java.util.Collections.unmodifiableSortedSet() Method

Description

The unmodifiableSortedSet() method is used get an unmodifiable view of the specified sorted set.

Declaration

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

public static <T> SortedSet <T> unmodifiableSortedSet(SortedSet <T> s)

Parameters

• s--This is the sorted set for which an unmodifiable view is to be returned.

Return Value

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

Exception

• NA

Example

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

package com.tutorialspoint;

import java.util.*;

public class CollectionsDemo {
   public static void main(String[] s) {
      // create sorted set
      SortedSet<String> set = new TreeSet<String>();
      
      // populate the set
      set.add("Welcome");
      set.add("to");
      set.add("TP");
      
      System.out.println("Initial set value: "+set);
      
      // create unmodifiable sorted set
      Set unmodsortset = Collections.unmodifiableSortedSet(set);

      // try to modify the sorted set
      unmodsortset.add("Hello");
   }
}

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

Initial set value: [TP, Welcome, to]
Exception in thread "main" java.lang.UnsupportedOperationException