Java String Split by Char split(final String input, final char split)

Description

Similar to the normal String split function.

License

Open Source License

Parameter

Parameter	Description
input	The string to be split
split	The char to be used to split the input string

Return

An array of split strings

Declaration

public static String[] split(final String input, final char split) 

Method Source Code

//package com.java2s;

import java.util.ArrayList;

public class Main {
    /**/*from  w w w  .j a va 2  s  . c  o  m*/
     * Similar to the normal String split function. However this function ignores escaped characters (i.e. \[ ).
     *
     * @param input The string to be split
     * @param split The char to be used to split the input string
     * @return An array of split strings
     */
    public static String[] split(final String input, final char split) {
        int index = indexOf(input, split);
        int prevIndex = 0;
        final ArrayList<String> output = new ArrayList<String>();
        if (index == -1) {
            output.add(input);
            return output.toArray(new String[1]);
        }
        while (index != -1) {
            output.add(input.substring(prevIndex, index));
            prevIndex = index + 1;
            index = indexOf(input, split, index + 1);
        }
        output.add(input.substring(prevIndex, input.length()));
        return output.toArray(new String[output.size()]);
    }

    /**
     * Similar to the normal String split function. However this function ignores escaped characters (i.e. \[ ).
     *
     * @param input The string to be split
     * @param split The char to be used to split the input string
     * @param limit The maximum number of times to split the string
     * @return An array of split strings
     */
    public static String[] split(final String input, final char split, final int limit) {
        int index = indexOf(input, split);
        int prevIndex = 0, count = 1;
        final ArrayList<String> output = new ArrayList<String>();
        if (index == -1) {
            output.add(input);
            return output.toArray(new String[1]);
        }
        while (index != -1 && count != limit) {
            output.add(input.substring(prevIndex, index));
            prevIndex = index + 1;
            index = indexOf(input, split, index + 1);
            count++;
        }
        output.add(input.substring(prevIndex, input.length()));
        return output.toArray(new String[output.size()]);
    }

    /**
     * Gets the first index of a character ignoring characters that have been escaped
     *
     * @param input The string to be searched
     * @param delim The character to be found
     * @return The index of the found character or -1 if the character wasn't found
     */
    public static int indexOf(final String input, final char delim) {
        return indexOf(input, delim, 0);
    }

    /**
     * Gets the first index of a character after fromIndex. Ignoring characters that have been escaped
     *
     * @param input     The string to be searched
     * @param delim     The character to be found
     * @param fromIndex Start searching from this index
     * @return The index of the found character or -1 if the character wasn't found
     */
    public static int indexOf(final String input, final char delim, final int fromIndex) {
        if (input == null)
            return -1;
        int index = input.indexOf(delim, fromIndex);
        if (index != 0) {
            while (index != -1 && index != (input.length() - 1)) {
                if (input.charAt(index - 1) != '\\')
                    break;
                index = input.indexOf(delim, index + 1);
            }
        }
        return index;
    }
}

Related

1. fastSplitTrimmed(final String string, final char sep)
2. safeSplit(String string, char divider)
3. split(char c, String s)
4. split(char elem, String orig)
5. split(char sep, String input)
6. split(final String string, final char... toSplit)
7. split(String cs, char sep)
8. split(String s, char c)
9. split(String s, char c)