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Thread: A rather unusual for loop

  1. #1
    Kagiso is offline Member
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    Default A rather unusual for loop

    Given the code. What is the output?
    1. public static void main(String args[]) {
    2. Object myObj = new String[]{"one", "two", "three"};{
    3. for (String s : (String[])myObj) System.out.print(s + ".");
    4. }
    5. }

    it turns out the output is one.two.three
    and I was so convinced it wouldn't compile

    for(String s :(String[] myObj) // can anyone kindly explain this line to me

    because I'm only used to for loops that are written like this:
    for(int i ; i<myObj.length; i++)

  2. #2
    pbrockway2 is offline Moderator
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    Default Re: A rather unusual for loop

    It's called an "enhanced for loop". Although other languages often call it a "for each loop".

    The for Statement (The Java™ Tutorials > Learning the Java Language > Language Basics)

    (Ask if something in that tutorial is unclear.)
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  3. #3
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    JosAH is offline Moderator
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    Default Re: A rather unusual for loop

    Not that it matter much, but the output is "one.two.three." (a dot after "three").

    kind regards,

    Jos
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    cenosillicaphobia: the fear for an empty beer glass

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