How can I trim beginning and ending double quotes from a string

Question

I would like to trim a beginning and ending double quote     from a string  How can I achieve that in Java  Thanks

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This is the best way I found  to strip double quotes from the beginning and end of a string   someString replace             g

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private static String removeQuotesFromStartAndEndOfString String inputStr        String result   inputStr      int firstQuote   inputStr indexOf            int lastQuote   result lastIndexOf            int strLength   inputStr length        if  firstQuote    0  amp  amp  lastQuote    strLength - 1            result   result substring 1  strLength - 1             return result

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To remove the first character and last character from the string  use   myString   myString substring 1  myString length  -1

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find indexes of each double quotes and insert an empty string there

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Groovy You can subtract a substring from a string using a regular expression in groovy  String unquotedString   theString -     quot   -    quot

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Using Guava you can write more elegantly CharMatcher is       trimFrom mystring

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Also with Apache StringUtils strip      StringUtils strip null                null  StringUtils strip                         StringUtils strip  abc   null          abc   StringUtils strip    abc   null        abc   StringUtils strip  abc     null        abc   StringUtils strip   abc    null        abc   StringUtils strip    abcyx    xyz        abc    So   final String SchrodingersQuotedString    may or may not be quoted   StringUtils strip SchrodingersQuotedString           quoted no more   This method works both with quoted and unquoted strings as shown in my example  The only downside is  it will not look for strictly matched quotes  only leading and trailing quote characters  ie  no distinction between  partially and  fully  quoted strings

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Matcher m   Pattern compile               matcher value   String strUnquoted   value  if  m find          strUnquoted   m group 1

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You can use String replaceAll   with a pattern of         for this   E g   string   string replaceAll                   To learn more about regular expressions  have al ook at http   regular-expression info   That said  this smells a bit like that you re trying to invent a CSV parser  If so  I d suggest to look around for existing libraries  such as OpenCSV

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Scala  s stripPrefix       stripSuffix         This works regardless of whether the string has or does not have quotes at the start and   or end   Edit  Sorry  Scala only

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I am using something as simple as this   if str startsWith  quot   quot  quot    amp  amp  str endsWith  quot   quot  quot                          str   str substring 1  str length  -1

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Kotlin  In Kotlin you can use String removeSurrounding delimiter  CharSequence   E g   string removeSurrounding            Removes the given delimiter string from both the start and the end of this string if and only if it starts with and ends with the delimiter    Otherwise returns this string unchanged    The source code looks like this   public fun String removeSurrounding delimiter  CharSequence   String   removeSurrounding delimiter  delimiter   public fun String removeSurrounding prefix  CharSequence  suffix  CharSequence   String       if   length  gt   prefix length   suffix length   amp  amp  startsWith prefix   amp  amp  endsWith suffix             return substring prefix length  length - suffix length            return this

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If the double quotes only exist at the beginning and the end  a simple code as this would work perfectly   string   string replace

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public String removeDoubleQuotes String request        return request replace  quot   quot  quot    quot  quot

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First  we check to see if the String is doubled quoted  and if so  remove them  You can skip the conditional if in fact you know it s double quoted   if  string length    gt   2  amp  amp  string charAt 0          amp  amp  string charAt string length   - 1                string   string substring 1  string length   - 1

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To remove one or more double quotes from the start and end of a string in Java  you need to use a regex based solution   String result   input str replaceAll                     If you need to also remove single quotes   String result   input str replaceAll                           NOTE  If your string contains   inside  this approach might lead to issues  e g   Name    John     Name    John    See a Java demo here   String input str       some string      String result   input str replaceAll                         System out println result        gt  some string

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Edited  Just realized that I should specify that this works only if both of them exists  Otherwise the string is not considered quoted  Such scenario appeared for me when working with CSV files   org apache commons lang3 StringUtils unwrap    abc                 abc  org apache commons lang3 StringUtils unwrap    abc                 abc  org apache commons lang3 StringUtils unwrap  abc                 abc

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The pattern below  when used with java util regex Matcher  will match any string between double quotes without affecting occurrences of double quotes inside the string            p Print

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Modifying  brcolow s answer a bit  if  string    null  amp  amp  string length    gt   2  amp  amp  string startsWith        amp  amp  string endsWith             string   string substring 1  string length   - 1

[java] How can I trim beginning and ending double quotes from a string?

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