Chapter 11, Problem 1.1SRE

Program Plan Intro

Program Plan

To list the types of exceptions that may occur during compiling or run time of a java program.

Program Description Answer

ClassCastException, NullPointerException, ArithmeticException, IndexOutOfBoundsException, and IOException are the five types of exceptions that are commonly occurring during the program execution.

Explanation of Solution

In a high-level programming language, exception and error handling are the key factors that make the program defend from compile time or run time errors. Java implements the Exception handling mechanism with two packages namely (java.lang) and (java.io). Five types of exceptions occur in common and are listed below:

Run Time Exceptions (or Unchecked Exceptions)

1. ClassCastException- this type of exception occurs when a programmer tries to cast an object of the parent class to its child class type or to cast an object of one class to an object of another class that is not extending the former.
2. NullPointerException- occurs when a method calls the instance of an object which is null or tries to access, modify, to access the length of a null value. If a programmer wants to access elements of an array without initializing it then NullPointerException is thrown.
3. ArithmeticException- occurs when an exceptional condition occurs while doing an arithmetic operation such as Divide by Zero.
4. IndexOutOfBoundsException- occurs when an index of a string or an array is negative or greater than the size of an object.
5. IOException- occurs when an interrupt arises during input-output operation or it is failed.