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Checking if Element Exists in LinkedHashSet in Java
  • Difficulty Level : Basic
  • Last Updated : 11 Dec, 2020

The Java.util.LinkedHashSet.contains() method is used to check whether a specific element is present in the LinkedHashSet or not. So basically it is used to check if a Set contains any particular element. The contains a method of the LinkedHashSet class returns true if the specified element is found in the LinkedHashSet object.

Example:

Given List: [1, 2, 3, 4]

Input : FirstSearch = 1, SecondSearch = 6
Output: True False

Syntax:

Hash_Set.contains(Object element)

Return Type: If the element found in the then it returns true, else false.

Parameters: The parameter element is of the type of LinkedHashSet. This is the element that needs to be tested if it is present in the set or not.



Example:

Java

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// Checking if element exists in LinkedHashSet in Java
import java.util.LinkedHashSet;
public class LinkedHashSetContainsExample {
  
    public static void main(String[] args)
    {
  
        LinkedHashSet<String> lhSetColors
            = new LinkedHashSet<String>();
  
        lhSetColors.add("red");
        lhSetColors.add("green");
        lhSetColors.add("blue");
  
        /*
         * To check if the LinkedHashSet contains the
         * element, use the contains method.
         */
  
        // this will return true as the "red" element exists
        System.out.println(lhSetColors.contains("red"));
  
        // this will return true as the "white" element does
        // not exists
        System.out.println(lhSetColors.contains("white"));
    }
}

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Output

true
false

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