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Program: How to remove elements from LinkedList?


Description:

Below example shows how to remove or delete an element from LinkedList. LinkedList provides few methods to remove elements, those methods are:

remove(): Retrieves and removes the head (first element) of this list.
remove(index): Removes the element at the specified position in this list.
remove(object): Removes the first occurrence of the specified element from this list, if it is present.
removeFirst(): Removes and returns the first element from this list.
removeFirstOccurrence(object): Removes the first occurrence of the specified element in this list (when traversing the list from head to tail).
removeLast(): Removes and returns the last element from this list.
removeLastOccurrence(object): Removes the last occurrence of the specified element in this list (when traversing the list from head to tail).


Code:
package com.java2novice.linkedlist;

import java.util.LinkedList;

public class MyAllRemoveOprs {

	public static void main(String a[]){
		
		LinkedList<String> arrl = new LinkedList<String>();
		arrl.add("First");
		arrl.add("Second");
		arrl.add("Third");
		arrl.add("Random");
		arrl.add("four");
		arrl.add("five");
		arrl.add("six");
		arrl.add("seven");
		arrl.add("eight");
		arrl.add("nine");
		System.out.println(arrl);
		System.out.println("Remov() method:"+arrl.remove());
		System.out.println("After remove() method call:");
		System.out.println(arrl);
		System.out.println("remove(index) method:"+arrl.remove(2));
		System.out.println("After remove(index) method call:");
		System.out.println(arrl);
		System.out.println("Remov(object) method:"+arrl.remove("six"));
		System.out.println("After remove(object) method call:");
		System.out.println(arrl);
		System.out.println("removeFirst() method:"+arrl.removeFirst());
		System.out.println("After removeFirst() method call:");
		System.out.println(arrl);
		System.out.println("removeFirstOccurrence() method:"
							+arrl.removeFirstOccurrence("eight"));
		System.out.println("After removeFirstOccurrence() method call:");
		System.out.println(arrl);
		System.out.println("removeLast() method:"+arrl.removeLast());
		System.out.println("After removeLast() method call:");
		System.out.println(arrl);
		System.out.println("removeLastOccurrence() method:"
							+arrl.removeLastOccurrence("five"));
		System.out.println("After removeLastOccurrence() method call:");
		System.out.println(arrl);
	}
}

Output:
[First, Second, Third, Random, four, five, six, seven, eight, nine]
Remov() method:First
After remove() method call:
[Second, Third, Random, four, five, six, seven, eight, nine]
remove(index) method:Random
After remove(index) method call:
[Second, Third, four, five, six, seven, eight, nine]
Remov(object) method:true
After remove(object) method call:
[Second, Third, four, five, seven, eight, nine]
removeFirst() method:Second
After removeFirst() method call:
[Third, four, five, seven, eight, nine]
removeFirstOccurrence() method:true
After removeFirstOccurrence() method call:
[Third, four, five, seven, nine]
removeLast() method:nine
After removeLast() method call:
[Third, four, five, seven]
removeLastOccurrence() method:true
After removeLastOccurrence() method call:
[Third, four, seven]
<< Previous Program 

List Of All LinkedList Sample Programs:

  1. Basic LinkedList Operations.
  2. How to read all elements in LinkedList by using iterator?
  3. How to copy or clone a LinkedList?
  4. How to add all elements of a list to LinkedList?
  5. How to delete all elements from my LinkedList?
  6. How to find does LinkedList contains all list elements or not?
  7. How to copy LinkedList to array?
  8. How to get sub list from LinkedList?
  9. How to sort LinkedList using Comparator?
  10. How to reverse LinkedList content?
  11. How to shuffle elements in LinkedList?
  12. How to swap two elements in a LinkedList?
  13. How to convert list to csv string format?
  14. How to add element at first position in LinkedList?
  15. How to add element at last position in LinkedList?
  16. How to read first element from LinkedList?
  17. How to read last element from LinkedList?
  18. How to iterate through LinkedList in reverse order?
  19. LinkedList push(), pop() operations examples.
  20. How to remove elements from LinkedList?
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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