MopZadachi

------------------------------------Задача1-----------------------------------------
import java.util.Scanner;

public class BiggestDec {
    public static void main(String[] args) {
        Scanner scan= new Scanner(System.in);
        int num = scan.nextInt();
        int max= Integer.MIN_VALUE;
       while (num > 0){
           if (num%10 > max){
               max = num%10;
           }
           num/=10;
       }
        System.out.println(max);
    }
}
------------------------------------Задача2-----------------------------------------
import java.util.Scanner;

public class SumOfNumbers {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int num = scan.nextInt();
        int sum = String.valueOf(num).length();
        System.out.println(sum);
    }
}
------------------------------------Задача3-----------------------------------------
public class CharNum {
    public static void main(String[] args) {
        char [] digits = {'1','5','9','1'};
        String digitsToString = String.valueOf(digits);
        int num = Integer.parseInt(digitsToString);
        System.out.println(num);
    }
}
------------------------------------Задача4-----------------------------------------
public class numberRecursion {
    static boolean ans = false;
    public static boolean isFound(int n, int target) {
        if (n == 0 || n%10 == target){
            if(n%10 == target){
                ans = true;
            }
            return ans;
        }else{
            isFound(n/10,target);
        }
        return ans;
    }

    public static void main(String[] args) {
        System.out.println(isFound(123,2));
    }
}
------------------------------------Задача5-----------------------------------------
public class OddEvenRecursion {
    static int even = 0;
    static int odd = 0;
    public static int oddEven(int n) {
        if (n != 0) {
            int curNum = n % 10;
            if (curNum % 2 == 0) {
                even++;
            } else {
                odd++;
            }
            oddEven(n / 10);
        } else {
            return Math.abs(odd - even);
        }
        return Math.abs(odd - even);
    }

    public static void main(String[] args) {
        System.out.println(oddEven(1952));
    }
}