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Nashorn

Deck JAVA 8 ( Nashorn )

TermDefinition
Acessando classes Java jjs> Packages.MyPackage [JavaPackage MyPackage] jjs> Packages.MyPackage.MyClass [JavaClass MyPackage.MyClass]
Criando objetos Java jjs> var HashMap = Java.type("java.util.HashMap") jjs> var mapDef = new HashMap() jjs> var map100 = new HashMap(100)
Usando Java Beans jjs> var Date = Java.type("java.util.Date") jjs> var date = new Date() jjs> date.year + 1900 2013 jjs> date.year = 2014 - 1900 114 jjs> date.year + 1900 2014
Criando um mecanismo de scrip Nashorn ScriptEngine engine = factory.getEngineByName("nashorn");
Trabalhando com números Java jjs> var intNum = 10 jjs> intNum.class class java.lang.Integer jjs> var dblNum = Number(intNum) jjs> dblNum.class class java.lang.Double
Extensão de classe em Java var Run = Java.type("java.lang.Runnable"); var MyRun = Java.extend(Run, { run: function() { print("Run in separate thread"); } }); var Thread = Java.type("java.lang.Thread"); var th = new Thread(new MyRun());
Habilitar extensões de script em shell(UNIX) jjs -scripting
Here Document $ jjs -scripting heredocs.js So... foo = bar and the current time is Thu Aug 01 2013 16:21:16 GMT+0200 (CEST) $
Shell invocations var lines = 'ls -lsa'.split("\n"); for each (var line in lines) { print("|> " + line); }
Nashorn interpreta as coleções Java como arrays jjs> var ArrayList = Java.type("java.util.ArrayList") jjs> var alist = new ArrayList() jjs> alist.add("a") true jjs> alist.add("b") true jjs> alist.add("c") true jjs> alist[1] b jjs> for each (var i in alist) print(i) a b c
Strings são interpretadas pelo Nashorn como objetos java.lang.String jjs> var a = "abc" jjs> a.class class java.lang.String jjs> var b = a + "def" jjs> b.class class jdk.nashorn.internal.runtime.ConsString jjs> var c = String(b) jjs> c.class class java.lang.String
Objetos Globais $ARG >> jjs -scripting -- arg1 arg2 arg3 jjs> $ARG arg1,arg2,arg3 jjs> $ARG[1] arg2
Objetos Globais $ENV jjs> $ENV.USER johndoe jjs> $ENV.PWD /foo/bar
Objetos Globais $EXEC() jjs> $EXEC("ls -l") total 0 drwxr-xr-x+ 1 johndoe staff 4096 Aug 18 11:03 dir -rwxrw-r-- 1 johndoe staff 168 Aug 19 17:44 file.txt jjs>
load()Essa função carrega e avalia um script de um caminho, URL, ou um objeto. jjs> load("/foo/bar/script.js") jjs> load("http://example.com/script.js")
A função Java.type pode ser usada para se obter referências precisas do tipo Java var LinkedList = Java.type( "java.util.LinkedList"); var primitiveInt = Java.type( "int"); var arrayOfInts = Java.type( "int[]");
Interpretar uma aplicação de script JavaFX com o Nashorn, usando o mando jjs com a opção -fx jjs -fx JavaFXscript.js
Funções function sqr(x) x * x; print(sqr(3));
Created by: marcelotmr