How do I delete specific characters from a particular String in Java

Question

For example I m extracting a text String from a text file and I need those words to form an array  However  when I do all that some words end with comma     or a full stop     or even have brackets attached to them  which is all perfectly normal    What I want to do is to get rid of those characters  I ve been trying to do that using those predefined String methods in Java but I just can t get around it

User · Answer

To remove the last character do as Mark Byers said

s = s.substring(0, s.length() - 1);

Additionally, another way to remove the characters you don't want would be to use the .replace(oldCharacter, newCharacter) method.

as in:

s = s.replace(",","");

and

s = s.replace(".","");

User · Answer

Use   String str    whatever   str   str replaceAll                replaceAll takes a regular expression   This             looks for each comma and or period

User · Answer

Note that the word boundaries also depend on the Locale  I think the best way to do it using standard java text BreakIterator  Here is an example from the java sun com tutorial   import java text BreakIterator  import java util Locale   public static void main String   args        String text     n                  n                 For example I m extracting a text String from a text file and I need those words to form an array  However  when I do all that some words end with comma     or a full stop     or even have brackets attached to them  which is all perfectly normal   n                  n                 What I want to do is to get rid of those characters  I ve been trying to do that using those predefined String methods in Java but I just can t get around it  n                  n                 Every help appreciated  Thanx       BreakIterator wordIterator   BreakIterator getWordInstance Locale getDefault         extractWords text  wordIterator      static void extractWords String target  BreakIterator wordIterator        wordIterator setText target       int start   wordIterator first        int end   wordIterator next         while  end    BreakIterator DONE            String word   target substring start  end           if  Character isLetterOrDigit word charAt 0                  System out println word                     start   end          end   wordIterator next              Source  http   java sun com docs books tutorial i18n text word html

User · Answer

You can use replaceAll   method    String replaceAll           String replaceAll             String replaceAll               etc

User · Answer

Reassign the variable to a substring   s   s substring 0  s length   - 1    Also an alternative way of solving your problem  you might also want to consider using a StringTokenizer to read the file and set the delimiters to be the characters you don t want to be part of words

User · Answer

The best method is what Mark Byers explains   s   s substring 0  s length   - 1    For example  if we want to replace   to space     with ReplaceAll  it doesn t work fine  String replaceAll              or   String replaceAll                 if it is a path

User · Answer

You can t modify a String in Java  They are immutable  All you can do is create a new string that is substring of the old string  minus the last character   In some cases a StringBuffer might help you instead

[java] How do I delete specific characters from a particular String in Java?

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