Java Collections emptySortedMap() Method with Examples

Last Updated : 03 Jan, 2022

The emptySortedMap() method of Java Collections is used to get a map that has no elements. A Sorted map is a data structure that can hold elements with key-value pairs in sorted order.

Syntax:

public static final <Key,Value> SortedMap<Key,Value> emptySortedMap()

where,

key is the key element
value is the value element

Parameters: This method does not take any parameters.

Return Type: It will return an empty sorted map that is immutable.

Example 1:

Java program to create an empty sorted map.

Java

import java.util.*;  public class GFG {     // main method     public static void main(String[] args)     {         // create an empty sorted map         SortedMap<String, String> data             = Collections.emptySortedMap();          // display         System.out.println(data);     } }

Output

{}

Example 2:

In this program, we are going to create an empty sorted map and add elements to the map. This method will return an error.

Java

import java.util.*;  public class GFG {     // main method     public static void main(String[] args)     {         // create an empty sorted map         SortedMap<String, String> data             = Collections.emptySortedMap();                // add 3 elements         data.put("1", "ojaswi");         data.put("2", "ramya");         data.put("3", "deepu");          // display         System.out.println(data);     } }

Output:

Exception in thread "main" java.lang.UnsupportedOperationException      at java.util.Collections$UnmodifiableMap.put(Collections.java:1459)      at GFG.main(GFG.java:10)

Example 3:

Java

import java.util.*;  public class GFG {     // main method     public static void main(String[] args)     {         // create an empty sorted map         SortedMap<Integer, Integer> data             = Collections.emptySortedMap();                // add 3 elements         data.put(1, 34);         data.put(2, 45);         data.put(3, 56);          // display         System.out.println(data);     } }

Output:

Exception in thread "main" java.lang.UnsupportedOperationException      at java.util.Collections$UnmodifiableMap.put(Collections.java:1459)      at GFG.main(GFG.java:10)

Java Collections emptySortedMap() Method with Examples

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Java Collections emptySortedMap() Method with Examples

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