Here is the optimized solution in Java. Copy or view it below.
Java
package Problems_On_Number;
import java.util.Scanner;
public class MaxMinDigitInNumber {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("enter the number:");
int n = sc.nextInt();
int max = Integer.MIN_VALUE;
int min = Integer.MAX_VALUE;
while (n > 0) {
int temp = n % 10;
max = Math.max(max, temp);
min = Math.min(max, temp);
n /= 10;
}
System.out.println("the Maximum Digit is " + max);
System.out.println("the minimum digit is " + min);
sc.close();
}
}