What is the SortedMap.tailMap() method in Java?
Overview
In this shot, we will discuss how to use the SortedMap.tailMap() method in Java. This method is present in the SortedMap interface inside the java.util package.
The SortedMap.tailMap() method obtains the part of the map whose keys are greater than or equal to a given SortedMap key.
Syntax
SortedMap.tailMap(key)
Parameter
The SortedMap.tailMap() method takes one parameter:
Key: This method accepts akeyofSortedMap.
Return value
The SortedMap.tailMap() method returns:
Map: The part of the map whose keys are greater than or equal to the given key ofSortedMap.
Code
Let’s look at the code snippet below:
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 key=25: " + s.tailMap(25));}}
Explanation
- In line 1, we import the required package.
- In line 2, we make a
Mainclass. - In line 4, we make a
mainfunction. - In line 6, we declare a
SortedMapconsisting ofIntegertype keys andStringtype values. - From lines 8-13, we insert values in the
SortedMap. - In line 15, we display the values of the
SortedMap. - In line 17, we will call the
SortedMap.tailMap()method to obtain and display the returned map. The returned map will contain(key,value)pairs of keys equal to or greater than thekeypassed to theSortedMap.
In this way, we can use the SortedMap.tailMap() method in Java.
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