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Thread: Printf Left Justify?

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    Post Printf Left Justify?

    Hey guys, just signed up. I'm currently at school in a CSI 1001 class and we're learning printf with JGrasp as the environment at the moment. I've looked all over the internet for help but they all have the same answer.

    Heres the problem.

    I have a string as this:

    String header1 = new String ("Caswell Catering and Convention Service");

    as for the printf line, its this:

    System.out.printf ("%-5s/n", header 1);

    The output is right justified no matter the use of the "-" or without and I can't seem to find the correct thing to do to make it left justified. Let me know what I'm doing wrong. If you guys need my whole code for this, please let me know, I'm pretty new to java and this forum in general so take it easy on me ;p.


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    Default Re: Printf Left Justify?

    When you say left-justified are you talking about the text printing up against the left
    margin of the screen? I compiled your sample code and that is where my output was.

    If it is appearing like this:

               This is an output sample

    Then it could be an option in your IDE that needs setting. I've never used
    JGrasp myself so I cannot help you there. Take a look at the help files
    and documentation.

    Wishes Ada xx
    If to Err is human - then programmers are most human of us all.
    "The Analytical Engine offers a new, a vast, and a powerful language . . .
    for the purposes of mankind
    ."
    Augusta Ada Byron, Lady Lovelace (1851)

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    Default Re: Printf Left Justify?

    Hey Ada, thanks for the response. Yes, I'm talking about the text print from the left margin. IDE are you using? I'd love to try different ones.

    My output that I'm getting is this:

    Caswell Catering and Convention Service
    Final Bill
    -------------------------------------------

    As you can see, the text is not giving the proper output I want. If you could provide me some advice, I'd be grateful. Thanks!

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    Super Moderator Norm's Avatar
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    Default Re: Printf Left Justify?

    the proper output I want.
    Can you post an example of what you want? Be sure to wrap it in code tags to preserve its formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Printf Left Justify?

    Screen Shot 2014-09-07 at 6.14.20 PM.jpg

    This is an example given to me by my instructor. This is the output I'm trying to achieve. And can you tell me how to code tag? I'm not too far into java as of yet.

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    Default Re: Printf Left Justify?

    That looks right justified: The end of the Strings are against the right side of the area
    When printing:
    The normal placing of Strings is left justified
    numbers are right justified.

    A way I've found to right justify Strings is to pad them with leading spaces to push them right to the desired place.
    |left adjusted      |
    |     right adjusted|
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Printf Left Justify?

    Leading spaces does work, I just tried it. But what I'm trying to do is make a string left justified and make a double right justified.

    like for instance:

    String example1 = "This is a test";

    double example2;
    ----
    System.out.print("Your input was: ");
    example2 = kb.nextDouble();
    ----
    System.out.printf ("%-1s %2f\n", example 1, example 2)


    and I want a output something like:


    (1 space)Your input value was: (next.Double)(2 spaces from left)
    (1 space)>another string: (another double)(2 spaces from left)
    (1 space)>repeat: (repeat)(2 spaces from left)

    This is what I'm doing in repeat
    Screen Shot 2014-09-07 at 10.22.32 PM.jpg

    This is what I have so far. Everything on the printf to the left after the spacing is string and to the right is a double.

    Screen Shot 2014-09-07 at 10.30.22 PM.jpg
    This is my output. Maybe this can explain whats going on?
    Attached Images Attached Images
    Last edited by Sumdude; September 7th, 2014 at 10:31 PM.

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    Default Re: Printf Left Justify?

    what I'm trying to do is make a string left justified and make a double right justified.
    Please copy and post the output here and wrap it in code tags:

    [code=java]
    YOUR OUTPUT GOES HERE
    [/code]
    to get highlighting and preserve formatting.

          System.out.printf ("|%-1s| |%2f|\n", "example 1", 1.2);  
     //|example 1| |1.200000|
    The width's are too small to show adjustment. Enlarge them:
          System.out.printf ("|%-20s| |%20f|\n", "example 1", 1.2);  
     // |example 1           | |            1.200000|
    Above the String is left adjusted and the number is right adjusted.
    If you don't understand my answer, don't ignore it, ask a question.

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