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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