Java String Split by Separator split(String str, String separator)

Description

split

License

Apache License

Declaration

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

Method Source Code

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

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

public class Main {
    private static final String[] EMPTY_STRING_ARRAY = new String[0];

    public static String[] split(String str, String separator) {
        if (str == null) {
            return null;
        }//from www .j  ava  2s.c o  m
        if (separator == null || separator.length() != 1) {
            return null;
        }
        int len = str.length();
        if (len == 0) {
            return EMPTY_STRING_ARRAY;
        }
        List<String> list = new ArrayList<String>();
        int sizePlus1 = 1;
        int i = 0, start = 0;
        boolean match = false;
        // Optimise 1 character case
        char sep = separator.charAt(0);
        while (i < len) {
            if (str.charAt(i) == sep) {
                if (match) {
                    if (sizePlus1++ == 0) {
                        i = len;
                    }
                    list.add(str.substring(start, i));
                    match = false;
                }
                start = ++i;
                continue;
            }
            match = true;
            i++;
        }
        if (match) {
            list.add(str.substring(start, i));
        }
        return list.toArray(new String[list.size()]);
    }
}

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7. split(String str, String separator, boolean preserveEmptyToken)
8. split(String string, char separator)
9. split(String strToSplit, String strSeparator, int iLimit)