print white space

Quote:

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Originally Posted by Norm

Why compact? What is the requirement for compact?

args from command line to be "10" <<<<- note args is a String array, not an int

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OK no problem; suppose a conversion after get it from command line; I just wanted put emphasis on the fact that I need a general way to do it (no assumptions on the size of the string)
Requirements? I need something of a line to create it, just an instruction.

To create a String of blanks of length n, concatenate some blank strings together until you have the length == n. Many ways to do this. Most involve a loop somewhere, either in your code or in the method that is called.

A loop is not a HIT!

Quote:

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Originally Posted by mickey0

Requirements? I need something of a line to create it, just an instruction.

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Have you seen dlorde's post #9? His suggestion is a good solution. It's probably not as short as you want, but to get what (I think) you want you have to create a method, in which case I don't understand why so much insistence in it being "compact".

To summarise, you want something "compact" you can use to insert a certain (unbounded) number of spaces in a String, for example:

Code:

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for (int i = 5; i >= 0; i--) {
        System.out.println(space(i) + "Hello World!");
}

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For that you need to create the space method:

Code:

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String space(int i) {
        return i == 0 ? "" : String.format("%" + i + "s", "");
}

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Fine, nothing shorter than String.Format?

Is it possible to do this avoiding the exception while 'i' is zero?

Code:

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for (int i=5; i >=0; i--) {
  System.out.println("Hello " + String.format("%" + i + "s", "")    );
}

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I mean to change the StringFormat to avoid exception and not the for.

thanks

Quote:

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Is it possible to do this avoiding the exception while 'i' is zero?
Code:
for (int i=5; i >=0; i--) {
System.out.println("Hello " + String.format("%" + i + "s", "") );
}

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Good grief, why are you making something so simple into a nightmare. You have been told several times to create a method to return the spaces and yet you are still trying to put it into one line. If you use the method jcaccia gave you it handles a zero space.

BTW In the code above your spaces are after the "Hello" and not before it as you originally requested.

Add a conditional test for the case of i == 0: (condition) ? "" : format...

Quote:

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Originally Posted by mickey0

Is there a compact way to create a white space string in a shot inside "createWhiteSpace(int num)" ? I thight to use stringFormat even I don't know how; other ideas? (compact, please)

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I already showed you how to do it with String.format, and yes, it is 'compact' - though why that matters, I don't know.

If you're going to ask for help, it makes sense and it's only polite to read and try to understand the replies - if you don't understand them, just ask.

Why do we never have time to do it right, but always have time to do it over?
Anon.

try a simpler soultion:

Code:

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string.Empty.PadLeft(i, ' ');

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Quote:

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try a simpler soultion:

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It would be simpler if it was Java code, unfortunately it's isn't any part of the JDK I know of. It does look suspiciously like .NET code though.

Yes you are right
must have been one of those days for me that I logged on here sleepy.

Don't worry, we all have days like that.