Day 16: Exceptions – String to Integer In Java | 30 Days Of Code | Hackerrank Programming Solutions

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30 Days Of Code Hackerrank

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Link for the Problem – Day 16: Exceptions – String to Integer– Hacker Rank Solution

Day 16: Exceptions - String to Integer – Hacker Rank Solution

Problem:

Objective
Today, we’re getting started with Exceptions by learning how to parse an integer from a string and print a custom error message. Check out the Tutorial tab for learning materials and an instructional video!

Task
Read a string, , and print its integer value; if  cannot be converted to an integer, print Bad String.

Note: You must use the String-to-Integer and exception handling constructs built into your submission language. If you attempt to use loops/conditional statements, you will get a  score.

Input Format

A single string, .

Constraints

  • , where  is the length of string .
  •  is composed of either lowercase letters () or decimal digits ().

Output Format

Print the parsed integer value of , or Bad String if  cannot be converted to an integer.

Sample Input 0

3

Sample Output 0

3

Sample Input 1

za

Sample Output 1

Bad String

Explanation

Sample Case  contains an integer, so it should not raise an exception when we attempt to convert it to an integer. Thus, we print the .
Sample Case  does not contain any integers, so an attempt to convert it to an integer will raise an exception. Thus, our exception handler prints Bad String.

Day 16: Exceptions - String to Integer – Hacker Rank Solution
import java.util.Scanner;

/**
 * @author Techno-RJ
 *
 */
public class Day16ExceptionsStringToInteger {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String S = in.next();
		in.close();
		int i = 0;
		try {
			i = Integer.parseInt(S);
			System.out.println(i);

		} catch (NumberFormatException e) {
			System.out.println("Bad String");
		}
	}
}

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