w3resource

Java: Restore the original string by entering the compressed string with this rule

Java Basic: Exercise-238 with Solution

When characters are consecutive in a string, it is possible to shorten it by replacing them with a certain rule. For example, the character string YYYYY, if it is expressed as # 5 Y, it is compressed by one character.
Write a Java program to restore the original string by entering the compressed string with this rule.
However, the # character does not appear in the restored character string.
Note: The original sentences are uppercase letters, lowercase letters, numbers, symbols, less than 100 letters, and consecutive letters are not more than 9 letters.

Input:
Multiple character strings are given. One string is given per line.
Output: The restored character string for each character on one line.

Visual Presentation:

Java exercises: Restore the original string by entering the compressed string with this rule.
Java exercises: Restore the original string by entering the compressed string with this rule.

Sample Solution:

Java Code:

// Importing the Scanner class from java.util package
import java.util.*;

// Main class named "Main"
public class Main {
    public static void main(String[] args) {
        // Creating a Scanner object to read input from the console
        Scanner stdIn = new Scanner(System.in);

        // Prompting the user to input the text
        System.out.println("Input the text:");

        // Reading the input string
        String str = stdIn.next();

        // Iterating through each character in the input string
        for (int i = 0; i < str.length(); ++i) {
            // Checking if the current character is '#'
            if (str.charAt(i) == '#') {
                // Repeating the next character by the specified number of times
                for (int j = 0; j < (str.charAt(i + 1) - '0'); ++j) {
                    // Printing the repeated character
                    System.out.print(str.charAt(i + 2));
                }
                // Skipping the processed characters (the count and the repeated character)
                i += 2;
            } else {
                // Printing the current character as it is
                System.out.print(str.charAt(i));
            }
        }
        // Printing a new line after processing the input string
        System.out.println();
    }
} 

Sample Output:

Input the text:
XY#6Z1#4023
XYZZZZZZ1000023

Flowchart:

Flowchart: Restore the original string by entering the compressed string with this rule.

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Java program to read the mass data and find the number of islands.
Next: Write a Java program to cut out words of 3 to 6 characters length from a given sentence not more than 1024 characters.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Become a Patron!

Follow us on Facebook and Twitter for latest update.

It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.

https://w3resource.com/java-exercises/basic/java-basic-exercise-238.php