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static imports  j2SE 5.0

Posted on 2013-11-25
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Last Modified: 2013-12-02
Hi,

What are advantages, practical uses of
static imports introduced in j2SE 5.0.


please advise
Any links resources ideas highly appreciated. Thanks in advance
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Question by:gudii9
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3 Comments
 
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dpearson earned 2000 total points
ID: 39676165
It just saves typing when you are working with static methods/values in a class:

Java 4:
import java.lang.* ;

double pi = Math.PI ;    // Each time I reference "PI" need to add "Math." to the front
double area = Math.PI * Math.PI * radius ;

Java 5:
import static java.lang.Math.*;

double pi = PI ;    // No need for Math. here any more
double area = PI * PI * radius ;

Doug
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Author Comment

by:gudii9
ID: 39682148
Java 4:
import java.lang.* ;

double pi = Math.PI ;    // Each time I reference "PI" need to add "Math." to the front

why we need to refer Math every time in java 4? and how it got fixed in java 5. Please advise
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LVL 28

Expert Comment

by:dpearson
ID: 39682437
why we need to refer Math every time in java 4? and how it got fixed in java 5. Please advise

In Java 4 that's just the way you had to write code to refer to a static value.  In Java 5 they added a new import statement so you didn't have to do it the old way.

That's really all there is to it.

Doug
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