a shot of dev knowledge

RELATED TAGS

What is the SortedMap.subMap() method in Java?

In this shot, we will discuss how to use the SortedMap.subMap() method in Java. This method is present in the SortedMap interface inside the java.util package.

The SortedMap.subMap() method is used to obtain the part of the map for a given range of keys of SortedMap.

Parameters

The SortedMap.subMap() method takes two parameters:

  • Key1: Minimum limit of key (included in result) to return the part of map.
  • Key2: Maximum limit of key (excluded in result) to return the part of map.

Return value

The SortedMap.subMap() method returns:

  • Map: Part of map for the range of keys in the SortedMap.

Code

Let’s look at the below code snippet.

import java.util.*;
class Main 
{
public static void main(String[] args)
{
SortedMap<Integer, String> s = new TreeMap<Integer,String>();

s.put(2,"Welcome");
s.put(12,"to");
s.put(31,"the");
s.put(18,"world");
s.put(25,"of");
s.put(36,"java");

System.out.println("SortedMap mappings are: "+ s);

System.out.println("Map from the min_limit_key=18 to max_limit_key=36: " + s.subMap(18,36));


}
}
Using SortedMap.subMap() method in Java

Explanation

  • In line 1, we imported the required package.
  • In line 2, we made a Main class.
  • In line 4, we made a main function.
  • In line 6, we declared a SortedMap consisting of Integer type keys and String type values.
  • From lines 8 to 13, we inserted values in the Hashtable by using the TreeMap.put() method.
  • In line 15, we displayed the mappings of the present in the SortedMap.
  • In line 17, we used the SortedMap.subMap() method to obtain the subMap for a range of keys and displayed it.

In this way, we can use SortedMap.subMap() method in Java.

RELATED TAGS

RELATED COURSES

View all Courses

Keep Exploring