Convert a String array into a java.util.Map

pom.xml

<dependencies>
	<dependency>
		<groupId>org.apache.commons</groupId>
		<artifactId>commons-lang3</artifactId>
		<version>3.20.0</version>
	</dependency>
</dependencies>

StringArrayToMap.java

import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.StringUtils;

public class StringArrayToMap {

	public static void main(String[] args) {
		//
		final Iterable<String> iterable = Arrays.asList(null, "", " ", "=", "= ", " =", "==", "== ", " ==", "k=v");
		//
		if (iterable != null) {
			//
			iterable.forEach(x -> {
				//
				System.out.println(x + "->" + toMap(x));
				//
			});
			//
		} // if
			//
	}

	private static Map<String, String> toMap(final String... ss) {
		//
		String s = null;
		//
		Map<String, String> map = null;
		//
		for (int i = 0; i < length(ss); i++) {
			//
			if (Objects.equals(s = ArrayUtils.get(ss, i), "=")) {
				//
				put(map = ObjectUtils.getIfNull(map, LinkedHashMap::new), "", "");
				//
			} else if (s != null && s.length() == 2 && s.charAt(0) == '=') {
				//
				put(map = ObjectUtils.getIfNull(map, LinkedHashMap::new), "", s.substring(1, s.length()));
				//
			} else if (s != null && s.length() == 2 && s.charAt(s.length() - 1) == '=') {
				//
				put(map = ObjectUtils.getIfNull(map, LinkedHashMap::new), s.substring(0, s.length() - 1), "");
				//
			} else if (s != null && s.indexOf('=') >= 0 && s.indexOf('=') == s.lastIndexOf('=')) {
				//
				put(map = ObjectUtils.getIfNull(map, LinkedHashMap::new), StringUtils.substringBefore(s, '='),
						StringUtils.substringAfter(s, '='));
				//
			} else if (s != null && s.length() > 2 && s.indexOf('=') != s.lastIndexOf('=')) {
				//
				put(map = ObjectUtils.getIfNull(map, LinkedHashMap::new), StringUtils.substring(s, 0, s.indexOf('=')),
						StringUtils.substring(s, s.indexOf('=') + 1));
				//
			} // if
				//
		} // for
			//
		return map;
		//
	}

	private static <K, V> void put(final Map<K, V> instance, final K key, final V value) {
		if (instance != null) {
			instance.put(key, value);
		}
	}

	private static int length(final Object[] instance) {
		return instance != null ? instance.length : 0;
	}

}

Sample

null->null
->null
->null
=->{=}
= ->{= }
=->{ =}
==->{==}
== ->{== }
==->{ ==}
k=v->{k=v}