jodd-core/src/main/java/jodd/util/CommandLine.java
public CommandLine env(final String key, final String value) {
		if (env == null) {
			env = new HashMap<>();
		}
		env.put(key, value);
		return this;
	}
public CommandLine env(final String key, final String value) {
		if (env == null) {
			env = new HashMap<>();
		}
		env.put(key, value);
		return this;
	}
Sets environment variable.