Java: The Create Java Object and Invoke Java Method activities can't take empty arrays or variables initialized with "null" as arguments.

[andraciorici]

Environment
UiPath.Java.Activities 0.1.6774.30067-alpha
UiPath Studio 18.3.0-alpha.933

Preconditions

1. Create a Java project.
2. Create a Java Class with a constructor that takes a String[] as argument.
3. Create a method (static or instance) that takes a String[] as argument.
4. Package the project into a Jar file.

Steps to reproduce

1. Set the java path in the Java Scope activity.
2. Use a Create Java Object and a Invoke Java Method activities.
3. In the Parameters section of both activities create a new String[] argument.
4. In the Value field, put either {}, nothing or just leave it empty.

Expected results

• Java Object is created successfully.
• The method is executed successfully.

Actual results

• Both activities fail

Please see attachments for more details.