Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.geeksforgeeks.org/java/sortedmap-submap-method-in-java/ below:

SortedMap subMap() method in Java

Last Updated : 26 Nov, 2018

The subMap() method of

is used to return a view of the portion of this map whose keys range from

, inclusive, to

, exclusive.

• The map returned by this method is backed by this map, so changes in the returned map are reflected in this map, and vice-versa.
• The map returned by this method supports all optional map operations that this map supports.

: The map returned by this method will throw an IllegalArgumentException if an attempt is made to insert a key outside its range.

:

SortedMap<K, V> subMap(K fromKey,
                      K toKey)

Where, K is the type of key maintained by this Set and V is the type of values associated with the Key.

: This function accepts two parameter

and

which represents low endpoint (inclusive) and high endpoint (exclusive) respectively of the keys in the returned map.

: It returns a view of the portion of this map whose keys range from

to

.

:

• ClassCastException: If the parameter fromKey is not compatible with this map's comparator (or, if the map has no comparator, if fromKey does not implement Comparable).
• NullPointerException: If the parameter fromKey is null and this map does not permit null keys.
• IllegalArgumentException: If this map itself has a restricted range, and fromKey lies outside the bounds of the range

Below programs illustrate the above method:

:

// A Java program to demonstrate
// working of SortedSet
import java.util.*;

public class Main {
    public static void main(String[] args)
    {
        // Create a TreeSet and inserting elements
        SortedMap<Integer, String> mp = new TreeMap<>();

        // Adding Element to SortedSet
        mp.put(1, "One");
        mp.put(2, "Two");
        mp.put(3, "Three");
        mp.put(4, "Four");
        mp.put(5, "Five");

        // Returning the key ranging
        // between 2 and 5
        System.out.print("Elements in range from 2 to 5 in the map is : "
                         + mp.subMap(2, 5));
    }
}

Elements in range from 2 to 5 in the map is : {2=Two, 3=Three, 4=Four}

:

// A Java program to demonstrate
// working of SortedSet
import java.util.*;

public class Main {
    public static void main(String[] args)
    {
        // Create a TreeSet and inserting elements
        SortedMap<String, String> mp = new TreeMap<>();

        // Adding Element to SortedSet
        mp.put("One", "Geeks");
        mp.put("Two", "For");
        mp.put("Three", "Geeks");
        mp.put("Four", "Code");
        mp.put("Five", "It");

        // Returning the key range between D and Z
        System.out.print("Key in range from D to Z in the map is : "
                         + mp.subMap("D", "Z"));
    }
}

Key in range from D to Z in the map is : {Five=It, Four=Code, One=Geeks, Three=Geeks, Two=For}

:

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4