List root directories - Java vs. Groovy different output

I try to list root directories with Groovy. There I only get local hard drives. The same statement in Java return local hard drives and all network drives. Anyone have an idea why Groovy behaves differently?

Working with:

• Groovy Version: 4.0.4 JVM: 1.8.0_151 Vendor: Oracle Corporation OS: Windows 10
• java version "1.8.0_151"

Groovy:

for (File root : File.listRoots()) {
    System.out.println(root);
}

Output:

B:\
C:\
E:\

Java:

import java.io.File;
import java.io.IOException;

public class Test {

    public static void main(String[] args) throws IOException {

        
        for (File root : File.listRoots()) {
            System.out.println(root);
        }
    }
}

Output:

B:\
C:\
E:\
J:\
P:\
S:\
U:\
V:\
X:\
Z:\