SplitAroundRegex.java

package com.github.rafael09ed.nMMModProfileExporter;

import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author Rafael
 * @version 1.0 2/17/2017
 */
public class SplitAroundRegex {
    private static List<String> splitAroundRegex(String toSplit, String regex) {
        List<String> list = new LinkedList<>();
        String[] parts = toSplit.split(regex);
        Matcher matcher = Pattern.compile(regex).matcher(toSplit);
        int i = 0, l = 0;
        while (matcher.find()) {
            l += parts[i].length() + matcher.group().length();
            list.add(parts[i++]);
            list.add(matcher.group());
        }
        if (toSplit.length() != l)
            list.add(parts[i]);
        return list;
    }

    private static String[] splitAroundRegex2(String toSplit, String regex) {
        String[] parts = toSplit.split(regex);
        String[] list = new String[parts.length * 2];
        Matcher matcher = Pattern.compile(regex).matcher(toSplit);
        int i = -1;
        while (++i * 2 < list.length) {
            list[i * 2] = parts[i];
            if (matcher.find())
                list[i * 2 + 1] = matcher.group(0);
        }
        return list;
    }
}