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Java Forum / General / November 2006Split a string into characters
I'm trying to do an unbelievably simple thing but it's not working. I want to split a string into its constituent characters. I want to split the string 83AV into 8,3,A,V. I use the following code: <code> String str = "83AV"; String[] strToks = str.split(""); for (String tok : strToks) System.out.println(tok); </code> This gives me an extra "null" String in addition to the actual tokens. Any idea how we can do this in a simple way? What regular expression should I use for the split function? Thanks! > I'm trying to do an unbelievably simple thing but it's not working. > [quoted text clipped - 13 lines] > Any idea how we can do this in a simple way? What regular expression > should I use for the split function? str.toCharArray() will return a char[] and you can then either use each char directly or use Character.toString on it. Arne > I'm trying to do an unbelievably simple thing but it's not working. > [quoted text clipped - 13 lines] > Any idea how we can do this in a simple way? What regular expression > should I use for the split function? You're trying a bit too hard. If you just need, as you say, the constituent characters, just use String.toCharArray(); That returns char[]; if you want String[] instead, you can step through the array applying the String(char[], int offset, int value) constructor.  SignatureMark Jeffcoat Austin, TX > I'm trying to do an unbelievably simple thing but it's not working. > [quoted text clipped - 13 lines] > Any idea how we can do this in a simple way? What regular expression > should I use for the split function? str.split("(?<=\\w)"); This construct is called negative look-behind. > str.split("(?<=\\w)"); >This construct is called negative look-behind. ~~~~~~maybe positive look-behind ref from java 5 api doc : " Special constructs (non-capturing) (?:X) X, as a non-capturing group (?idmsux-idmsux) Nothing, but turns match flags on - off (?idmsux-idmsux:X) X, as a non-capturing group with the given flags on - off (?=X) X, via zero-width positive lookahead (?!X) X, via zero-width negative lookahead (?<=X) X, via zero-width positive lookbehind (?<!X) X, via zero-width negative lookbehind (?>X) X, as an independent, non-capturing group " Although I don't know what each item means. On 11月18日, 下午12时06分, Jeffrey Schwab <j...@schwabcenter.com> wrote: > zak...@gmail.com wrote: > > I'm trying to do an unbelievably simple thing but it's not working. [quoted text clipped - 16 lines] > > This construct is called negative look-behind.- 隐藏被引用文字 -- 显示引用的文字 - > I'm trying to do an unbelievably simple thing but it's not working. > [quoted text clipped - 13 lines] > Any idea how we can do this in a simple way? What regular expression > should I use for the split function? str.split("(?<=\\w)"); This construct is called negative look-behind. > I'm trying to do an unbelievably simple thing but it's not working. > [quoted text clipped - 15 lines] > > Thanks! char[] chArr = yourString.toCharArray(); Signaturetrippy mhm31x9 Smeeter#29 WSD#30 sTaRShInE_mOOnBeAm aT HoTmAil dOt CoM NP: "All I Really Want" -- Alanis Morissette "Now, technology's getting better all the time and that's fine, but most of the time all you need is a stick of gum, a pocketknife, and a smile." -- Robert Redford "Spy Game" 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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