How get by code list of default Groovy imports

Question

I want to get programmatically in any form a list of default packages imported by Groovy. Like the documentation says:

All these packages and classes are imported by default, i.e. you do not have to use an explicit import statement to use them: java.io.*

java.lang.*

java.math.BigDecimal

java.math.BigInteger

java.net.*

java.util.*

groovy.lang.*

groovy.util.*

In others words, check whether import is required (for any classes out of this list) or not. The List should be valid for current version and potentially for future versions.

Answer 1

The static variable org.codehaus.groovy.control.ResolveVisitor.DEFAULT_IMPORTS is an array of String​ that contains all default imported package names.

Currently it's (printed) value is:

[java.lang., java.io., java.net., java.util., groovy.lang., groovy.util.]

Check the ResolveVisitor doc for more info. If you want to know how to add custom packages to the defaults check this Jira issue.