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Java Forum / First Aid / March 2006convert boolean to String jdk1.3
Hi, How can I convert a primitive boolean to String? cheers, //mikael > How can I convert a primitive boolean to String? There's this static method: String s = Boolean.toString(bool); Or you could have thought up this complex piece of code: String s = bool ? "true" : "false"; /gordon  Signature[ do not email me copies of your followups ] g o r d o n + n e w s @ b a l d e r 1 3 . s e >>How can I convert a primitive boolean to String? > > There's this static method: > > String s = Boolean.toString(bool); quicker and dirtier: s = "" + bool; >quicker and dirtier: > > s = "" + bool; terser and dirtier. There are quicker ways. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. >>How can I convert a primitive boolean to String? > [quoted text clipped - 7 lines] > > /gordon For me standard Java way (for integers and so on): boolean bool; s = "" + bool; worked OK. > For me standard Java way (for integers and so on): > > boolean bool; > s = "" + bool; > > worked OK. To avoid the dummy string-concatenation you should use s = String.valueOf(bool); There are other String.valueOf(...) methods for all primitive types. Signature"Thomas:Fritsch$ops:de".replace(':','.').replace('$','@') > > For me standard Java way (for integers and so on): > > [quoted text clipped - 6 lines] > s = String.valueOf(bool); > There are other String.valueOf(...) methods for all primitive types. It happens that this method uses exactly the same code in Sun's 1.4.2 as Boolean.toString(bool) to do that task. But I've discovered that it's sometimes better to use the static toString method from the appropriate class instead of String.valueOf. String.valueOf(int), for instance, passes on the call to Integer.toString(int, 10) and thus assumes decimal. Likewise for long. In general, though, one or the other of these is far better than simple string concatenation. = Steve = SignatureSteve W. Jackson Montgomery, Alabama >> For me standard Java way (for integers and so on): >> [quoted text clipped - 6 lines] > s = String.valueOf(bool); > There are other String.valueOf(...) methods for all primitive types. For me , "" + bool is shorter, clearer and much easier to remember. I don't understand why I should avoid it. It is one of things that make Java better than C/C++. I didn't remember about existence of valueOf() method, and doubt that I will ever use it. > For me , "" + bool is shorter, clearer and much easier to remember. I > don't understand why I should avoid it. Because that compiles into this: StringBuffer temp = new StringBuffer(); temp.append(bool); s = temp.toString(); Boolean.toString() simply returns a static string, no construction necessary. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 NotDashEscaped: You need GnuPG to verify this message Mishagam schreef: >>> For me standard Java way (for integers and so on): >>> [quoted text clipped - 11 lines] > Java better than C/C++. I didn't remember about existence of valueOf() > method, and doubt that I will ever use it. Except from Alan's comment, I strongly disagree that this is clean and legible code. It is a trick. You have to know details of Java syntax to know it, whereas String.valueOf(boolean) or Boolean.toString(boolean) comply to the standard static method syntax. H. SignatureHendrik Maryns ================== www.lieverleven.be http://aouw.org > > How can I convert a primitive boolean to String? > [quoted text clipped - 7 lines] > > /gordon Out of curiosity, why would you consider that complex? FWIW, it's exactly the code I see in the String.valueOf(boolean) and Boolean.toString methods in Sun's code (1.4.2). = Steve = SignatureSteve W. Jackson Montgomery, Alabama > Out of curiosity, why would you consider that complex? I don't, it was an attempt at sarcasm. The OP has been posting here for something like 5 or 6 years, and I would expect that he should be capable of solving that kind of problem by now. /gordon Signature[ do not email me copies of your followups ] g o r d o n + n e w s @ b a l d e r 1 3 . s e On Wed, 15 Mar 2006 13:57:58 +0100, Petterson Mikael <mikael.petterson@era.ericsson.se> wrote, quoted or indirectly quoted someone who said : >How can I convert a primitive boolean to String? for all your conversion needs, as the conversion amanuensis. See http://mindprod.com/applets/converter.html SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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