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Judul : What Is Static Import Inwards Coffee V Alongside Example
link : What Is Static Import Inwards Coffee V Alongside Example

What Is Static Import Inwards Coffee V Alongside Example

Static import inwards Java allows to import static members of flat in addition to piece of work them, every bit they are declared inwards the same class. Static import is introduced inwards Java v along alongside other features similar Generics, Enum, Autoboxing in addition to Unboxing in addition to variable declaration methods. Many programmer intend that using static import tin reduce code size in addition to allow y'all to freely piece of work static champaign of external flat without prefixing flat lift on that. For instance without static import y'all volition access static constant MAX_VALUE of Integer flat every bit Integer.MAX_VALUE but past times using static import y'all tin import Integer.MAX_VALUE in addition to refer it every bit MAX_VALUE. Similar to regular import statements, static import too allows wildcard * to import all static members of a class. In side past times side department nosotros volition come across Java plan to demonstrate How to piece of work static import statements to import static fields.

Static import instance inwards Java

In this static import example, nosotros accept imported constants Integer.MAX_VALUE in addition to Integer.MIN_VALUE statically in addition to printing in that place value without prefixing class name on that.

package test;
import static java.lang.Integer.MAX_VALUE;
import static java.lang.Integer.MIN_VALUE;
/**
 *
 * Java plan to demonstrate How to piece of work static import inwards Java 5
 * By using static import y'all tin piece of work static champaign of external class
 * every bit they are declared inwards same class.
 *
 * @author Javin Paul
 */
public class StaticImportExample {

    public static void main(String args[]) {
     
       //without Static import
        System.out.println("Maximum value of int variable inwards Java without " +  

                            "static import : "  + Integer.MAX_VALUE);
        System.out.println("Minimum value of int variable inwards Java without " +

                            static import : " + Integer.MIN_VALUE);
     
        //after static import inwards Java 5
        System.out.println("Maximum value of int variable using " +

                            static import : " + MAX_VALUE);
        System.out.println("Minimum value of int variable using" +

                            static import : " + MIN_VALUE);
    }
}

Output:
Maximum value of int variable inwards Java without static import : 2147483647
Minimum value of int variable inwards Java without static import : -2147483648
Maximum value of int variable using static import : 2147483647
Minimum value of int variable using static import : -2147483648

If y'all expression at import statements import static java.lang.Integer.MAX_VALUE, its written every bit import static rather than static import, thus simply beware of that. We are non using * wildcard hither in addition to importing alone selected static fellow member but y'all tin too piece of work import static java.lang.Integer.* to import all static fields inwards i go.

Advantages of Static Import inwards Java

Main wages of using static import inwards Java is saving keystrokes. If y'all are often using System.out.println() statements in addition to tried of typing it, y'all tin static import System.out or System.* in addition to later on y'all tin type out.println() inwards your code, Though I would advise to piece of work this Eclipse shortcut to generate System.out.println statement which is much faster than static import. This is the form of usage I come across i tin create goodness from static import, other than that static import is simply extension of regular import declaration inwards Java. Similar to static champaign y'all tin too import static method inwards your class, to a greater extent than often than non inwards instance of Utility classes.

Drawback of Static Import inwards Java

Many Java programmer fighting against static import alongside argue that it reduces readability in addition to goes against how static champaign should hold upwards used i.e. prefixed alongside flat lift e.g. Integer.MAX_VALUE. Static import has approximately other drawback inwards damage of conflicts, in i lawsuit y'all static import Integer.MAX_VALUE y'all tin non piece of work MAX_VALUE every bit variable inwards your programmer, compiler volition throw error. Similarly if y'all static import both Integer.MAX_VALUE in addition to Long.MAX_VALUE in addition to refer them inwards code every bit MAX_VALUE, y'all volition larn next compile time fault :

java.lang.ExceptionInInitializerError

Caused by: java.lang.RuntimeException: Uncompilable origin code - MAX_VALUE is already defined inwards a static single-type import 

        at test.StaticImportExample.(StaticImportExample.java:6)

        Could non notice the principal class: test.StaticImportExample.  Program volition exit.

        Exception inwards thread "main" Java Re

Summary

Finally few points worth remembering well-nigh static import inwards Java :

1) Static import statements are written every bit "import static" inwards code in addition to non "static import".

2) If y'all import 2 static fields alongside same lift explicitly e.g. Integer.MAX_VALUE in addition to Long.MAX_VALUE in addition to then Java volition throw compile fourth dimension error. But if other static modifier is non imported explicitly e.g. y'all accept imported java.lang.Long.*, MAX_VALUE volition refer to Integer.MAX_VALUE.

3) Static import doesn't ameliorate readability every bit expected, every bit many Java programmer prefer Integer.MAX_VALUE which is clear that which MAX_VALUE are y'all referring.

4) You tin apply static import statement non alone on static fields but too on static methods inwards Java.

That's all on What is static import inwards Java 5, What is advantages in addition to drawbacks of using static import inwards Java plan in addition to how to piece of work static import inwards Java. Honestly, its been almost a decade alongside Java v released but I accept rarely used static import statements. May hold upwards inwards hereafter I may figure out a potent convincing argue to piece of work static import

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