Created two ten arrays but first and third tests still not passing

Question about the task

Under discussion

package com.codegym.task.task07.task0705;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/*
One large array and two small ones

*/

public class Solution {
    public static void main(String[] args) throws Exception {
        Integer[] twenty = new Integer[20];
        Integer[] first = new Integer[10];
        Integer[] second = new Integer[10];
        BufferedReader bsi = new BufferedReader(new InputStreamReader(System.in));
        for (int i = 0; i < 20; i++)
        {
        String l = bsi.readLine();
        twenty[i] = Integer.parseInt(l);
        //System.out.println(twenty[i]);
        }

        for (int i = 0; i <10; i++)
        {
            first[i] = twenty[i];
        }
        for (int j = 10; j < 20; j++)
        {
            second[j-10] = twenty[j];
            System.out.println(second[j-10]);
        }
    }
}

1. Create an array of 20 numbers.
2. Populate it with values from the keyboard.
3. Create two arrays of 10 numbers each.
4. Copy the large array into the two small ones: half the numbers into the first small array, and the second half into the second small array.
5. Display the second small array, each value on a new line.

Requirements:

The program must create an array of 20 integers.
The program should read 20 numbers from the keyboard for the large array.
The program must create two small arrays of 10 numbers each.
The program must copy one half of the large array into the first small array, copy the second half into the second array, and then display that array on the screen.

package com.codegym.task.task07.task0705; import java.io.BufferedReader; import java.io.InputStreamReader; /* One large array and two small ones */ public class Solution { public static void main(String[] args) throws Exception { Integer[] twenty = new Integer[20]; Integer[] first = new Integer[10]; Integer[] second = new Integer[10]; BufferedReader bsi = new BufferedReader(new InputStreamReader(System.in)); for (int i = 0; i < 20; i++) { String l = bsi.readLine(); twenty[i] = Integer.parseInt(l); //System.out.println(twenty[i]); } for (int i = 0; i <10; i++) { first[i] = twenty[i]; } for (int j = 10; j < 20; j++) { second[j-10] = twenty[j]; System.out.println(second[j-10]); } } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

15 April 2021, 15:10

try making the arrays int[] and not Integer[]

Guadalupe Gagnon

Level 37 , Tampa, United States

15 April 2021, 15:15

a tip: Take the conditions, copy them into your code as notes, then follow them as a road map to the final solution. The instructions are not always the most efficient way to code, however you will have a better chance of avoiding angering the validation system. That system checks you code not only that it arrives at the correct output, but also that the steps are followed. It can be very strict in that last part. So:

//1. Create an array of 20 numbers.
create the array here of 20 numbers

//2. Populate it with values from the keyboard.
add 20 values from the keyboard here

//3. Create two arrays of 10 numbers each.
create an array of 10
create another array of 10

//4. Copy the large array into the two small ones: half the numbers into the first small array, and the second half into the second small array.
copy the large array into the 2 smaller arrays here

//5. Display the second small array, each value on a new line.
display the small array here

I've seen plenty of tasks fail that arrived at the technically correct result, but skipped steps specifically spelled out in the instructions.

Edward Rickers

Level 15 , Washington, United States

15 April 2021, 19:51

Thank you! That did it. Also thank you for the tip

Guadalupe Gagnon

Level 37 , Tampa, United States

15 April 2021, 20:01

Some tasks the validator is very lenient, other tasks it fails even the slightest step off the path it lays out. There is no way to tell which one is which, but if you can follow this most of the time you won't won't even notice the strict tasks that often.