The split method in Java does not work on a dot

Question

I have prepared a simple code snippet in order to separate the erroneous portion from my web application   public class Main        public static void main String   args  throws IOException           System out print   nEnter a string - gt             BufferedReader br   new BufferedReader new InputStreamReader System in            String temp   br readLine             String words     temp split                for  int i   0  i  lt  words length  i                  System out println words i      n                        I have tested it while building a web application JSF  I just want to know why in the above code temp split      does not work  The statement   System out println words i    n       displays nothing on the console means that it doesn t go through the loop  When I change the argument of the temp split   method to other characters  It works just fine as usual  What might be the problem

User · Answer

It works fine   Did you read the documentation   The string is converted to a regular expression     is the special character matching all input characters   As with any regular expression special character  you escape with a     You need an additional   for the Java string escape

User · Answer

The documentation on split   says      Splits this string around matches of the given regular expression     Emphasis mine    A dot is a special character in regular expression syntax  Use Pattern quote   on the parameter to split   if you want the split to be on a literal string pattern   String   words   temp split Pattern quote

User · Answer

is the simple answer  Here is simple code for your help   while  line    null                            String   words   line split             wr           mean           if  words length  gt  2            wr   words 0    words 1           mean   words 2          else           wr   words 0           mean   words 1

User · Answer

The method takes a regular expression  not a string  and the dot has a special meaning in regular expressions  Escape it like so split         You need a double backslash  the second one escapes the first

User · Answer

Try   String words   temp split           The method is   String   split String regex         is a reserved char in regex

User · Answer

private String temp    mahesh hiren darshan        String s temp     temp split            Log e  1      s temp 0

User · Answer

java lang String split splits on regular expressions  and   in a regular expression means  any character    Try temp split

[java] The split() method in Java does not work on a dot (.)

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