows:

String null = "a";

null means that a reference is not pointing to any object.

Above answer was rated as good by the following members:
timmireddy, pravinsharma, tanzeem khan, raghu.emails, roger30

June 14, 2008 13:47:17

interviewprep9

Member Since: June 2008 Contribution: 10

RE: Null keyword

Capital N Null is not a keyword or a reserved word.

All small letters null is not a keyword either. but it's a reserved word. you cannot use null as follows:

String null "a";

null means that a reference is not pointing to any object.

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June 15, 2008 08:39:14

vegetto

Member Since: June 2008 Contribution: 10

RE: Null keyword

Null is not a keyword but

null is a keyword but it is not a good programming practise that u use variavles that

may be close to some keywords .

Null is a variable that can hold any of the value;
while null means nothing or empty;
it is used to specify the objects that do not point anything
eg:
Myclass ob null; //null object
or String s1 null;

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June 16, 2008 16:45:42

Uma Sundar

Member Since: June 2008 Contribution: 2

RE: Null keyword

Null is not a keyword.Null is a default value for all type of reference variables.Null means "nothing" in a specified variable.

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June 25, 2008 06:04:54

s.sachin11

Member Since: June 2008 Contribution: 1

RE: Null keyword

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. The null literal doesn't necessarily have value zero. And it is impossible to cast to the null type or declare a variable of this type.

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July 17, 2008 06:55:57

timmireddy

Member Since: May 2008 Contribution: 17

RE: Null keyword

Null is not a keyword but this is a special string literal of null type means there is no specific use of null.If u use null as an reference it won't work JVM shows it's not a statement.

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August 03, 2008 01:43:43

er.mukesh_208

Member Since: May 2008 Contribution: 3

RE: Null keyword

null is neither keyword nor any special literial. It is only a reserved word.

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September 13, 2008 09:14:03

varmasuman

Member Since: September 2008 Contribution: 1

RE: Null keyword

Null means showing nothing

Whenever one object reference refers null i.e

ServletConfig application null;

Then there is nothing in the object reference application.

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August 17, 2009 10:37:57

Sarje

Member Since: August 2009 Contribution: 62

RE: Null keyword

Null is not a keyword but null is reserved literal. null is the default value for instance variable.
String str null;
means instance variable str does not hold reference of any object.

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