Java String Split by Char split(String str, char deli)

Description

Description:split a string into String array delimited by character

License

Open Source License

Parameter

Parameter	Description
str	the original string
deli	the delimit character

Return

the String array or a zero length string array

Declaration

public static String[] split(String str, char deli) 

Method Source Code

//package com.java2s;
/*/*  w ww.j  a v  a 2  s.c  o m*/
 * $RCSfile: LogStringUtil,v $$
 * $Revision: 1.0  $
 * $Date: 2010-12-09  $
 *
 * Copyright (C) 2011 GyTech, Inc. All rights reserved.
 *
 * This software is the proprietary information of GyTech, Inc.
 * Use is subject to license terms.
 */

import java.util.ArrayList;

public class Main {
    /**
     * <p>Description:split a string into String array delimited by character</p>
     * @param str the original string
     * @param deli the delimit character
     * @return the String array or a zero length string array
     */
    public static String[] split(String str, char deli) {
        // return no groups if we have an empty string
        if ((str == null) || "".equals(str)) {
            return new String[0];
        }

        ArrayList<String> parts = new ArrayList<String>();
        int currIdx;
        int prevIdx = 0;

        while ((currIdx = str.indexOf(deli, prevIdx)) > 0) {
            String part = str.substring(prevIdx, currIdx).trim();
            parts.add(part);
            prevIdx = currIdx + 1;
        }

        parts.add(str.substring(prevIdx, str.length()).trim());

        String[] result = new String[parts.size()];
        parts.toArray(result);

        return result;
    }

    /**
     * <p>Description:Trim the input string</p>
     * @param input string
     * @return the trimmed string
     */
    public static String trim(String str) {
        return (str == null ? "" : str.trim());
    }

    /**
    * <p>Description:Sub a string with the length, </p>
    * @param srcStr source string
    * @param subLen the length what you want to sub a string
    * @return subLen the length of sub string
    */
    public static String subString(String srcStr, int subLen) {
        byte[] bytes = srcStr.getBytes();
        //add by yujie
        //when logwarn system will remove some character of chinese string
        //on 2005/10/18
        if (bytes.length <= subLen)
            return srcStr;

        char[] chars = srcStr.toCharArray();
        StringBuffer sb = new StringBuffer();

        for (int i = 0, j = 0; i < subLen && i < bytes.length && j < chars.length;) {
            char cbyte = (char) bytes[i];
            //normal English character
            if (cbyte == chars[j]) {
                sb.append(chars[j]);
                i++;
                j++;
            } else {//Chinese character
                    //if adding next Chinese character will be over limitted, 
                    //then will not add this character
                if (i + 1 < subLen) {
                    sb.append(chars[j]);
                    //one chinese character will be equal two bytes
                    i++;
                    i++;
                    j++;
                } else
                    break;
            }
        }

        return sb.toString();
    }
}

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