Java : Collection Framework : LinkedList (Convert to Array Object)

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LinkedListToArrayExample.java

import java.util.LinkedList;

/*
 * Example of toArray(T[] a) methods
 */
public class LinkedListToArrayExample
{

    public static void main(String[] args)
    {
        LinkedList<Integer> linkedList = new LinkedList<Integer>();
        linkedList.add(200);
        linkedList.add(300);
        linkedList.add(10000);
        linkedList.add(5000);
        linkedList.add(2000);

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

        Integer[] integerArray = new Integer[linkedList.size()];

        /*
         * linkedList elements will be copied to IntegerArray
         */

        linkedList.toArray(integerArray);

        /*
         * Get value from the integerArray using for loop
         */
        System.out.println("Array elemtents are ---");
        for (Integer value : integerArray)
        {
            System.out.println(value);
        }

    }

}

Output

linkedList : [200, 300, 10000, 5000, 2000]

Array elemtents are ---
200
300
10000
5000
2000

LinkedListToObjArrayExample.java

import java.util.LinkedList;

/*
 * Example of toArray() method
 */
public class LinkedListToObjArrayExample
{

    public static void main( String[] args )
    {
        LinkedList<Integer> linkedList = new LinkedList<Integer>();
        linkedList.add(200);
        linkedList.add(300);
        linkedList.add(10000);
        linkedList.add(5000);
        linkedList.add(2000);

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


        /*
         * Returns an array containing all of the elements in this list in
         * proper sequence (from first to last element).
         */

        Object[] objArray = linkedList.toArray();
        System.out.println("Array elemtents are ---");
        for( Object object : objArray )
        {
            Integer value = (Integer) object;
            System.out.println(value);
        }

    }
}

Output

linkedList : [200, 300, 10000, 5000, 2000]

Array elemtents are ---
200
300
10000
5000
2000

To Download LinkedListDemoToArray Project Click the below link

https://sites.google.com/site/javaee4321/java-collections/LinkedListDemoToArray.zip?attredirects=0&d=1

See also:

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