You are provided with 3 numbers : input1, input2 and input3. Each of these are four digit numbers within the range >=1000 and <=9999.

You are provided with 3 numbers : input1, input2 and input3.

Each of these are four digit numbers within the range >=1000 and <=9999.
i.e.
1000 <= input1 <= 9999
1000 <= input2 <= 9999
1000 <= input3 <= 9999
You are expected to find the Key using the below formula –

Key = (Hundreds digit of input1 x Tens digit of input2) – (Largest digit of input3)
For e..g. if input1 = 3521, input2=2452, input3=1352, then Key = (5 x 5) – 5 = 20
Assuming that the 3 numbers are passed to the given function, Complete the function to find and return the Key. Full java code​

ANSWER:  (You can use intellij)

package com.company;
import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
   // write your code here
        int key1 =0;
        int key2 =0;
        int key33 = 0;
        int KEY;
        int[] key3 = new int[4];

        Scanner girdi = new Scanner(System.in);
        System.out.println("Please write 1000 <= input1 <= 9999 ");
        int input1 = girdi.nextInt;
        System.out.println("Please write 1000 <= input2 <= 9999 ");
        int input2 = girdi.nextInt;
        System.out.println("Please write 1000 <= input3 <= 9999 ");
        int input3 = girdi.nextInt;

        while(input1 >= 1000) {
            input1 = input1 - 1000;
            input1 = input1;
        }
        while(input1 >= 100) {
            input1 = input1 - 100;
            key1 = key1 + 1;
        }
        while(input2 >= 100) {
            input2 = input2 - 100;
            input2 = input2;
        }
        while(input2 >= 10) {
            input2 = input2 - 10;
            key2 = key2 + 1;
        }

        key3[0]=input3/1000;  
        input3=input3-(1000*key3[0]);

        key3[1]=input3/100;   
        input3=input3-(100*key3[1]);

        key3[2]=input3/10;    
        input3=input3-(10*key3[2]);

        key3[3]=input3;     

        key33 = Arrays.stream(key3).max.getAsInt;

        KEY = (key1 * key2) - key33;

        System.out.println("Hundreds digit of input1 = " + key1);
        System.out.println("Tens digit of input2 = " + key2);
        System.out.println("Largest digit of input3 = " + key33);
        System.out.println("KEY = " + KEY);
        
    }
}