Java String Split by Delimiter splitToList(final String string, final String delim, final int limit)

Description

split To List

License

Apache License

Declaration

public static List<String> splitToList(final String string, final String delim, final int limit) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.ArrayList;

import java.util.List;

public class Main {
    /** An empty string constant */
    public static final String EMPTY = "";

    public static List<String> splitToList(final String string, final String delim, final int limit) {
        // get the count of delim in string, if count is > limit
        // then use limit for count. The number of delimiters is less by one
        // than the number of elements, so add one to count.
        int count = count(string, delim) + 1;
        if (limit > 0 && count > limit) {
            count = limit;/*  w  w  w  .  j  a  v a  2s. c  om*/
        }

        final List<String> strings = new ArrayList<String>(count);
        int begin = 0;

        for (int i = 0; i < count; i++) {
            // get the next index of delim
            int end = string.indexOf(delim, begin);

            // if the end index is -1 or if this is the last element
            // then use the string's length for the end index
            if (end == -1 || i + 1 == count) {
                end = string.length();
            }

            // if end is 0, then the first element is empty
            if (end == 0) {
                strings.add(EMPTY);
            } else {
                strings.add(string.substring(begin, end));
            }
            // update the begining index
            begin = end + 1;
        }
        return strings;
    }

    public static List<String> splitToList(final String string, final String delim) {
        return splitToList(string, delim, -1);
    }

    /**
     * Count the number of instances of substring within a string.
     * 
     * @param string
     *          String to look for substring in.
     * @param substring
     *          Sub-string to look for.
     * @return Count of substrings in string.
     */
    public static int count(final String string, final String substring) {
        int count = 0;
        int idx = 0;

        while ((idx = string.indexOf(substring, idx)) != -1) {
            idx++;
            count++;
        }

        return count;
    }

    /**
     * Count the number of instances of character within a string.
     * 
     * @param string
     *          String to look for substring in.
     * @param c
     *          Character to look for.
     * @return Count of substrings in string.
     */
    public static int count(final String string, final char c) {
        return count(string, String.valueOf(c));
    }
}

Related

1. splitStringList(String strList, String delimit)
2. splitStringUsingDelimiter(String name, String delimiter)
3. splitText(String text, String delimiter)
4. splitToArray(String stringToSplit, String delimitter, boolean trim)
5. splitToken(String str, String delimiter)
6. splitToList(String a_text, String a_delimiter)
7. splitToList(String s, String delimRegEx)
8. splitToList(String str, char delimiter)
9. splitUpTo(String s, String delimiter, int cnt)