Java's visibility rules are tricky at times. Do you know what this will print? package p; import static p.A.x; class A { static String x = "A.x"; } class B { String x = "B.x"; } class C { String x = "C.x"; class D extends B { void m() { System.out.println(x); } } } … Continue reading A Curious Java Language Feature and How it Produced a Subtle Bug
Tag: visibility
The depths of Java: API leak exposed through covariance
Java can be very tricky some times, especially in API design. Let's have a look at a very interesting showcase. jOOQ strongly separates API from implementation. All API is in the org.jooq package, and public. Most implementation is in the org.jooq.impl package and package-private. Only factories and some dedicated base implementations are public. This allows … Continue reading The depths of Java: API leak exposed through covariance