get user input while the entry is 0

Question

1.00/5 (1 vote)

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Hello,

I want to make a program where the user can enter numbers (any number-2,-3,-4,0,100;1000)
until he enters 0.
I have an error at the while loop,scanner is not compatible with int,how can i get rid of that? Something is missing and i dont know what.Help pls. (sry if i wrote stupid things im new )

my code so far:

C#

public static void main(String[] args) {

       // int[] list = new int[10];
        int i;

        System.out.println("Enter numbers :");
        Scanner input = new Scanner(System.in);

        for (i = 1; i < 100; i++) {
            while (input != 0){         // problem here , incompatible Scanner and int
             i = input.nextInt();
            }


        }

    }

XML

Ok. so i get what you said and ty for your help,but its not working with 0.only numbers more then 0.If i neter 0 i get





Exception in thread &quot;main&quot; java.util.regex.PatternSyntaxException: Unclosed character class near index 525
(([-+]?(((((?i)[]|\p{javaDigit})++)|([\p{javaDigit}&amp;&amp;[^0]]((?i)[]|\p{javaDigit})?((?i)[]|\p{javaDigit})?(\,((?i)[]|\p{javaDigit})((?i)[]|\p{javaDigit})((?i)[]|\p{javaDigit}))+)))))|(((((?i)[]|\p{javaDigit})++)|([\p{javaDigit}&amp;&amp;[^0]]((?i)[]|\p{javaDigit})?((?i)[]|\p{javaDigit})?(\,((?i)[]|\p{javaDigit})((?i)[]|\p{javaDigit})((?i)[]|\p{javaDigit}))+)))|(\Q-\E((((?i)[]|\p{javaDigit})++)|([\p{javaDigit}&amp;&amp;[^0]]((?i)[]|\p{javaDigit})?((?i)[]|\p{javaDigit})?(\,((?i)[]|\p{javaDigit})((?i)[]|\p{javaDigit})((?i)[]|\p{javaDigit}))+)))

like this:

&lt;pre lang=&quot;cs&quot;&gt;public static void main(String[] args) {


         int i;

            System.out.println(&amp;quot;Enter numbers :&amp;quot;);
            Scanner input = new Scanner(System.in);

            for (i = 1; i &amp;lt; 100; i++) {
                while (input.hasNextInt(8)){        //need 0 here
                 i = input.nextInt();

                //if(input.hasNextInt()){


                 }

                }



    }

}&lt;/pre&gt;</pre>

Posted 21-Mar-15 3:55am

Member 11524654

Updated 21-Mar-15 6:00am

v4

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Afzaal Ahmad Zeeshan 21-Mar-15 10:13am

It is always better to at least first know the language and the API you're going to use. See solution 1.

2 solutions

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phil.o · Answer 1 · 2015-03-21T04:04:00

Solution 1

Java

while (input.hasNextInt()) {
   // ...
}

Maybe a look at Class Scanner[^] would give some useful examples of its usage.

Posted 21-Mar-15 4:04am

phil.o

Comments

Afzaal Ahmad Zeeshan 21-Mar-15 10:12am

+5 for giving him the accurate answer. :)

phil.o 21-Mar-15 10:23am

Thanks for the "virtual" five ^^

Afzaal Ahmad Zeeshan 21-Mar-15 10:26am

I did receive 1 point for up-voting your answer. :laugh:

phil.o 21-Mar-15 10:29am

No problem, really. What would be interesting to know is what the OP has managed to do with this answer.

Member 11524654 21-Mar-15 10:45am

its not working with 0 as i posted below

phil.o 21-Mar-15 11:41am

input.hasNextInt(8)
Are you working with octal numbers? Or do you assume something else from hasNextInt(int radix) method?
Did you read method's usage?
And please delete solution 2, which is not an answer. Better improve your question instead.

Member 11524654 21-Mar-15 12:02pm

yah i did.i work with normal numbers. So as i said in my first post i want to stop getting inputs from user when he enters 0., 0 to be the last entered number.And if i enter 0 in that method it gives me no error only exception after u run it

Member 11524654 · Answer 2 · 2015-03-21T14:44:00

import java.util.ArrayList;
import java.util.Scanner;

public class SuccesiuneDeNumerePanaLa0 {

public static void main(String[] args) {

int sum = 0;

ArrayList<integer> negative_list = new ArrayList<integer>();
ArrayList<integer> pozitive_list = new ArrayList<integer>();

System.out.println("Enter number to the list: ");

Scanner input = new Scanner(System.in);

while (input.hasNextInt()) {

int i = input.nextInt();
if (i < 0) {
negative_list.add(i);
}
if (i == 0) {
break;
}
if (i > 0) {
pozitive_list.add(i);

}

for (int j : pozitive_list) {
sum += j;
}

}

System.out.println(" " + sum);
System.out.println(" " + negative_list.size());

}

}