boolean isEmpty()

// Java code to show the implementation of
// isEmpty method in SortedMap interface
 
import java.util.*;
 
public class GfG {
 
    // Driver code
    public static void main(String[] args)
    {
 
        // Initializing a SortedMap
        SortedMap<String, String> map
            = new TreeMap<>();
 
        System.out.println(map);
 
        System.out.println(map.isEmpty());
    }
}

{}
true

// Java code to show the implementation of
// isEmpty method in SortedMap interface
 
import java.util.*;
 
public class GfG {
 
    // Driver code
    public static void main(String[] args)
    {
 
        // Initializing a SortedMap
        SortedMap<String, String> map
            = new TreeMap<>();
 
        map.put("1", "One");
        map.put("3", "Three");
        map.put("5", "Five");
        map.put("7", "Seven");
        map.put("9", "Ninde");
        System.out.println(map);
 
        System.out.println(map.isEmpty());
    }
}

{1=One, 3=Three, 5=Five, 7=Seven, 9=Ninde}
false