Java String Split by Separator split(String str, char separatorChar, boolean preserveAllTokens)

Description

split

License

Apache License

Declaration

public static String[] split(String str, char separatorChar, boolean preserveAllTokens) 

Method Source Code

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

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

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

    public static String[] split(String str, char separatorChar, boolean preserveAllTokens) {
        // Performance tuned for 2.0 (JDK1.4)

        if (str == null) {
            return null;
        }// w  w  w.ja v a2s .  c o m
        int len = str.length();
        if (len == 0) {
            return EMPTY_STRING_ARRAY;
        }
        List<String> list = new ArrayList<String>();
        int i = 0, start = 0;
        boolean match = false;
        boolean lastMatch = false;
        while (i < len) {
            if (str.charAt(i) == separatorChar) {
                if (match || preserveAllTokens) {
                    list.add(str.substring(start, i));
                    match = false;
                    lastMatch = true;
                }
                start = ++i;
                continue;
            }
            lastMatch = false;
            match = true;
            i++;
        }
        if (match || (preserveAllTokens && lastMatch)) {
            list.add(str.substring(start, i));
        }
        return (String[]) list.toArray(new String[list.size()]);
    }
}

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