ScriptException converting json to map Java 8 Nashorn

Question

As with the recent Java update 8u60 java has supported json to map converstion using Nashorn Script Engine, I have been trying to checkout same using the sample code provided here . However, its giving me ScriptException with the below stacktrace. I'm using Java 8u65 to run the given code.

Stacktrace:

Exception in thread "main" javax.script.ScriptException: TypeError: Cannot call undefined in at line number 1 at jdk.nashorn.api.scripting.NashornScriptEngine.throwAsScriptException(NashornScriptEngine.java:455) at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:439) at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:401) at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:397) at jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:152) at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264) at JSONTest.main(JSONTest.java:8) Caused by: :1 TypeError: Cannot call undefined at jdk.nashorn.internal.runtime.ECMAErrors.error(ECMAErrors.java:57) at jdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:213)

Answer 1

Will you please check your JDK version? It should print something like:

$ java -version
java version "1.8.0_65"
Java(TM) SE Runtime Environment (build 1.8.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.65-b01, mixed mode)

I compiled and run JSONTest.java from Nashorn wiki page with both JDK 8u60 and 8u65. It worked as expected:

$ java JSONTest
343
2
4
5

I tested on Windows 7, 64 bit version with Cygwin shell (but that should not produce any difference in behavior)

Answer 2

确保包含jdk的jar文件在您的类路径中