How can I remove a substring from a given String

Question

Is there an easy way to remove substring from a given String in Java    Example   Hello World    removing  o     Hell Wrld

User · Answer

If you know the start and end index you may use this  string   string substring 0  start index    string substring end index  string length

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You can use StringBuffer   StringBuffer text   new StringBuffer  Hello World    text replace  StartIndex  EndIndex  String

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You should have to look at StringBuilder StringBuffer which allow you to delete  insert  replace char s  at specified offset

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You can also use guava s CharMatcher removeFrom function   Example    String s   CharMatcher is  a   removeFrom  bazaar

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private static void replaceChar         String str    hello world       final String   res   Arrays stream str split                   filter s - gt   s equalsIgnoreCase  o                 toArray String    new       System out println String join     res        In case you have some complicated logic to filter the char  just another way instead of replace

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Check out Apache StringUtils         static String  replace String text  String searchString  String replacement  Replaces all occurrences of a String within another   String    static String  replace String text  String searchString  String replacement  int max  Replaces a String with another String inside a   larger String  for the first max values of the search String    static String  replaceChars String str  char searchChar  char replaceChar  Replaces all occurrences of a character in a String with   another    static String  replaceChars String str  String searchChars  String replaceChars  Replaces multiple characters in a String in one go    static String  replaceEach String text  String   searchList  String   replacementList  Replaces all occurrences of Strings within   another String    static String  replaceEachRepeatedly String text  String   searchList  String   replacementList  Replaces all occurrences of   Strings within another String    static String  replaceOnce String text  String searchString  String replacement  Replaces a String with another String inside a   larger String  once    static String  replacePattern String source  String regex  String replacement  Replaces each substring of the source String that   matches the given regular expression with the given replacement using   the Pattern DOTALL option

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Here is the implementation to delete all the substrings from the given string  public static String deleteAll String str  String pattern        for int index   isSubstring str  pattern   index    -1  index   isSubstring str  pattern           str   deleteSubstring str  pattern  index        return str     public static String deleteSubstring String str  String pattern  int index        int start index   index      int end index   start index   pattern length   - 1      int dest index   0      char   result   new char str length           for int i   0  i lt  str length   - 1  i            if i  lt  start index    i  gt  end index              result dest index      str charAt i        return new String result  0  dest index   1       The implementation of isSubstring   method is here

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You can use Substring also for replacing with existing string   var str    abc awwwa   var Index   str indexOf  awwwa    str   str substring 0  Index

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You could easily use String replace     String helloWorld    Hello World    String hellWrld   helloWorld replace  o

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replaceAll String regex  String replacement    Above method will help to get the answer   String check    Hello World   check   check replaceAll  o

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This works good for me   String hi    Hello World   String no o   hi replaceAll  o          or you can use   String no o   hi replace  o

User · Answer

replace  regex    replacement    replaceAll  regex    replacement      In your example   String hi    Hello World   String no o   hi replaceAll  o

[java] How can I remove a substring from a given String?

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