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

Description

Splits a string containing n occurrences of delim into n+1 strings that don't contain delim (and whose occurrences in str are bounded by delim).

License

Open Source License

Parameter

Parameter	Description
str	a <code>String</code> value
delim	a <code>char</code> value

Return

a String[] value

Declaration

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

Method Source Code

//package com.java2s;
/* J_LZ_COPYRIGHT_BEGIN *******************************************************
* Copyright 2001-2006, 2011 Laszlo Systems, Inc.  All Rights Reserved.        *
* Use is subject to license terms.                                            *
* J_LZ_COPYRIGHT_END *********************************************************/

import java.util.*;

public class Main {
    /**/*from w w  w  .j  ava  2 s.co  m*/
     * Splits a string containing <var>n</var> occurrences of
     * <var>delim</var> into <var>n+1</var> strings that don't contain
     * <var>delim</var> (and whose occurrences in <var>str</var> are
     * bounded by <var>delim</var>).
     *
     * <p>For example, <code>split("a,b,,c", ",")<code> evaluates to
     * <code>{"a", "b", "", "c"}</code>.
        
     * <p><code>split("/", "/") -> ["", ""]</code>
     *
     * @param str a <code>String</code> value
     * @param delim a <code>char</code> value
     * @return a <code>String[]</code> value
     */
    public static String[] split(String str, String delim) {
        List<String> lines = new ArrayList<String>();
        int startPos = 0;
        while (true) {
            int endPos = indexOf(str, delim, startPos);
            if (endPos == -1) {
                if (startPos > 0 || startPos < str.length()) {
                    lines.add(str.substring(startPos));
                }
                break;
            }
            lines.add(str.substring(startPos, endPos));
            startPos = endPos + delim.length();
        }
        {
            String[] result = new String[lines.size()];
            int i = 0;
            for (String line : lines) {
                result[i] = line;
                i++;
            }
            return result;
        }
    }

    /** Return the index of the first occurrence of value in str that
     * is later than or equal to offset.
     * @param str a String
     * @param value a String
     * @param offset a String
     * @return an int
     */
    public static int indexOf(String str, String value, int offset) {
        if (value.length() == 0) {
            throw new IllegalArgumentException();
        }
        while (offset < str.length()) {
            int pos = str.indexOf(value.charAt(0), offset);
            if (pos == -1) {
                return pos;
            }
            for (int i = 1;; i++) {
                if (i >= value.length()) {
                    return pos;
                }
                if (pos + i >= str.length() || str.charAt(pos + i) != value.charAt(i)) {
                    break;
                }
            }
            offset = pos + 1;
        }
        return -1;
    }
}

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2. split(String str, String delim)
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