8:16 am - Tuesday November 21, 2017

The unmodifiableSet() method Returns an unmodifiable view of the specified set in Descending order using unmodifiableSet(Set s)

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       The unmodifiableSet() method Returns an unmodifiable view of the specified set in Descending order

Example Program


import java.util.*;

public class UnmodifiableSetclt {
	public static void main(String[] args) {
		// create hashset object
		Set set = new HashSet();
		// set the value in hashset
		set.add("xiva");
		set.add("yelcom");
		set.add("zava");
		// display the initial value in set
		System.out.println("Initial set value: " + set);
		// make the set unmodifiable
		Set unmodset = Collections.unmodifiableSet(set);
		// try to modify the set
		unmodset.add("hello");
	}

}


Output:

 Initial set value: [zava, yelcom, xiva]Exception in thread “main” java.lang.UnsupportedOperationException

at java.util.Collections$UnmodifiableCollection.add(Unknown Source)

at SecondTask.UnmodifiableSetclt.main(UnmodifiableSetclt.java:18)

Explanation:

The unmodifiableSet() method Returns an unmodifiable view of the specified set in Descending order

Parameter: s–

This is the set for which an unmodifiable view is to be returned.

Return:

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

Throw: NA

Filed in: Z-A All Java Codes

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