Java OCA OCP Practice Question 3198

Question

Consider the following program: 

public class Main {
        public static void foo() {
                try {
                        throw new ArrayIndexOutOfBoundsException();
                } catch(ArrayIndexOutOfBoundsException oob) {
                        RuntimeException re = new RuntimeException(oob);
                        re.initCause(oob);
                        throw re;
                }/*  w  w  w  .ja v a2s.c o m*/
        }
        public static void main(String []args) {
                try {
                        foo();
                } catch(Exception re) {
                        System.out.println(re.getClass());
                }
        }
}

When executed, this program prints which of the following?

  • A. class java.lang.RuntimeException
  • B. class java.lang.IllegalStateException
  • C. class java.lang.Exception
  • D. class java.lang.ArrayIndexOutOfBoundsException


B.

Note

In the expression new RuntimeException(oob);, the exception object oob is already chained to the RuntimeException object.

The method initCause() cannot be called on an exception object that already has an exception object chained during the constructor call.

Hence, the call re.initCause(oob); results in initCause() throwing an IllegalStateException.




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