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Thread: Confusion with the question about this coding

  1. #1
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    Default Confusion with the question about this coding

    What does mean by ((int)((string)((int)"7")+"5"))

    The result of i = ((int)((string)((int)"7")+"5"))
    1) An integer i, where i = 12
    b) A String, i where i = 12
    c) A String, i where i = 75
    d) An integer i, where i = 75
    e) An Exception

    I would like to know what does mean by (int)(string) and then ((int)"7")+ "5"))
    Does it mean I need to convert int to string or vice versa?

    public static void printnum1() {

    /*int i = 12;


    /*i = ((int)((string)((int)"7")+"5"));

    System.out.println(i); */

    }
    I'm not following the questions


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    Default Re: Confusion with the question about this coding

    What does mean by ((int)((string)((int)"7")+"5"))
    What happens when you compile that code?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Confusion with the question about this coding

    It shows an error message on i = ((int)((string)((int)"7")+"5")); when I run

    public static void printnum1() {

    int i = 12;


    i = ((int)((string)((int)"7")+"5"));

    System.out.println(i);
    }

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    Default Re: Confusion with the question about this coding

    It shows an error message
    Ok, what is the error message?

    When posting code be sure to wrap your code with code tags:
    [code=java]
    YOUR CODE HERE
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Confusion with the question about this coding

    It says "String can not be resolved to a type or can not cast from String to int"

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    Default Re: Confusion with the question about this coding

    You should copy the error message, not retype it and make mistakes.
    I assume the error message said this:
    string can not be resolved to a type

    The compiler could not find the definition for the class: string
    Java is case sensitive. The java class name is String.

    can not cast from String to int
    A String object can not be cast to an int. No object can be cast to a primitive.
    To convert a String to an int, use the Integer class's parse method.

    Where did that statement come from? What is it supposed to do?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Confusion with the question about this coding

    Obviously you can tell that I'm new to programming...
    I'm kind of confused with i = ((int)((string)((int)"7")+"5")) when question a) says An integer, where i = 12;

    These are test questions that I need to answer.

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    Default Re: Confusion with the question about this coding

    That statement is not a valid java statement.
    You have already posted 2 errors that it has.

    It needs to be rewritten to compile.
    First define what you want the code to do. Then write the code to do it.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Confusion with the question about this coding

    what does mean by ((int)((string)((int)"7")+"5")) ? just could not get through what I need do by this statement

    Thanks

    --- Update ---

    I agree with you, it might be mistaken or purposely given me invalid statement! what you think from your expertise, thank you

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    Default Re: Confusion with the question about this coding

    The statement does not make sense as coded.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Confusion with the question about this coding

    look in java int to String or vice verse is not possible. but in place of " " if u place ' ' and in place of String if u place char data type then ur code look like this ((int)((char)((int)'7')+'5')) and it is a valid expression which mean is that
    "1st u r converting char 7 to its equivalent int type= 55 and char value of 5 is 53 then both 53 and 55 is added result 108 is converted to char again its converted to int so output is 108
    but according to ur question it will give compile time error "inconvertible types" it is not an Exception
    There is lot of difference between Compile time error and Exception
    Last edited by rita khatei; May 14th, 2014 at 02:28 PM.

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