Searching for specific value in array with while-loop

Question

I have the task to build a method to search for an identical value for a variable in an array. When there is a match, the method will return the index-Position, otherwise it should return -1.

My method works when there is a match, but I get an error when there isn´t any match.

My Code so far:

public class Schleifentest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int [] cherry = {7,5,6,8,9};
        int magNumber = 112;
        int enthalten2 = Schleifentest.sucheWhile(cherry, magNumber);
        System.out.println(enthalten2);


    }

    public static int sucheWhile(int [] array, int a) {
        int i = 0;
        while(i <= array.length) { 
            if (array[i] == a) {
                return i;
            }
            i++;

        }
        // here is the problem
        return -1;
    }

}

Thanks for your help. Phil

What is the error?

Bathsheba
– Bathsheba

2016-11-09 15:48:31 +00:00
Commented Nov 9, 2016 at 15:48 — Bathsheba
– Bathsheba, Commented Nov 9, 2016 at 15:48

Andrea · Accepted Answer · 2016-11-09 15:51:27Z

1

it should be

while(i < array.length) {...}

suppose that the array has 10 elements. They are indexed from 0 to 9. When you reach the end, with your code, you'll consider the one indexed as 10, that doesn't exist, and you have the error.

edited Nov 9, 2016 at 15:51

answered Nov 9, 2016 at 15:48

Andrea

6,1252 gold badges31 silver badges59 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Incepter Over a year ago

that indexoutofbound through

Collectives™ on Stack Overflow

Searching for specific value in array with while-loop

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related