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Thread: I dont understand this code ?

  1. #1
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    Default I dont understand this code ?

    why this code only displays four zeros ?????


    public class VargjetUshtrimi2 {

    public static void main (String a []) {
    int r[] = new int[11];
    for (int i = 1 ;i < 10; i++)
    {System.out.println( r[i] );}


    }
    }


  2. #2
    Member Abhilash's Avatar
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    Lightbulb Re: I dont understand this code ?

    String args[], not a[]. You are not initializing an array within the parameters.

    Moreover, your array r is uninitialized. Initialize it with numbers before printing it.

  3. #3
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    Default Re: I dont understand this code ?

    The code works good and its not problem with (String a[]) but i dont know why when i run it only displays four zeros like this
    0
    0
    0
    0

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    Default Re: I dont understand this code ?

    Please post your code correctly per this link.

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    Member Abhilash's Avatar
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    Default Re: I dont understand this code ?

    Because Your array stores "garbage value" for now. You haven't initialized it with numbers, you have just declared it. So it prints 0 as default.

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    Default Re: I dont understand this code ?

    @Abhilash
    String args[], not a[].
    There are no requirements for the name of the String array. a is as good as args.
    I prefer the array notation like this: String[] args
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: I dont understand this code ?

    Thanks Abhilisha

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    Default Re: I dont understand this code ?

    why this code only displays four zeros ?????
    I also don't understand why that code only shows 4 zeros. It should show 9 zeros!!!
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: I dont understand this code ?

    Quote Originally Posted by Abhilash View Post
    Because Your array stores "garbage value" for now. You haven't initialized it with numbers, you have just declared it. So it prints 0 as default.
    In java an array is always automatically initialized when you construct it. You never have garbage data.

  10. #10
    Member Abhilash's Avatar
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    Default Re: I dont understand this code ?

    Actually, by garbage value I means the array does no store anything for now (i.e. it hasn't been initialized in the program). Although java initializes it automatically, but this method shouldn't be used.

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    Default Re: I dont understand this code ?

    Quote Originally Posted by Abhilash View Post
    Actually, by garbage value I means the array does no store anything for now (i.e. it hasn't been initialized in the program).
    Yes of course it does, it is initialized with zeroes. It always is, thats what the java specification says.
    This is a question about teminology. "Garbage Data" does not exist in java. And all variables are always initialized, the compiler makes sure they are.

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    Junior Member lil_misfitss's Avatar
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    Default Re: I dont understand this code ?

    I don't get the question because it does display 9 zeroes. I copied it and ran it. It works!

  13. #13
    Member Abhilash's Avatar
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    Default Re: I dont understand this code ?

    Quote Originally Posted by lil_misfitss View Post
    I don't get the question because it does display 9 zeroes. I copied it and ran it. It works!
    Well, good for you then.

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