Java String Split by Delimiter split(String str, int delim, String trailing)

Description

Splits a string into substrings.

License

LGPL

Parameter

Parameter	Description
str	The string which is to split.
delim	The delimiter character, for example a space <code>' '</code>.
trailing	The ending which is added as a substring though it wasn't in the <code>str</code>. This parameter is just for the <code>IRCParser</code> class which uses this method to split the <code>middle</code> part into the parameters. But as last parameter always the <code>trailing</code> is added. This is done here because it's the fastest way to do it here. If the <code>end</code> is <code>null</code> or <code>""</code>, nothing is appended.

Return

An array with all substrings.

Declaration

public static String[] split(String str, int delim, String trailing) 

Method Source Code

//package com.java2s;
/**/*w  w  w.jav a2  s.c o  m*/
 * IRClib - A Java Internet Relay Chat library
 * Copyright (C) 2006-2015 Christoph Schwering <schwering@gmail.com>
 * and/or other contributors as indicated by the @author tags.
 *
 * This library and the accompanying materials are made available under the
 * terms of the
 *  - GNU Lesser General Public License,
 *  - Apache License, Version 2.0 and
 *  - Eclipse Public License v1.0.
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY.
 */

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class Main {
    /**
     * Splits a string into substrings.
     * @param str The string which is to split.
     * @param delim The delimiter character, for example a space <code>' '</code>.
     * @param trailing The ending which is added as a substring though it wasn't
     *                 in the <code>str</code>. This parameter is just for the
     *                 <code>IRCParser</code> class which uses this method to
     *                 split the <code>middle</code> part into the parameters.
     *                 But as last parameter always the <code>trailing</code> is
     *                 added. This is done here because it's the fastest way to
     *                 do it here.
     *                 If the <code>end</code> is <code>null</code> or
     *                 <code>""</code>, nothing is appended.
     * @return An array with all substrings.
     * @see #split(String, int)
     */
    public static String[] split(String str, int delim, String trailing) {
        List<String> items = new ArrayList<String>(15);
        int last = 0;
        int index = 0;
        int len = str.length();
        while (index < len) {
            if (str.charAt(index) == delim) {
                items.add(str.substring(last, index));
                last = index + 1;
            }
            index++;
        }
        if (last != len)
            items.add(str.substring(last));
        if (trailing != null && trailing.length() != 0)
            items.add(trailing);
        String[] result = items.toArray(new String[0]);
        return result;
    }

    /**
     * Splits a string into substrings. This method is totally equal to
     * <code>split(str, delim, null)</code>.
     * @param str The string which is to split.
     * @param delim The delimiter character, for example a space <code>' '</code>.
     * @return An array with all substrings.
     * @see #split(String, int, String)
     */
    public static String[] split(String str, int delim) {
        return split(str, delim, null);
    }

    public static int[] toArray(Collection<Integer> list) {
        if (list == null || list.isEmpty()) {
            return new int[0];
        }
        int[] result = new int[list.size()];
        int i = 0;
        for (int value : list) {
            result[i++] = value;
        }
        return result;
    }
}

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