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What is the SortedMap.subMap() method in Java?
What is the SortedMap.subMap() method in Java? Answer
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));
}
}
Explanation
- In line 1, we imported the required package.
- In line 2, we made a
Mainclass. - In line 4, we made a
mainfunction. - In line 6, we declared a
SortedMapconsisting 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 thesubMapfor a range of keys and displayed it.
In this way, we can use SortedMap.subMap() method in Java.
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