java.util.Collections.unmodifiableSortedMap() Method

---

Description

The unmodifiableSortedMap() method is used to return an unmodifiable view of the specified sorted map.

Declaration

Following is the declaration for java.util.Collections.unmodifiableSortedMap() method.

public static <K,V> SortedMap <K,V> unmodifiableSortedMap(SortedMap <K,? extends V> m)

Parameters

m − This is the map for which an unmodifiable view is to be returned.

Return Value

The method call returns an unmodifiable view of the specified sorted map.

Exception

NA

Example

The following example shows the usage of java.util.Collections.unmodifiableSortedMap()

package com.tutorialspoint;

import java.util.*;

public class CollectionsDemo {
   public static void main(String[] s) {
   
      // create sorted map
      SortedMap<String,String> map = new TreeMap<String, String>();

      // populate the set
      map.put("1","New");
      map.put("2","to");
      map.put("3","TP");

      System.out.println("Initial sorted map value: "+map);

      // create unmodifiable sorted map
      Map unmodsortmap = Collections.unmodifiableSortedMap(map);

      // try to modify the sorted map
      unmodsortmap.put("4","Modify");
   }
}

Let us compile and run the above program, this will produce the following result.

Initial sorted map value: {1=New, 2=to, 3=TP}
Exception in thread "main" java.lang.UnsupportedOperationException