12 Jul 2021
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The idea is to use this library from groovy or java interactive interpreter.
To use this library with groovy in interactive mode one needs to
use groovysh (don’t confuse with groovyConsole). It allows
to interactively execute groovy statements and use the result
in subsequent statements.
To use this library, corresponding jar file should be in the classpath.
Example:
Make sure, that JAVA_HOME points to JDK16 and it’s java is
on the path.
Run
/path/to/groovysh -cp /path/to/well-fed-cat.jar
Then in groovysh:
groovy:000> import dsemikin.wellfedcat.*
===> dsemikin.wellfedcat.*
groovy:000> import java.nio.file.Paths
===> dsemikin.wellfedcat.*, java.nio.file.Paths
groovy:000> dishesStoreFile = Paths.get("C:\\tmp\\WellFedCatDishStore.wds")
===> C:\tmp\WellFedCatDishStore.wds
groovy:000> dishesStore = new DishStoreSimpleFile(dishesStoreFile)
===> DishStoreSimpleFile@1c7350b0
groovy:000> dishStore = dishesStore
===> DishStoreSimpleFile@1c7350b0
groovy:000> dishStore.allDishes()
===> ...
Make sure, that we use JDK 16.
I should admit, that on Windows I like jshell more, than
groovysh, because it provides tab-completion, which is
very handy.
jshell --class-path path\to\well-fed-cat-lib-interactive-1.0-SNAPSHOT.jar
| Welcome to JShell -- Version 16
| For an introduction type: /help intro
jshell> import dsemikin.wellfedcat.*
jshell> import java.nio.file.Paths
jshell> var dishStoreFile = Paths.get("C:\\tmp\\WellFedCatDishStore.wds")
dishStoreFile ==> C:\tmp\WellFedCatDishStore.wds
jshell> var dishStore = new DishStoreSimpleFile(dishStoreFile)
dishStore ==> DishStoreSimpleFile@726f3b58
jshell> Utils.printDishes(dishStore.allDishes())
Dish[name=Eggs roasted, suitableForMealTimes=[SUPPER, LUNCH]]
Dish[name=Fish with Pesto, suitableForMealTimes=[LUNCH]]
Dish[name=Meat, suitableForMealTimes=[LUNCH]]
...
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