Consider these classes:
package p;
public class Lib {
void main(String... args) {
System.err.println("Lib!");
}
}
and:
import p.Lib;
public class Main extends Lib {
public void main() {
System.err.println("Main!");
}
}
Note the classes are in different packages. Running this on JDK 26 yields:
$ jdk-26/bin/java Main.java
Lib!
that is not correct - the method `Lib.main(String[])` is package private, and
is not inherited to `Main`, i.e. not a member of `Main`, and hence the launcher
should not use it. The launcher should only inspect methods that are members
(direct or inherited) of `Main`.
This PR fixes that by only using package-private methods in they are declared
in the same class as is the main class. Testing is enhanced to cover all
related cases I/we were able to find.
-------------
Commit messages:
- Adding bug number.
- Merge remote-tracking branch 'upstream-ssh/master' into JDK-8377004
- Adding more testcases.
- 8377004: Java Launcher allows inheriting a package-private main from another
package
Changes: https://git.openjdk.org/jdk/pull/30221/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30221&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8377004
Stats: 227 lines in 2 files changed: 211 ins; 5 del; 11 mod
Patch: https://git.openjdk.org/jdk/pull/30221.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/30221/head:pull/30221
PR: https://git.openjdk.org/jdk/pull/30221
