JEP! 511: Module Import Declarations

JEP 511: Module Import Declarationsopenjdk.org

Just

import module java.base;

and you have String,List, Files, LocalDate etc. More incentives for lib creators to use modules

RUN:

com.wlodar.jeeps.jep511moduleimport.ModuleImportDemo

Transitive dependencies :

• if module M1 has requires transitive M4; then M4 contributes imports

• if M1 has plain requires M5; then M5 does not contribute imports.

So for workshop, the short rule is:

import module M includes exported packages from M and from modules readable through requires transitive, but not from plain requires.

requires

module A { requires B; }

• A can use B

• BUT modules depending on A do NOT see B

Meaning: Dependency is internal (private)

---

requires transitive

module A { requires transitive B; }

• A can use B

• AND modules depending on A ALSO get B automatically

Meaning: Dependency is re-exported (public)

Conflict resolution

RUN :

com.wlodar.jeeps.jep511moduleimport.ModuleImportAmbiguityDemo

Just old good manual import