java.util.Collections.unmodifiableSortedSet() Method

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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