AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  / and          AppletTalk.com Forum Index -> Java Help View previous topic :: View next topic   Author Message Riri Guest Posted: Tue Jan 27, 2004 5:53 pm    Post subject: / and I have a JOpenFile, when i open a file, for instance D:/Temp/Test.jpg, method toString() gives D:TempTest.jpg. How do i replace the by /? replaceAll("", "/"); is not working Thanks R. Back to top Chris Smith Guest Posted: Tue Jan 27, 2004 6:09 pm    Post subject: Re: / and Riri wrote: Quote: I have a JOpenFile, when i open a file, for instance D:/Temp/Test.jpg, method toString() gives D:TempTest.jpg. How do i replace the by /? replaceAll("", "/"); is not working This is a trap set by Sun for the unwary programmer. The replaceAll method doesn't replace one String with another; it replaces a regular expression with a replacement pattern. That means you have to escape at least some special characters in both parameters. E.g., fileName = fileName.replaceAll("\\", "/"); (The second parameter doesn't need quite as much escaping as the first, but you'll still need to escape backslash characters if they occur.) -- www.designacourse.com The Easiest Way to Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation Back to top Andrew Thompson Guest Posted: Tue Jan 27, 2004 10:53 pm    Post subject: Re: / and "Chris Smith" ... Quote: Riri wrote: .... How do i replace the by /? replaceAll("", "/"); is not working ... fileName = fileName.replaceAll("\\", "/"); Would it not be better to use File.separator as the second parameter, Chris? That way when the (damn!) user goes and wants to use it on the 'other' system it will use the platform default separator. -- Andrew Thompson * http://www.PhySci.org/codes/ Web & IT help * http://www.PhySci.org/ PhySci software suite * http://www.1point1C.org/ 1.1C - Superluminal! * http://www.AThompson.info/andrew/ personal site Back to top Chris Smith Guest Posted: Tue Jan 27, 2004 11:35 pm    Post subject: Re: / and Andrew Thompson wrote: Quote: "Chris Smith" ... | Riri wrote: ... | > How do i replace the by /? | | > replaceAll("", "/"); is not working .. | fileName = fileName.replaceAll("\\", "/"); Would it not be better to use File.separator as the second parameter, Chris? No! Actually, that's a very poor idea, because File.separator is a backslash on some platforms, and replaceAll breaks when a backslash is used as the replacement string. That was explained in my last email. As a result, you'd have to do something like: String sep = File.separator.replaceAll("\\", "\"); fileName = fileName.replaceAll("\\", sep); But, that last bit may be a better idea *if* you're using the name in a context where the platform file separator is used. On the other hand, if you're building a JAR path (or anything else where '/' is used consistently as the separator char), you want to use the literal slash. -- www.designacourse.com The Easiest Way to Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation Back to top Jon A. Cruz Guest Posted: Wed Jan 28, 2004 4:27 am    Post subject: Re: / and Riri wrote: Quote: I have a JOpenFile, when i open a file, for instance D:/Temp/Test.jpg, method toString() gives D:TempTest.jpg. How do i replace the by /? If you have actual files involved, use java.io.File instead of strings. Then use File.getParentFile() new File(File, String) Back to top Boris Stumm Guest Posted: Wed Jan 28, 2004 7:29 am    Post subject: Re: / and Riri wrote: Quote: I have a JOpenFile, when i open a file, for instance D:/Temp/Test.jpg, method toString() gives D:TempTest.jpg. How do i replace the by /? replaceAll("", "/"); is not working Try replace('', '/'). (Or, as mentioned already, replace('', File.separatorChar) Boris Stumm Back to top Riri Guest Posted: Wed Jan 28, 2004 10:23 am    Post subject: Re: / and Thank you but fileName = fileName.replaceAll("\\", "/"); doesn't work either. R "Chris Smith" <cdsmith (AT) twu (DOT) net> a écrit dans le message de news: [email]MPG.1a80573bbd5731cb9898ee (AT) news (DOT) pop4.net[/email]... Quote: Riri wrote: I have a JOpenFile, when i open a file, for instance D:/Temp/Test.jpg, method toString() gives D:TempTest.jpg. How do i replace the by /? replaceAll("", "/"); is not working This is a trap set by Sun for the unwary programmer. The replaceAll method doesn't replace one String with another; it replaces a regular expression with a replacement pattern. That means you have to escape at least some special characters in both parameters. E.g., fileName = fileName.replaceAll("\\", "/"); (The second parameter doesn't need quite as much escaping as the first, but you'll still need to escape backslash characters if they occur.) -- www.designacourse.com The Easiest Way to Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation Back to top Chris Smith Guest Posted: Wed Jan 28, 2004 2:18 pm    Post subject: Re: / and Riri wrote: Quote: Thank you but fileName = fileName.replaceAll("\\", "/"); doesn't work either. Then you need to define "doesn't work". Do you get an error message? Is it compile-time or run-time? If you don't get an error message, then what exactly was fileName equal to when you called that method, and what is it equal to after calling the method? -- www.designacourse.com The Easiest Way to Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation Back to top Riri Guest Posted: Wed Jan 28, 2004 5:57 pm    Post subject: Re: / and I have a jTextFiled that contains "D:TempPicture 023.jpg", i'd like to open the image corresponding to that, but it souldn't be "", but "/", when i try to do s.replaceAll(\\, "/");, i obtain the same thing "D:TempPicture 023.jpg" Thanks Melina Back to top Virgil Green Guest Posted: Wed Jan 28, 2004 6:16 pm    Post subject: Re: / and "Riri" <none (AT) nshotmail (DOT) com> wrote Quote: I have a jTextFiled that contains "D:TempPicture 023.jpg", i'd like to open the image corresponding to that, but it souldn't be "", but "/", when i try to do s.replaceAll(\\, "/");, i obtain the same thing "D:TempPicture 023.jpg" Show us the exact line of code you are using. Note that s.replaceAll() returns a new string with the replacements. It does not change the original String as String objects are immutable. Are you assigning the resulting String (reference) to a variable? - Virgil Back to top Jon A. Cruz Guest Posted: Sat Feb 07, 2004 7:39 am    Post subject: Re: / and Riri wrote: Quote: I have a jTextFiled that contains "D:TempPicture 023.jpg", i'd like to open the image corresponding to that, but it souldn't be "", but "/" Are you sure??? Last time I was checking things, that was the preferred path type on Windows. Then there are problems if you get to UNC paths. Back to top Jon A. Cruz Guest Posted: Sat Feb 07, 2004 7:40 am    Post subject: Re: / and Boris Stumm wrote: Quote: Try replace('', '/'). (Or, as mentioned already, replace('', File.separatorChar) Again, that can break paths on Windows. 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