Programming Forums > Application Development > Java

squishiful · Jun 27th, 2005, 5:24 PM

Is there anyway to find the number of spaces in a String? Thanx!

Mjordan2nd · Jun 27th, 2005, 5:28 PM

Lets say you have String a:

String [] temp = a.split(" ");
System.out.println(temp.length);

That would be an easy way to do it. You could look through and count if you wanted, as well with a loop.

squishiful · Jun 27th, 2005, 5:30 PM

perfect!
thanx!

VigilanteP@comcast.net · Jul 6th, 2005, 1:14 PM

Quote:

Originally Posted by Mjordan2nd

Lets say you have String a:

(Toggle Plain Text)

String [] temp = a.split(" ");
System.out.println(temp.length);

That would be an easy way to do it. You could look through and count if you wanted, as well with a loop.

That won't work.

If string a is "hello world" then temp's length will be 2 since it will split the string at the space. Obviously there is only one space.

It should be

(Toggle Plain Text)

System.out.println(temp.length - 1);

skuinders · Jul 6th, 2005, 2:09 PM

those wont capture spaces at the end of a string.

(Toggle Plain Text)

String a = "hello world  "; // 3 spaces

(Toggle Plain Text)

count = a.split(" ").length-1; // count == 1

I think the classic approach is probably the way to go:

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for (int i=0; i<a.length(); i++) {
   if(a.charAt(i)==' ')
	  count++;
} // count == 3

mackenga · Jul 6th, 2005, 5:06 PM

...heh heh heh...or:

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while (i < a.length())
  count += a.charAt(i++) == ' ' ? 1 : 0;

Sorry, the evil laugh was because that's just a less readable version. I can never resist the opportunity to use the post-increment or the compact conditional to reduce the clarity of perfectly good C or C-like code.

Mjordan2nd · Jul 6th, 2005, 6:43 PM

Yea, temp.length-1. I didn't think of that.

Quote:

Originally Posted by skuinders

those wont capture spaces at the end of a string.

And yea, didn't quite think of that either. I guess the loop would be the way to go then.

Jun 27th, 2005, 5:24 PM	#1
squishiful Programmer Join Date: Jun 2005 Location: Amittyville Posts: 60 Rep Power: 4	finding the number of spaces in a String Is there anyway to find the number of spaces in a String? Thanx! __________________ I steal hippos...

Jun 27th, 2005, 5:28 PM	#2
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	Lets say you have String a: (Toggle Plain Text) String [] temp = a.split(" "); System.out.println(temp.length); String [] temp = a.split(" "); System.out.println(temp.length); That would be an easy way to do it. You could look through and count if you wanted, as well with a loop. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower Last edited by Mjordan2nd; Jun 27th, 2005 at 5:38 PM.

Jun 27th, 2005, 5:30 PM	#3
squishiful Programmer Join Date: Jun 2005 Location: Amittyville Posts: 60 Rep Power: 4	perfect! thanx! __________________ I steal hippos...

Jul 6th, 2005, 2:09 PM	#5
skuinders Hobbyist Programmer Join Date: Jun 2005 Location: MA, US Posts: 204 Rep Power: 4	those wont capture spaces at the end of a string. (Toggle Plain Text) String a = "hello world "; // 3 spaces String a = "hello world "; // 3 spaces (Toggle Plain Text) count = a.split(" ").length-1; // count == 1 count = a.split(" ").length-1; // count == 1 I think the classic approach is probably the way to go: (Toggle Plain Text) for (int i=0; i<a.length(); i++) { if(a.charAt(i)==' ') count++; } // count == 3 for (int i=0; i<a.length(); i++) { if(a.charAt(i)==' ') count++; } // count == 3 __________________ "A stupid man's report of what a clever man says can never be accurate, because he unconciously translates what he hears into something he can understand." - B. Russell http://web.bryant.edu/~srk2

Jul 6th, 2005, 5:06 PM	#6
mackenga Professional Programmer Join Date: Mar 2005 Location: Glasgow, Scotland Posts: 328 Rep Power: 4	...heh heh heh...or: (Toggle Plain Text) while (i < a.length()) count += a.charAt(i++) == ' ' ? 1 : 0; while (i < a.length()) count += a.charAt(i++) == ' ' ? 1 : 0; Sorry, the evil laugh was because that's just a less readable version. I can never resist the opportunity to use the post-increment or the compact conditional to reduce the clarity of perfectly good C or C-like code.

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Programming Forums > Application Development > Java

finding the number of spaces in a String