Java String Introduction with Explanation

06 Feb Java String Introduction with Explanation

Hello Friends, How are you? Today I am going to solve the HackerRank Java String Introduction Problem with a very easy explanation. In this article, you will get more than one approach to solve this problem. So let’s start- {tocify} $title={Table of Contents}

“A string is traditionally a sequence of characters, either as a literal constant or as some kind of variable.” — Wikipedia: String (computer science)

This exercise is to test your understanding of Java Strings. A sample String declaration:

String myString = “Hello World!” {codeBox}

The elements of a String are called characters. The number of characters in a string is called the length, and it can be retrieved with the String.length() method. Given two strings of lowercase English letters, A and B, perform the following operations:

1. Sum the lengths of A and B.
2. Determine if A is lexicographically larger than B (i.e.: does B come before A in the dictionary?).
3. Capitalize the first letter in A and B and print them on a single line, separated by a space.

The first line contains a string A. The second line contains another string B. The strings are comprised of only lowercase English letters. There are three lines of output: For the first line, sum the lengths A of and B. For the second line, write Yes if A is lexicographically greater than B otherwise print No instead. For the third line, capitalize the first letter in both A and B and print them on a single line, separated by a space.

hello java {codeBox}

9 No Hello Java {codeBox}

String A is “hello” and B is “java”. A has a length of 5, and B has a length of 4; the sum of their lengths is 9. When sorted alphabetically/lexicographically, “hello” precedes “java”; therefore, A is not greater than B and the answer is No. When you capitalize the first letter of both A and B and then print them separated by a space, you get “Hello Java”.

import java.io.*;
import java.util.Scanner; public class Solution { public static void main(String[] args) { /* Save input */ Scanner scan = new Scanner(System.in); String A = scan.next(); String B = scan.next(); scan.close(); /* Sum lengths */ System.out.println(A.length() + B.length()); /* Compare lexicographical ordering */ System.out.println(A.compareTo(B) > 0 ? "Yes" : "No"); /* Print the Strings in desired format */ System.out.println(capFirstLetter(A) + " " + capFirstLetter(B)); } private static String capFirstLetter(String str) { if (str == null || str.length() == 0) { return ""; } else { return str.substring(0,1).toUpperCase() + str.substring(1);
        }
    }
}

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