Print character multiple times

Question

How can I print a character multiple times in a single line? This means I cannot use a loop.

I'm trying to print " _" multiple times.

I tried this method but it's not working:

System.out.println (" _" , s);

s is the variable.

Be in the habit of checking the APIs. I see no example of this method in the [Java 7 API docs for System.out](http://docs.oracle.com/javase/7/docs/api/java/lang/System.html#out). — , Dec 05 '14 at 18:54

Mureinik · Answer 1 · 2014-12-09T18:31:17.723

10

If you can use external libraries, StringUtils.repeat sounds perfect for you:

int s = 5;
System.out.println(StringUtils.repeat('_', s));

EDIT:
To answer the question in the comments - StringUtils.repeat takes two parameters - the char you want to repeat and the number of times you want it, and returns a String composed of that repetition. So, in the example above, it will return a string of five underscores, _____.

edited Dec 09 '14 at 18:31

answered Dec 05 '14 at 18:56

Mureinik

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Can you explain me how can I use StringUtils.repeat ? – Econy3 Dec 09 '14 at 17:54

Paco Abato · Accepted Answer · 2014-12-05T19:02:54.613

5

You can print in the same line with System.out.print(" _"); so you can use a loop. print instead of println does not append a new line character.

for (int i=0; i<5; i++){
    System.out.print(" _");
}

Will print: _ _ _ _ _.

edited Dec 05 '14 at 19:02

answered Dec 05 '14 at 18:56

Paco Abato

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1

The post states no loops – user3871 Dec 05 '14 at 18:59
2

I understand that the no loop condition is consecuence of the need to print in the same line (println doesn't allow it but print does). – Paco Abato Dec 05 '14 at 19:01
@Econy3 you stated no loops in the question? – user3871 Dec 09 '14 at 20:50
@Growler yeah, but that was cuz I wanted in a single line. Paco explained the concept of "println" and "print". – Econy3 Dec 10 '14 at 17:42

score 5 · Answer 3 · answered Dec 05 '14 at 18:59

5

You can use the new Stream API to achieve that. There always be an iteration behind the scenes, but this is one possible implementation.

Stream.generate(() -> " _").limit(5).forEach(System.out::print); // _ _ _ _ _

answered Dec 05 '14 at 18:59

Alexis C.

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Stream API. It never ceases to amaze me. – Marcin Sokolowski Dec 05 '14 at 19:03
2

... or also `IntStream.range(0, 5).forEach(i -> System.out.print(" _"));` – Alexis C. Nov 01 '16 at 21:01

score 1 · Answer 4 · edited Oct 10 '19 at 14:42

1

With one call to print/println, and using your variable "s":

System.out.println(Stream.generate(() -> " _").limit(s).collect(Collectors.joining()))

edited Oct 10 '19 at 14:42

Das_Geek

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answered Dec 05 '17 at 04:08

Robert Field

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score 0 · Answer 5 · edited May 23 '17 at 12:32

0

There isn't a shortcut like what you've posted...

And what do you mean "In a single line"?

If in one line of code... see Mureinik's answer

If print "_" in one line:

Instead:

Print 1 to 10 without any loop in java

    System.out.print("_");
    System.out.print("_");
    System.out.print("_");
    System.out.print("_");
    System.out.print("_");

Or

public void recursiveMe(int n) {
    if(n <= 5) {// 5 is the max limit
        System.out.print("_");//print n
        recursiveMe(n+1);//call recursiveMe with n=n+1
    }
}
recursiveMe(1); // call the function with 1.

edited May 23 '17 at 12:32

Community

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answered Dec 05 '14 at 18:54

user3871

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When stealing and modifying someone else's answer, it's wise to update the comments. Line 2 of the recursive solution should have the comment `// 5 is the max limit` – adamdc78 Dec 05 '14 at 18:56
System.out.println(_); is not a valid Java statement :) – Dec 05 '14 at 18:56
Why not System.out.println('_')? ;) – Dec 05 '14 at 18:57
1

@jdv Yes it is: `int _ = 5; System.out.println(_);` – user4235730 Dec 05 '14 at 19:11
Well played. But not a valid statement /in context/. But I guess we are playing Stupid Java Tricks here. – Dec 05 '14 at 19:14

Print character multiple times

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