Taking an input,checking if it's an integer and putting it into a String

Question

The program gets an integer from the user and gets a line from user and checks if they are integer and keeps them if they are.

I want to get a line from user in a loop that checks if each value is an integer or not,and then put it into a string of characters.(I will be using the values as integer later). I tried getting the values as an integer from the first, but it still doesn't work(?)(I printed it and got 0) This is my overall work:


    package spaceship;

    import java.util.Scanner;

    public class SpaceShip {

        static int meteorNumber; //For taking the numbers of meteors in the beginning of the game.
        static String firstLine=""; //For taking the values of the first line.
        static String secondLine=""; //For taking the values of the second line.
        static int i; //Used for the loops.

        public static void gamePlace() {

            Scanner get = new Scanner(System.in); //For taking the values from user.

            System.out.println("Please enter your desired number of meteors and the first line:");
            meteorNumber = get.nextInt();

            for(i=0;i<7*meteorNumber;i++) {
                if(get.hasNextInt() || get.hasNextDouble())
                    firstLine +=  String.valueOf(i);
            }

            System.out.println(firstLine);
        }


        public static void main(String[] args) {
            gamePlace();
        }


    }

input should be something like this:

The first line of the input in this picture is meteorNumber+firstLine. I have yet to write the code for the second line.

So for the first line,I want to keep the integer values so that I can use them later.I will probably store them in some kind of character array first,but for some reason the string doesn't take the integer values.

What is the exactly purpose of the first line? I mean, you enter a number and then a line of something, and that line you want to check whether it's a number or not? In that check, char per char or the whole line? — Josep, Jun 05 '20 at 19:49
when you post your code , try to give the sample input and output for better understanding of the question — Rishabh Ankit, Jun 06 '20 at 06:42

score 0 · Answer 1 · answered Jun 05 '20 at 19:41

0

Your code has many problem First is input with Scanner See here. Second is static String firstLine; You must declare first like static String firstLine = "".

Goodluck to you @@

answered Jun 05 '20 at 19:41

Puskin

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Taking an input,checking if it's an integer and putting it into a String

1 Answers1