Cracking Core Java Interviews 3rd Edition

A Comprehensive Guide to Crack Core Java Interviews in Investment Banks, HealthCare IT & Startups. It covers Core Java, Algorithms, Data Structures, Concurrency, Hibernate and Spring MVC.

Specifically for investment banking domain, healthcare IT and product companies i.e. UBS, RBS, Blackrock, Morgan Stanley, JP Morgan, Nomura, Barclays, Citibank, Markit, Bank of America, Goldman Sachs and other companies i.e. Global Logic, Adobe, hCentive, Edifecs, Expedia, Infosys, TCS, Sapient, Wipro, HCL etc.
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3rd Edition
Last Updated : Friday, December 4, 2015 3:53:52 PM IST Total Page Hits 734

If a method throws NullPointerException in the superclass, can we override it with a method which throws RuntimeException?

The Answer is Yes.

In Order to understand this Question, you must know the rules for method overriding in Java

  1. You are free to throw any kind of Runtime Exception in the overriding class (not applicable for checked exception)
  2. You shall only throw same or narrowed checked exception (same or sub-class)
  3. The argument list must exactly match that of the overridden method. If they don’t then it will result in overloading rather than overriding.
  4. The return type must be a covariant type (same class or sub-class), i.e. you can narrow down the return type.

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