Question

JAVA PROBLEMS

1. Update the below method to throw an IndexOutOfBoundsException:

public E get(int index) {
        if (index < 0 || index > numItems) {
            System.out.println("Get error: Index "

                        + index + " is out of bounds.");

            return null;
        }
        return array[index];
}

Hint: Update both the method signature and the method body!

2. Update the below method to include a try-catch block rather than throwing the exception to the caller method

public static void printFile(String fileName, final int[] array) 
           throws IOException {
      File file = new File(fileName);
      PrintWriter out = new PrintWriter(file);
      for (int i = 0; i < array.length; i++) {
          out.println(array[i]);
      }
      out.close();
}

Answer 1

Question 1:

Answer:

The updated method is given below:

public E get(int index) throws IndexOutOfBoundsException {
if (index < 0 || index > numItems) {
//System.out.println("Get error: Index "+ index + " is out of bounds.");
//the below statement will throw and IndexOutOfBoundsException exception
throw new IndexOutOfBoundsException(String.format("Get error: Index "+ index + " is out of bounds"));
//return null;
}
return array[index];
}

Question 2:

Answer:

The updated method is given below:

public static void printFile(String fileName, final int[] array) {
//try block
try() {
File file = new File(fileName);
PrintWriter out = new PrintWriter(file);
for (int i = 0; i < array.length; i++) {
out.println(array[i]);
}
out.close();
}
//catch block
catch (IOException e) {
           e.printStackTrace();
}
}