Java

String.split("\\"); throws PatternSyntaxException?

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Join Date: May 2008

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TheWhite

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String.split("\\"); throws PatternSyntaxException?

Aug 20th, 2009

 Help with Code Tags 
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	String line = "Extracting from E:\\Junk\\morejunk\\file.txt";
	System.out.println(line);	//prints:    Extracting from E:\Junk\morejunk\file.txt
 
	String[] splitPath = line.split("\\");	//exception thrown here
	String folder = splitPath[splitPath.length-2];
 
	System.out.println(folder);
	String line = "Extracting from E:\\Junk\\morejunk\\file.txt";
	System.out.println(line);	//prints:    Extracting from E:\Junk\morejunk\file.txt
		
	String[] splitPath = line.split("\\");	//exception thrown here
	String folder = splitPath[splitPath.length-2];
		
	System.out.println(folder);

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Exception in thread "AWT-EventQueue-0" java.util.regex.PatternSyntaxException: Unexpected internal error near index 1

My objective is to always print the folder containing the file being extracted (morejunk in this case).

Any suggestions why it wont accept "\\" as a pattern which is correctly syntaxed?

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quuba

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Re: String.split("\\"); throws PatternSyntaxException?

Aug 20th, 2009

String[] splitPath = line.split("\\\\");

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TheWhite

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Re: String.split("\\"); throws PatternSyntaxException?

Aug 20th, 2009

hmm... well thats funny..

You are correct.. Here I specified the cmd with 2 \'s, but ur way also works when line is given as a paramater, using only 1 \'s.

I guess java automatically throws in another \ on its own every time it sees only 1 \ so \\\\ works.

Thank you.