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LinkedHashSet equals() method in Java with Example

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The equals() method of java.util.LinkedHashSet class is used to compare the specified object with this set for equality. Returns true if and only if the specified object is also a set, both sets have the same size, and all corresponding pairs of elements in the two sets are equal. (Two elements e1 and e2 are equal if (e1==null ? e2==null : e1.equals(e2)).) In other words, two sets are defined to be equal if they contain the same elements in any order. 

Syntax:

public boolean equals(Object o)

Parameters: This method takes the object o as a parameter to be compared for equality with this set. 

Returns Value: This method returns true if the specified object is equal to this set. Below are examples to illustrate the equals() method.

Example 1: 

Java




// Java program to demonstrate equals()
// method of LinkedHashSet
 
import java.util.*;
 
public class GFG {
    public static void main(String[] argv)
    {
 
        // Creating object of LinkedHashSet<String>
        LinkedHashSet<String> set1
            = new LinkedHashSet<String>();
 
        // Populating set1
        set1.add("A");
        set1.add("B");
        set1.add("C");
        set1.add("D");
        set1.add("E");
 
        // print set1
        System.out.println("First LinkedHashSet: " + set1);
 
        // Creating another object of LinkedHashSet<String>
        LinkedHashSet<String> set2
            = new LinkedHashSet<String>();
 
        // Populating set2
        set2.add("A");
        set2.add("B");
        set2.add("C");
        set2.add("D");
        set2.add("E");
 
        // print set2
        System.out.println("Second LinkedHashSet: " + set2);
 
        // comparing first LinkedHashSet to another
        // using equals() method
        boolean value = set1.equals(set2);
 
        // print the value
        System.out.println("Are both set equal: " + value);
    }
}


Output:

First LinkedHashSet: [A, B, C, D, E]
Second LinkedHashSet: [A, B, C, D, E]
Are both set equal: true

Example 2: 

Java




// Java program to demonstrate equals()
// method of LinkedHashSet
 
import java.util.*;
 
public class GFG1 {
    public static void main(String[] argv)
    {
 
        // Creating object of LinkedHashSet
        LinkedHashSet<Integer>
            set1 = new LinkedHashSet<Integer>();
 
        // Populating set1
        set1.add(10);
        set1.add(20);
        set1.add(30);
        set1.add(40);
        set1.add(50);
 
        // print set1
        System.out.println("First LinkedHashSet: "
                           + set1);
 
        // Creating another object of LinkedHashSet
        LinkedHashSet<Integer>
            set2 = new LinkedHashSet<Integer>();
 
        // Populating set2
        set2.add(10);
        set2.add(20);
        set2.add(30);
 
        // print set2
        System.out.println("Second LinkedHashSet: "
                           + set2);
 
        // comparing first LinkedHashSet to another
        // using equals() method
        boolean value = set1.equals(set2);
 
        // print the value
        System.out.println("Are both set equal: "
                           + value);
    }
}


Output:

First LinkedHashSet: [10, 20, 30, 40, 50]
Second LinkedHashSet: [10, 20, 30]
Are both set equal: false


Last Updated : 14 Dec, 2022
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