Modules

Question 1

Nemodularni java: prikaz pro kompilaci
* zdroje jsou v src
* knihovny lib/x.jar, lib/y.jar
* potrebuji resources
* vystup (classes) do out

Answer 1

java -cp resources:lib/x.jar:lib/y.jar -d out –source-path src

Question 2

Prikaz pro spusteni jaru x.jar

Answer 2

java -jar x.jar

Question 3

Prikaz pro zabaleni trid do jaru
* zkompilovane tridy jsou v out
* nazev bude x.jar
* mam manifest file

Answer 3

jar -c -f x.jar -C out -m=META-INF/MANIFEST.MF .

Question 4

Jak se muzu dostat k metodam a fieldum tridy, kam nemam prava?

Answer 4

Pomoci reflexe
Class c = Class.forName(“pkg.MyClass”);
c.getMethods()
c.getFields()

Question 5

Jak zjistim obsah modulu

Answer 5

java –list-module my.module

Question 6

Modularni java: prikaz pro kompilaci
* vystup do out
* zdroje na src
* zavisim na modulu lib/z.jar

Answer 6

javac –module-path lib/z.jar -d out -sourcepath src

Question 7

vytvoreni jaru x.jar pro modul
* classes jsou v out
* main class je pkg.MainClass

Answer 7

jar –create -f x.jar -C out –main-class pkg.MainClass .

Question 8

popis modulu

Answer 8

java –module-path x.jar –describe-module my.module

Question 9

Spusteni modulu v x.jar

Answer 9

java -jar x.jar

Question 10

Spusteni pkg.MainClass s argumenty v modulu my.module v out

Answer 10

java -p out -m my.module/pkg.MainClass args

Question 11

Jak se vola nemodularni aplikace, ktera potrebuje modul x.jar?

Answer 11

java -cp someApp.jar:x.jar pkg.MainClass

Question 12

Jak se v nemodularni aplikaci projevi modul?

Answer 12

Bude tam jako unnamed module, neboli automatic module