Java Collection equals() Method with Examples

by Online Tutorials Library July 22, 2022

Java Collection equals() Method

The equals() method of Java Collection Interface compares the specified object with this collection for equality.

Syntax

Parameters

The parameter ‘o’ represents the object to be compared for equality with this collection.

Overrides

This method overrides equals in class Object

Return

The equals method returns Boolean value ‘true’ if the specified object is equal to this collection else it returns false.

Example 1

  import java.util.Collection;  import java.util.HashSet;  public class JavaCollectionEqualsExample1 {     static  int a=5;      public static void main(String[] args) {          Collection<Integer> collection = new HashSet<>();          Collection<Integer> collection1 = new HashSet<>();          collection.add(5);          collection1.add(5);          //will return true if both the collections are equal          boolean val=collection.equals(collection1);          System.out.println(val);      }  }  

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Output:

true

Example 2

  import java.util.Collection;  import java.util.HashSet;  public class JavaCollectionEqualsExample2 {      public static void main(String[] args) {          Collection<Integer> collection = new HashSet<>();          Collection<Integer> collection1 = new HashSet<>();          collection.add(5);          collection1.add(5);          collection1.add(8);          //will return true if both the collections are equal          boolean val=collection.equals(collection1);          System.out.println(“Equals methods will return : “+val);      }  }  

Test it Now

Output:

Equals methods will return : false

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