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copied!<p>Use </p> <pre><code>LinkedList<Integer> ll = new LinkedList<Integer>(); Iterator<Integer> itr = ll.iterator(); ListIterator<Integer> litr = ll.listIterator(); </code></pre> <p>Insted of </p> <pre><code>LinkedList ll = new LinkedList(); Iterator itr = ll.iterator(); ListIterator litr = ll.listIterator(); </code></pre> <p>As shown below</p> <pre><code> LinkedList<Integer> ll = new LinkedList<Integer>(); System.out.println("CONTENTS OF l1 = " + ll); System.out.println("SIZE = " + ll.size()); ll.add(new Integer(10)); ll.add(new Integer(20)); ll.add(new Integer(30)); ll.add(new Integer(40)); System.out.println("CONTENTS OF ll = " + ll); System.out.println("SIZE = " + ll.size()); // retrieving data of ll using toArray () Object obj[] = ll.toArray(); int s = 0; for (int i = 0; i < obj.length; i++) { Integer io = (Integer) obj[i]; int x = io.intValue(); s = s + x; } System.out.println("SUM USING toArray () = " + s); ll.addFirst(new Integer(5)); ll.addFirst(new Integer(6)); System.out.println("CONTENTS OF ll = " + ll); System.out.println("SIZE = " + ll.size()); // retrieving data of ll using iterator () Iterator<Integer> itr = ll.iterator(); int s1 = 0; while (itr.hasNext()) { Object obj1 = itr.next(); Integer io1 = (Integer) obj1; int x1 = io1.intValue(); s1 = s1 + x1; } System.out.println("SUM USING iterator () = " + s1); ListIterator<Integer> litr = ll.listIterator(); while (litr.hasNext()) { Object obj2 = litr.next(); System.out.print(obj2 + ","); } System.out.println("\n"); while (litr.hasNext()) { Object obj3 = litr.next(); System.out.print(obj3 + ","); } System.out.println("\n"); Object obj4 = ll.get(2);// random retrieval System.out.println(obj4); </code></pre>

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