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Why are classes sometimes declared final in Java?
If a class is declared final, you cannot inherit it. If you try it gives you a compile-time error as −
Example
final class Super { private int data = 30; } public class Sub extends Sub { public static void main(String args[]){ } }
Output
Exception in thread "main" java.lang.Error: Unresolved compilation problem: at Sub.main(Sub.java:7)
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