AbstractMap get() Method in Java with Examples
The AbstractMap.get() method of AbstractMap class is used to retrieve or fetch the value mapped by a particular key mentioned in the parameter. It returns NULL when the map contains no such mapping for the key.
Syntax:
AbstractMap.get(Object key_element)
Parameter: The method takes one parameter key_element of object type and refers to the key whose associated value is supposed to be fetched.
Return Value: The method returns the value associated with the key_element in the parameter.
Below programs illustrates the working of AbstractMap.get() method:
Program 1: Mapping String Values to Integer Keys.
import java.util.*;
public class Abstract_Map_Demo {
public static void main(String[] args)
{
AbstractMap<Integer, String>
abs_map = new HashMap<Integer, String>();
abs_map.put( 10 , "Geeks" );
abs_map.put( 15 , "4" );
abs_map.put( 20 , "Geeks" );
abs_map.put( 25 , "Welcomes" );
abs_map.put( 30 , "You" );
System.out.println( "Initial Mappings are: "
+ abs_map);
System.out.println( "The Value is: "
+ abs_map.get( 25 ));
System.out.println( "The Value is: "
+ abs_map.get( 10 ));
}
}
|
Output:
Initial Mappings are: {20=Geeks, 25=Welcomes, 10=Geeks, 30=You, 15=4}
The Value is: Welcomes
The Value is: Geeks
Program 2: Mapping Integer Values to String Keys.
import java.util.*;
public class Abstract_Map_Demo {
public static void main(String[] args)
{
AbstractMap<String, Integer>
abs_map = new HashMap<String, Integer>();
abs_map.put( "Geeks" , 10 );
abs_map.put( "4" , 15 );
abs_map.put( "Geeks" , 20 );
abs_map.put( "Welcomes" , 25 );
abs_map.put( "You" , 30 );
System.out.println( "Initial Mappings are: "
+ abs_map);
System.out.println( "The Value is: "
+ abs_map.get( "Geeks" ));
System.out.println( "The Value is: "
+ abs_map.get( "You" ));
}
}
|
Output:
Initial Mappings are: {4=15, Geeks=20, You=30, Welcomes=25}
The Value is: 20
The Value is: 30
Note: The same operation can be performed with any type of Mappings with variation and combination of different data types.
Last Updated :
26 Oct, 2018
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...