Java – Get sub List from LinkedList example

Example

In this example, we are getting a sublist of LinkedList using subList(int startIndex, int endIndex) method of LinkedList class. It returns a List between the specified index startIndex(inclusive) and endIndex(exclusive). Any changes made to the sublist will be reflected in the original list (We have tested this in the below program by removing an element from sublist and displaying original list after remove).

import java.util.LinkedList;
import java.util.Iterator;
import java.util.List;
public class SublistExample {
 
 public static void main(String[] args) {
 
    // Create a LinkedList
    LinkedList<String> linkedlist = new LinkedList<String>();
 
    // Add elements to LinkedList
    linkedlist.add("Item1");
    linkedlist.add("Item2");
    linkedlist.add("Item3");
    linkedlist.add("Item4");
    linkedlist.add("Item5");
    linkedlist.add("Item6");
    linkedlist.add("Item7");
 
    // Displaying LinkedList elements
    System.out.println("LinkedList elements:");
    Iterator it= linkedlist.iterator();
    while(it.hasNext()){
       System.out.println(it.next());
    }
 
    // Obtaining Sublist from the LinkedList
    List sublist = linkedlist.subList(2,5);
 
    // Displaying SubList elements
    System.out.println("\nSub List elements:");
    Iterator subit= sublist.iterator();
    while(subit.hasNext()){
       System.out.println(subit.next());
    }
 
    /* Any changes made to Sub List will be reflected
     * in the original List. Lets take this example - We
     * are removing element "Item4" from sublist and it 
     * should be removed from original list too. Observe 
     * the Output of this part of the program.
     */
    sublist.remove("Item4");
    System.out.println("\nLinkedList elements After remove:");
    Iterator it2= linkedlist.iterator();
    while(it2.hasNext()){
       System.out.println(it2.next());
    }
 }
}

Output:

LinkedList elements:
Item1
Item2
Item3
Item4
Item5
Item6
Item7

Sub List elements:
Item3
Item4
Item5

LinkedList elements After remove:
Item1
Item2
Item3
Item5
Item6
Item7