Following methods are used to get first element in linked list in java:
- element(): Retrieves, but does not remove, the head (first element) of this list.
- getFirst(): Returns the first element in this list.
- peek(): Retrieves, but does not remove, the head (first element) of this list.
- peekFirst(): Retrieves, but does not remove, the first element of this list, or returns null if this list is empty.
Example:
package com.w3spoint; import java.util.LinkedList; public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); linkedList.add("Hemant"); System.out.println("Actual LinkedList:"+linkedList); System.out.println("First Element: "+linkedList.element()); System.out.println("First Element: "+linkedList.getFirst()); System.out.println("First Element: "+linkedList.peek()); System.out.println("First Element: "+linkedList.peekFirst()); } } |
Output
Actual LinkedList:[Jai, Mahesh, Naren, Vivek, Vishal, Hemant] First Element: Jai First Element: Jai First Element: Jai First Element: Jai |
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