The Permissions class effectively ignores UnresolvedPermissions for a given class that are added after an actual instance of the class is added or passed to implies. Demonstrated with this test program:

import java.security.*;

public class Test {

    public static class FooPermission extends BasicPermission {
public FooPermission(String name) {
super(name);
}
    }

    public static void main(String[] args) throws Exception {
Permissions pc = new Permissions();
pc.add(new FooPermission("foo"));
pc.add(new UnresolvedPermission(FooPermission.class.getName(),
"bar", null, null));
if (!pc.implies(new FooPermission("bar"))) {
System.out.println("first test failed");
}
pc = new Permissions();
pc.add(new UnresolvedPermission(FooPermission.class.getName(),
"foo", null, null));
if (!pc.implies(new FooPermission("foo"))) {
throw new RuntimeException("oops");
}
pc.add(new UnresolvedPermission(FooPermission.class.getName(),
"bar", null, null));
if (!pc.implies(new FooPermission("bar"))) {
System.out.println("second test failed");
}
    }

}