Java String remove all non numeric characters

Question

Trying to remove all letters and characters that are not 0-9 and a period   I m using Character isDigit   but it also removes decimal  how can I also keep the decimal

User · Answer

With guava   String input    abx123 5   String result   CharMatcher inRange  0    9   or CharMatcher is       retainFrom input     see http   code google com p guava-libraries wiki StringsExplained

User · Answer

I would use a regex   String text    -jaskdh2367sd 27askjdfh23   String digits   text replaceAll    0-9          System out println digits     prints  2367 2723   You might like to keep - as well for negative numbers

User · Answer

This handles null inputs  negative numbers and decimals  you need to include the Apache Commons Lang library  version 3 8 or higher  in your project    import org apache commons lang3 RegExUtils  result   RegExUtils removeAll input   -     d        Library reference  https   commons apache org proper commons-lang apidocs org apache commons lang3 RegExUtils html

User · Answer

Currency decimal separator can be different from Locale to another  It could be dangerous to consider   as separator always  i e   ------------------------------------        Locale              Sample            ---------------- -------------------      USA                1 222 333 44 USD       United Kingdom      1 222 333 44 GBP       European             1 333 333 44 EUR     ------------------------------------   I think the proper way is   Get decimal character via DecimalFormatSymbols by default Locale or specified one  Cook regex pattern with decimal character in order to obtain digits only  And here how I am solving it  code  import java text DecimalFormatSymbols  import java util Locale       public static String getDigit String quote  Locale locale        char decimalSeparator      if  locale    null            decimalSeparator   new DecimalFormatSymbols   getDecimalSeparator          else           decimalSeparator   new DecimalFormatSymbols locale  getDecimalSeparator               String regex    quot   0-9 quot    decimalSeparator    quot   quot       String valueOnlyDigit   quote replaceAll regex   quot  quot        try           return valueOnlyDigit        catch  ArithmeticException   NumberFormatException e            Log e TAG   quot Error in getMoneyAsDecimal quot   e           return null            return null     I hope that may help

User · Answer

Simple way without using Regex   Adding an extra character check for dot     will solve the requirement   public static String getOnlyNumerics String str        if  str    null            return null            StringBuffer strBuff   new StringBuffer        char c      for  int i   0  i  lt  str length     i              c   str charAt i           if  Character isDigit c     c                       strBuff append c                       return strBuff toString

User · Answer

String phoneNumberstr    Tel  00971-557890-999   String numberRefined   phoneNumberstr replaceAll      d-           result  0097-557890-999  if you also do not need  -  in String you can do like this   String phoneNumberstr    Tel  00971-55 7890 999         String numberRefined   phoneNumberstr replaceAll    0-9           result  0097557890999

User · Answer

Try this code   String str    a12 334tyz 78x   str   str replaceAll      d            Now str will contain  12 334 78

User · Answer

str   str replaceAll    D

User · Answer

For the Android folks coming here for Kotlin  val dirtyString     Account Balance   -12 345 67  val cleanString   dirtyString replace      d    toRegex          Output   cleanString    12345 67      This could then be safely converted toDouble    toFloat   or toInt   if needed

User · Answer

A way to replace it with a java 8 stream   public static void main String   args  throws IOException       String test    ab19198zxncvl1308j10923        StringBuilder result   new StringBuilder         test chars   mapToObj  i- gt   char i   filter  c - gt  Character isDigit c     c          forEach  c - gt  result append c          System out println  result      returns 19198 130810923

[java] Java String remove all non numeric characters

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