print white space

Hello,
is there any chance to do it in a fashion way?

Code:

---

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

---

I want get this:

Code:

---

    Hello world!
  Hello world!
  Hello world!
 Hello world!
Hello world!

---

thanks

A techique to generate a String of blanks:
Have a String of enough blanks/spaces for the largest request
Use the substing method with an expression based on i to extract as many spaces as are needed for this usage.

Quote:

---

Originally Posted by Norm

A techique to generate a String of blanks:
Have a String of enough blanks/spaces for the largest request
Use the substing method with an expression based on i to extract as many spaces as are needed for this usage.

---

I don't understand what you mean; only thing I got is use StringBuilder s = new StringBuilder(); and then do s.setLength(s.length()-1); for each iteration.
but I need somethin smater and at low level

Something like this:

Code:

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"                                ".substring(0, i);

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OK, isn't there a way to don't use substring method ? I mean to use just the 'i' ?

i is an int. What you want is a String of blanks. I don't know how to convert an int to a String of blanks.

Perhaps you are thinking of the printf() method. It has a way of formatting data that could include leading blanks.

Quote:

---

Originally Posted by Norm

i is an int. What you want is a String of blanks. I don't know how to convert an int to a String of blanks.

Perhaps you are thinking of the printf() method. It has a way of formatting data that could include leading blanks.

---

yes, I can change it, i've already seen it but don't know how formatting it...
EDIT: can Regex even help? Don't know how BTW

regex is for pattern matching. I don't know if you can generate strings based on the value of an int using it.

Write your own method to return the number of spaces you want:
String spaces(int numberOfSpaces) { ...

The String.format method can do padding:

Code:

---

int length = 20;  // 20 spaces
String foo = String.format("Start of padding:'%1$"+length+"s' end of padding", "");
System.out.println(foo);

---

To me programming is more than an important practical art. It is also a gigantic undertaking in the foundations of knowledge...
Grace Hopper

Another option if you don't mind using a third-party library:

org.apache.commons.lang.StringUtils.repeat

You can get the library here:
http://commons.apache.org/

Yet another option is this code I posted several years ago.

Here is the code snippet....

=============================
for(int i=5;i>=0;i--){
String blankString = new String();

for(int temp = i;temp>0;temp--){
blankString = blankString+" ";
}
System.out.println(blankString+"hello world");
}
}
=============================

for(int temp = i;temp>0;temp--){
blankString = blankString+" ";

Waste of CPU time.

OK thanks but I need something different:

Code:

---

String createWhiteSpace(int num) {
  String spaces = .........................
  return spaces;
}

//main
//let args from command line to be '10'
System.out.println("|" + creatingWhiteSpace(args[0]) + "|" );

---

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)
thanks

Why compact? What is the requirement for compact?

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