JAVA EE: Java Tutorial : Java Static Import (Collections)

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Java Tutorial : Java Static Import (Collections)

WithOutStaticImportExample.java

import java.util.Collections;

/**
 * 
 * Example of with out Static import.
 *
 */
public class WithOutStaticImportExample
{

    public static void main(String[] args)
    {

        System.out.println("Empty List : " + Collections.EMPTY_LIST);
        System.out.println("Empty Set : " + Collections.emptySet());

    }

}

StaticImportExample1.java

import static java.util.Collections.*;

/**
 * 
 * Example of Static import.
 *
 */
public class StaticImportExample1
{

    public static void main(String[] args)
    {

        // System.out.println("Empty List : " + Collections.EMPTY_LIST); // With out static import
        System.out.println("Empty List : " + EMPTY_LIST); // With static import

        // System.out.println("Empty Set : " + Collections.emptySet()); // With out static import
        System.out.println("Empty Set : " + emptySet()); // With static import

    }

}

StaticImportExample2.java

import static java.util.Collections.EMPTY_LIST;
import static java.util.Collections.emptySet;

/**
 * 
 * Example of Static import.
 *
 */
public class StaticImportExample2
{

    public static void main(String[] args)
    {

        // System.out.println("Empty List : " + Collections.EMPTY_LIST); // With out static import
        System.out.println("Empty List : " + EMPTY_LIST); // With static import

        // System.out.println("Empty Set : " + Collections.emptySet()); // With out static import
        System.out.println("Empty Set : " + emptySet()); // With static import

    }

}