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/* Remove first and last elements of LinkedList Java example This java example shows how to remove first and last elements of Java LinkedList object using removeFirst and removeLast methods. */ import java.util.LinkedList; public class RemoveFirstLastElementsLinkedListExample { public static void main(String[] args) { //create LinkedList object LinkedList lList = new LinkedList(); //add elements to LinkedList lList.add("1"); lList.add("2"); lList.add("3"); lList.add("4"); lList.add("5"); System.out.println("LinkedList contains : " + lList); /* * To remove first element of Java LinkedList, use * Object removeFirst() method. * * This method removes first element of LinkedList and shifts the subsequent * elements to the left. It returns the element previously at the first index * of the LinkedList. */ Object object = lList.removeFirst(); System.out.println(object + " has been removed from the first index of LinkedList"); System.out.println("LinkedList now contains : " + lList); /* * To remove last element of Java LinkedList, use * Object removeLast() method. * * This method removes last element of LinkedList. It returns the element * previously at the last index of the LinkedList. */ object = lList.removeLast(); System.out.println(object + " has been removed from the last index of LinkedList"); System.out.println("LinkedList now contains : " + lList); } } /* Output would be LinkedList contains : [1, 2, 3, 4, 5] 1 has been removed from the first index of LinkedList LinkedList now contains : [2, 3, 4, 5] 5 has been removed from the last index of LinkedList LinkedList now contains : [2, 3, 4] */ |
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