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)
