Java String Split by Char splitByNonNestedChars(String s, char... c)

Description

Splits string s by any chars c for every occurrence of chars c that are not nested in parentheses.

License

Open Source License

Parameter

Parameter	Description
s	The string to split.
c	The chars by which to split s.

Return

A string array of s split by occurrences of chars c not nested in parentheses.

Declaration

public static String[] splitByNonNestedChars(String s, char... c) 

Method Source Code

//package com.java2s;
/*//from ww  w  .ja  v  a2s  .  co m
 Solve4x - An algebra solver that shows its work
 Copyright (C) 2015  Nathaniel Paulus
    
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.
    
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
  */

import java.util.ArrayList;

public class Main {
    /**
      * Splits string s by any chars c for every occurrence of chars c that are not nested in parentheses.
      * The characters at which s is split will be included at the beginning of the respective elements.
      * Occurrences of chars c at the beginning of s will be ignored.
      * Examples:
      * splitByNonNestedChars("xy+6-4", '+', '-') returns ["xy", "+6", "-4"]
      * splitByNonNestedChars("(4x)/(6y(2+x))", '/') returns ["(4x)", "/(6y(2+x))"]
      * @param s The string to split.
      * @param c The chars by which to split s.
      * @return A string array of s split by occurrences of chars c not nested in parentheses.
      */
    public static String[] splitByNonNestedChars(String s, char... c) {
        //get setup
        int parDepth = 0;
        String chars = new String(c);
        ArrayList<String> parts = new ArrayList<String>();
        //search for matches
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) == '(')
                parDepth++;
            else if (s.charAt(i) == ')')
                parDepth--;
            //if it's a char we split at, and it's not the first one
            else if (parDepth == 0 && i != 0 && chars.indexOf(s.charAt(i)) != -1) {
                parts.add(s.substring(0, i));
                s = s.substring(i);
                i = 0;
            }
        }
        parts.add(s); // add the rest of the string
        return parts.toArray(new String[parts.size()]);
    }
}

Related

1. split(String val, char ch)
2. split(String value, char splitChar)
3. splitAt(String inputString, Character inputChar)
4. splitAt(String str, char c)
5. splitByChar(final String message, final char ch)
6. splitChars(String input, String charsToBeRemoved)
7. splitEncolosed(String s, char open_tag, char close_tag)
8. splitFast3(String data, char splitChar)
9. splitInclusive(CharSequence input, char[] splitChars)