Question

The ExceptionLab class provided: – Creates an array of 100 elements and fills it with random numbers from 1 to 100. – It asks the user for an index value between 0 and 99. – Prints the element at that position. – If a number > 99 is entered by the user, the class will abort with an ArrayIndexOutOfBoundsException • Modify the ExceptionLab: – Add a try-catch clause which intercepts the ArrayIndexOutOfBounds and prints the message: Index value cannot be greater than or equal to 100. The array can only hold 100 elements – Add a finally clause which prints the entries in the Array. – Print 20 elements on each line of output. See the sample output.

Computer Organization and Programming 43/47 in class 42 Sample runs The Array has been filled with random numbers Enter an index value from 0 to 99 The element at index 8 is 67 The Array 77 20 96 50 46 84 57 56 67 52 12 63 47 22 42 58 34 37 5 15 84 61 74 71 85 5 78 12 72 3 72 39 83 35 55 11 47 72 44 33 12 60 55 58 92 48 48 52 60 69 90 90 26 75 92 100 10 65 49 93 74 92 95 93 47 72 52 60 20 23 76 88 22 9 13 66 25 14 36 30 32 60 29 49 35 13 55 68 98 19 83 89 42 15 22 72 66 88 39 3 The Array has been filled with random numbers Enter an index value from 0 to 99 100 Index value cannot be 100 Array contains 100 elements The Array 45 44 54 66 46 42 60 99 44 18 90 55 71 12 80 71 57 35 62 2 51 37 1 15 35 67 71 97 34 86 15 7 36 57 24 16 17 51 56 60 54 55 21 65 57 69 33 64 40 26 73 47 80 14 10 81 53 41 17 18 94 76 28 16 12 4 45 97 39 11 77 32 65 1 61 61 42 31 71 51 76 63 42 39 59 74 94 55 99 72 56 70 19 64 95 4 97 67 77 17

import java.util.*;

public class ExceptionLab {

public static void main(String[] args) {

Scanner reader = new Scanner (System.in);

int [] numbers = new int [100];

for (int i = 0; i < 100; i++)

{

numbers [i] = (int)(Math.random() * 100 + 1);

}

System.out.println("Enter an index value from 0 to 99");

int index = reader.nextInt();

//the statement following should be in the try clause

System.out.println( numbers [index]);

//add catch and finally

}

}

Answer 1

import java.util.*;

public class ExceptionLab {

public static void main(String[] args) {

Scanner reader = new Scanner (System.in);

int [] numbers = new int [100];

for (int i = 0; i < 100; i++)

{

numbers [i] = (int)(Math.random() * 100 + 1);

}

System.out.println("The Array has been filled with random numbers");

System.out.println("Enter an index value from 0 to 99");

int index = reader.nextInt();

//the statement following should be in the try clause

try{

System.out.println( "The element at the index "+index+" is "+numbers [index]);

}catch(ArrayIndexOutOfBoundsException e){

System.out.println("Index value cannot be greater than or equal to 100\nArray contains 100 elements");

}

finally{

System.out.println("The Array");

for(int i=0;i<numbers.length;i++){

if(i%20==0 && i!=0) System.out.print("\n");

System.out.print(numbers[i]+" ");

}

}

}

}

null