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Java LinkedHashSet contains() Method with Example

LinkedHashSet Class contains() method: Here, we are going to learn about the contains() method of LinkedHashSet Class with its syntax and example.
Submitted by Preeti Jain, on March 24, 2020

LinkedHashSet Class contains() method

  • contains() method is available in java.util package.
  • contains() method is used to check whether the given object (ob) exists or not exists in this LinkedHashSet.
  • contains() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • contains() method does not throw an exception at the time of checking elements.

Syntax:

    public boolean contains(Object ob);

Parameter(s):

  • Object ob – represents the object to be tested for its existence in this LinkedHashSet.

Return value:

The return type of the method is boolean, it returns true when the given object exists otherwise it returns false.

Example:

// Java program to demonstrate the example // of boolean contains(Object ob) method of // LinkedHashSet import java.util.*; public class ContainsOfLinkedHashSet { public static void main(String[] args) { // Instantiates a LinkedHashSet object HashSet < String > hs = new LinkedHashSet < String > (); // By using add() method is to add // the given object of this // LinkedHashSet hs.add("C"); hs.add("C++"); hs.add("JAVA"); hs.add("PHP"); hs.add("SFDC"); // Display LinkedHashSet System.out.println("LinkedHashSet: " + hs); // By using contains() method is to // check whether the given object exists // or not exists in this LinkedHashSet boolean status = hs.contains("JAVA"); // Display Status System.out.println("hs.contains(JAVA): " + status); } }

Output

LinkedHashSet: [C, C++, JAVA, PHP, SFDC]
hs.contains(JAVA): true


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