JAVA EE: Java : Collection Framework : Collections (Disjoint)

Wednesday 8 July 2015

Java : Collection Framework : Collections (Disjoint)

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CollectionsExample.java

import java.util.ArrayList;
import java.util.Collections;

/*
 Example of:  

 disjoint(Collection<?> c1, Collection<?> c2)

 Parameters:

 c1 - a collection
 c2 - a collection

 Returns:

 true if the two specified collections have no elements in common.

 */

public class CollectionsExample
{

    public static void main(String[] args)
    {

        ArrayList<Integer> arrayList1 = new ArrayList<Integer>();

        arrayList1.add(2000);
        arrayList1.add(3000);
        arrayList1.add(4000);

        System.out.println("arrayList1 : " + arrayList1 + "\n");

        ArrayList<Integer> arrayList2 = new ArrayList<Integer>();

        arrayList2.add(100);
        arrayList2.add(200);
        arrayList2.add(300);

        System.out.println("arrayList2 : " + arrayList2 + "\n");

        /*
         * Returns true if the two specified collections have no elements in
         * common.
         */

        boolean isNoCommonElement = Collections
                .disjoint(arrayList1, arrayList2);
        
        System.out.println("isNoCommonElement : "+isNoCommonElement);

        if (isNoCommonElement)
        {
            System.out
                    .println("No CommonElement exists in arrayList1 and arrayList2 ");
        }
        else
        {
            System.out
                    .println("CommonElement exists in arrayList1 and arrayList2 ");
        }

        System.out.println("\n"
                + "*****************************************************"
                + "\n");

        ArrayList<Integer> arrayList3 = new ArrayList<Integer>();

        arrayList3.add(10);
        arrayList3.add(20);
        arrayList3.add(30);

        System.out.println("arrayList3 : " + arrayList3 + "\n");

        ArrayList<Integer> arrayList4 = new ArrayList<Integer>();

        arrayList4.add(1000);
        arrayList4.add(1001);
        arrayList4.add(10);

        System.out.println("arrayList4 : " + arrayList4 + "\n");

        isNoCommonElement = Collections.disjoint(arrayList3, arrayList4);
        
        System.out.println("isNoCommonElement : "+isNoCommonElement);

        if (isNoCommonElement)
        {
            System.out
                    .println("No CommonElement exists in arrayList3 and arrayList4 ");
        }
        else
        {
            System.out
                    .println("CommonElement exists in arrayList3 and arrayList4 ");
        }

    }

}

Output

arrayList1 : [2000, 3000, 4000]

arrayList2 : [100, 200, 300]

isNoCommonElement : true
No CommonElement exists in arrayList1 and arrayList2 

*****************************************************

arrayList3 : [10, 20, 30]

arrayList4 : [1000, 1001, 10]

isNoCommonElement : false
CommonElement exists in arrayList3 and arrayList4