The AbstractMap.equals() method in Java is used to check for equality between two maps. It verifies whether the elements of one map passed as a parameter is equal to the elements of this map or not.
Syntax:
AbstractMap1.equals(AbstractMap2)
Parameters: The method accepts one parameter ihashmap2 of abstract hash map type and refers to the map whose equality is to be checked with this abstract map.
Return Value: The method returns true if the equality holds for both the object map else it returns false.
Below programs illustrate the working of AbstractMap.equals() method:
Program 1:
// Java code to illustrate the equals() method import java.util.*;
public class Abstract_Map_Demo {
public static void main(String[] args)
{
// Creating an empty AbstractMap
AbstractMap<Integer, String>
abstract_hash1 = new IdentityHashMap<Integer, String>();
AbstractMap<Integer, String>
abstract_hash2 = new IdentityHashMap<Integer, String>();
// Mapping string values to int keys
abstract_hash1.put( 10 , "Geeks" );
abstract_hash1.put( 15 , "4" );
abstract_hash1.put( 20 , "Geeks" );
abstract_hash1.put( 25 , "Welcomes" );
abstract_hash1.put( 30 , "You" );
// Mapping string values to int keys
abstract_hash2.put( 10 , "Geeks" );
abstract_hash2.put( 15 , "4" );
abstract_hash2.put( 20 , "Geeks" );
abstract_hash2.put( 25 , "Welcomes" );
abstract_hash2.put( 30 , "You" );
// Displaying the AsbstractMap
System.out.println( "First Map: "
+ abstract_hash1);
// Displaying the final AbstractMap
System.out.println( "Second Map: "
+ abstract_hash2);
// Displaying the equality
System.out.println( "Equality: "
+ abstract_hash1.equals(abstract_hash2));
}
} |
Output:
First Map: {10=Geeks, 30=You, 20=Geeks, 25=Welcomes, 15=4} Second Map: {10=Geeks, 30=You, 20=Geeks, 25=Welcomes, 15=4} Equality: true
Program 2:
// Java code to illustrate the equals() method import java.util.*;
public class Abstract_Map_Demo {
public static void main(String[] args)
{
// Creating an empty AbstractMap
AbstractMap<Integer, String>
abstract_hash1 = new IdentityHashMap<Integer, String>();
AbstractMap<Integer, String>
abstract_hash2 = new IdentityHashMap<Integer, String>();
// Mapping string values to int keys
abstract_hash1.put( 10 , "Geeks" );
abstract_hash1.put( 15 , "4" );
abstract_hash1.put( 20 , "Geeks" );
abstract_hash1.put( 25 , "Welcomes" );
abstract_hash1.put( 30 , "You" );
// Mapping string values to int keys
abstract_hash2.put( 10 , "Geeks" );
abstract_hash2.put( 15 , "4" );
abstract_hash2.put( 20 , "Geek" );
abstract_hash2.put( 25 , "Welcomes" );
abstract_hash2.put( 30 , "You" );
// Displaying the IdentityHashMap
System.out.println( "First Map: "
+ abstract_hash1);
// Displaying the final IdentityHashMap
System.out.println( "Second Map: "
+ abstract_hash2);
// Displaying the equality
System.out.println( "Equality: "
+ abstract_hash1.equals(abstract_hash2));
}
} |
Output:
First Map: {10=Geeks, 30=You, 20=Geeks, 25=Welcomes, 15=4} Second Map: {10=Geeks, 30=You, 20=Geek, 25=Welcomes, 15=4} Equality: false