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

License

Parameter

Return

Declaration

public static List<String> split(String str, String delim) 

Method Source Code

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

import java.util.*;

public class Main {
    /**//from ww  w.j  a  v a2  s  .co  m
     * Split the given string <code>str/code> delimited by given delimiter 
     * <code>delim</code> into string list.
     * <p>Examples:
     * <blockquote><pre>
     * StringUtil.split("2005-05-01", "-") return list L[2005,05,01]
     * StringUtil.split("2005 05 01", " ") return list L[2005,05,01]
     * </pre></blockquote>
     * @param str string to split
     * @param delim delimiter set which delimit the token in the string, if it's
     * null then use default value : space characters(" \t\r\n\f")
     * @return string list contains tokens splitted by given delimiter
     */
    public static List<String> split(String str, String delim) {
        List<String> splitList = null;
        StringTokenizer st = null;

        if (str == null) {
            return splitList;
        }

        if (isValid(delim)) {
            st = new StringTokenizer(str, delim);
        } else {
            st = new StringTokenizer(str);
        }

        if ((st != null) && st.hasMoreTokens()) {
            splitList = new ArrayList<String>();

            while (st.hasMoreTokens()) {
                splitList.add(st.nextToken());
            }
        }

        return splitList;
    }

    /**
     * Verify whether the given string <code>str</code> is valid. If the given
     * string is not null and contains any alphabet or digit, then the string
     * is think as valid, otherwise invalid.
     * @param str string to verify
     * @return false if the given string is null or contains only empty character,
     * otherwise return true.
     */
    public static boolean isValid(String str) {
        boolean valid = true;

        if ((str == null) || (str.trim().length() <= 0)) {
            valid = false;
        }

        return valid;
    }
}

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