In Python, there is a * operator for strings, I'm not sure what it's called but it does this:
>>> "h" * 9
"hhhhhhhhh"
Is there an operator in Java like Python's *?
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8There is no such operator in Java.Marko Topolnik– Marko Topolnik2013-05-29 11:30:02 +00:00Commented May 29, 2013 at 11:30
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7 Answers
Many libraries have such utility methods.
E.g. Guava:
String s = Strings.repeat("*",9);
String s = StringUtils.repeat("*", 9);
Both of these classes also have methods to pad a String's beginning or end to a certain length with a specified character.
answered May 29, 2013 at 11:31
Sean Patrick Floyd
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I think the easiest way to do this in java is with a loop:
String string = "";
for(int i=0; i<9; i++)
{
string+="h";
}
3 Comments
Patashu
Note that if you're going to do a LOT of concatenations, you should use a StringBuilder for performance. (Corollary: If it finishes in a blink of an eye, no optimization needed.)
Sean Patrick Floyd
String+=String in a loop is pure evil
Sean Patrick Floyd
See Effective Java by Josh Bloch, Item 51: Beware the performance of string concatenation
you can use something like this :
String str = "abc";
String repeated = StringUtils.repeat(str, 3);
repeated.equals("abcabcabc");
2 Comments
Paul Bellora
Might want to add a note about where
StringUtils comes from.
Yassering
you r right , you should Use apache libraries (common-lang) .
There is no such operator in Java, but you can use Arrays.fill() or Apache Commons StringUtils.repeat() to achieve that result:
Assuming
char src = 'x';
String out;
with Arrays.fill()
char[] arr = new char[10] ;
Arrays.fill(arr,src);
out = new String(arr);
with StringUtils.repeat()
out = StringUtils.repeat(src, 10);
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- seems to be a repeat operator
Use apache libraries (common-lang) : Stringutils.repeat(str, nb)
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String.repeat(count) has been available since JDK 11. String.repeat(count)
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There is no operator like that, but you could assign the sting "h" to a variable and use a for loop to print the variable a desired amount of times.
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