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Check if a particular element exists in LinkedList Java example

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  1. /*
  2.   Check if a particular element exists in LinkedList Java example
  3.   This java example shows how to check if a particular element exists in Java
  4.   LinkedList object using contains method.
  5. */
  6.  
  7. import java.util.LinkedList;
  8.  
  9. public class CheckElementLinkedListExample {
  10.  
  11.   public static void main(String[] args) {
  12.  
  13.     //create LinkedList object
  14.     LinkedList lList = new LinkedList();
  15.    
  16.     //add elements to LinkedList
  17.     lList.add("1");
  18.     lList.add("2");
  19.     lList.add("3");
  20.     lList.add("4");
  21.     lList.add("5");
  22.    
  23.     /*
  24.      * To check if a particular element exists in a LinkedList, use
  25.      * boolean contains(Object obj) method.
  26.      *
  27.      * This method returns true if LinkedList contains a particular element,
  28.      * false otherwise.
  29.      */
  30.    
  31.      boolean blnElement = lList.contains("4");
  32.    
  33.      if(blnElement)
  34.      {
  35.        System.out.println("LinkedList contains 4");
  36.      }
  37.      else
  38.      {
  39.        System.out.println("LinkedList does not contain 4");
  40.      }
  41.   }
  42. }
  43.  
  44. /*
  45. Output would be
  46. LinkedList contains 4
  47. */