Declaring ArrayList ae final in java

public

System.

}

}
o/p:2
 we can add the objects to the final declared ArrayList.

if We want to prevent it we need to  use Collections.unmodifiableList()

public

System.

}

} class SampleTest {public static final List<String> list =Collections.unmodifiableList(new ArrayList<String>());public static void main(String[] args){list.add("ABC");list.add("BCD");out.println(list.size()); class SampleTest {public static final ArrayList<String> list =new ArrayList<String>() ;public static void main(String[] args){list.add("ABC");list.add("BCD");out.println(list.size());o/p :java.lang.UnsupportedOperationException

at java.util.Collections$UnmodifiableCollection.add(

at com.jnet.test.SampleTest.main(

Now we are not able to modify the List

Collections.java:1018)SampleTest.java:11)

Exception in thread "main"