Java: Find the difference between the largest integer and the smallest integer which are created by 8 numbers from 0 to 9

Last update on May 13 2025 13:00:03 (UTC/GMT +8 hours)

Difference Between Largest and Smallest Integer

Write a Java program to find the difference between the largest integer and the smallest integer. These integers are created by 8 numbers from 0 to 9. The number that can be rearranged starts with 0 as in 00135668.

Input:

Data is a sequence of 8 numbers (numbers from 0 to 9).
Output:
The difference between the largest integer and the smallest integer.

Visual Presentation:

Sample Solution:

Java Code:

// Importing necessary classes for input/output operations and array manipulation
import java.util.*;

// Main class named "Main"
public class Main {
    
    // Main method to execute the program
    public static void main(String[] args) {
        // Creating Scanner object to read input from the user
        Scanner sc = new Scanner(System.in);
        
        // Prompting the user to input an integer created by 8 numbers from 0 to 9
        System.out.println("Input an integer created by 8 numbers from 0 to 9:");
        
        // Reading the input string
        String s = sc.next();
        
        // Initializing an array to store individual digits of the input integer
        int[] num = new int[8];
        
        // Extracting each digit from the input string and storing it in the array
        for (int i = 0; i < 8; i++) {
            num[i] = Integer.valueOf(s.substring(i, i + 1));
        }
        
        // Sorting the array in ascending order
        Arrays.sort(num);
        
        // Initializing variables to calculate the smallest and largest integers
        int a = 0;
        int b = 0;
        int c = 1;
        
        // Calculating the smallest and largest integers from the sorted array
        for (int i = 0; i < 8; i++) {
            a += num[i] * c;
            b += num[7 - i] * c;
            c *= 10;
        }
        
        // Outputting the difference between the largest and smallest integers
        System.out.println("Difference between the largest and the smallest integer from the given integer:");
        System.out.println(a - b);
    }
} 

Sample Output:

Input an integer created by 8 numbers from 0 to 9:
567894321
Difference between the largest and the smallest integer from the given integer:
75308643

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to compute the difference between the largest and smallest numbers in an array after removing duplicates.
• Write a Java program to find the difference between the largest and smallest integers formed by rearranging the digits of a given number.
• Write a Java program to calculate the difference between the maximum and minimum values in a sequence while excluding outliers.
• Write a Java program to compute the difference between the largest and smallest integers in an array sorted using a custom comparator.

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• Java Basic Part-II Programming Exercises Home ↩
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