The get() method of SortedMap interface in Java 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:
thisMap.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 this Map collection.
Note: The get() method in SortedMap is inherited from the Map interface in Java.
Below programs illustrates the working of java.util.SortedMap.get() method:
Program 1: Mapping String Values to Integer Keys.
// Java code to illustrate// the get() method  import java.util.*;  public class Map_Demo {    public static void main(String[] args)    {          // Creating an empty SortedMap        SortedMap<Integer, String> map            = new TreeMap<Integer, String>();          // Mapping string values to int keys        map.put(10, "Geeks");        map.put(15, "4");        map.put(20, "Geeks");        map.put(25, "Welcomes");        map.put(30, "You");          // Displaying the SortedMap        System.out.println(            "Initial Mappings are: "            + map);          // Getting the value of 25        System.out.println(            "The Value is: "            + map.get(25));          // Getting the value of 10        System.out.println(            "The Value is: "            + map.get(10));    }} |
Initial Mappings are:
{10=Geeks, 15=4, 20=Geeks, 25=Welcomes, 30=You}
The Value is: Welcomes
The Value is: Geeks
Program 2: Mapping Integer Values to String Keys.
// Java code to illustrate// the get() method  import java.util.*;  public class Map_Demo {    public static void main(String[] args)    {          // Creating an empty SortedMap        SortedMap<String, Integer> map            = new TreeMap<String, Integer>();          // Mapping int values to string keys        map.put("Geeks", 10);        map.put("4", 15);        map.put("Geeks", 20);        map.put("Welcomes", 25);        map.put("You", 30);          // Displaying the SortedMap        System.out.println(            "Initial Mappings are: "            + map);          // Getting the value of "Geeks"        System.out.println(            "The Value is: "            + map.get("Geeks"));          // Getting the value of "You"        System.out.println(            "The Value is: "            + map.get("You"));    }} |
Initial Mappings are: {4=15, Geeks=20, Welcomes=25, You=30}
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.
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Map.html#get(java.lang.Object)
