Java Nashorn實例化方法

以爲我會試用Nashorn腳本功能。一切工作正常，我似乎能夠調用靜態方法從我的.js腳本像這樣：Java Nashorn實例化方法

var fun3 = function() { 
    print("Another day!"); 
    var Go = Java.type('somePack.Go'); 
    var result = Go.fun1('John Doe'); 
    print("\n" + result); 
}

在我的「加油」的Java類：

public static String fun1(String name) { 
    System.out.format("Hi there from Java, %s", name); 
    return "greetings from java"; 
}

不過，我想什麼要做的是使fun1方法非靜態，使其成爲一個實例化方法。

public String fun1(String name) { 
     System.out.format("Hi there from Java, %s", name); 
     return "greetings from java"; 
    }

在我的script.js我曾嘗試：

var Go = new Java.type('somePack.Go');

但我得到的錯誤：

Caused by: <eval>:19 TypeError: function type() { [native code] } is not a constructor function

有一種簡單的方法來實現我後？

感謝

完整的堆棧：

at jdk.nashorn.api.scripting.NashornScriptEngine.throwAsScriptException(NashornScriptEngine.java:470) 
    at jdk.nashorn.api.scripting.NashornScriptEngine.invokeImpl(NashornScriptEngine.java:392) 
    at jdk.nashorn.api.scripting.NashornScriptEngine.invokeFunction(NashornScriptEngine.java:190) 
    at somePack.Go.go(Go.java:35) 
    at somePack.Go.main(Go.java:16) 
Caused by: <eval>:19 TypeError: function type() { [native code] } is not a constructor function 
    at jdk.nashorn.internal.runtime.ECMAErrors.error(ECMAErrors.java:57) 
    at jdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:213) 
    at jdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:185) 
    at jdk.nashorn.internal.runtime.ECMAErrors.typeError(ECMAErrors.java:172) 
    at jdk.nashorn.internal.runtime.ScriptFunctionData.getBestConstructor(ScriptFunctionData.java:244) 
    at jdk.nashorn.internal.runtime.ScriptFunction.findNewMethod(ScriptFunction.java:758) 
    at jdk.nashorn.internal.runtime.ScriptObject.lookup(ScriptObject.java:1827) 
    at jdk.nashorn.internal.runtime.linker.NashornLinker.getGuardedInvocation(NashornLinker.java:104) 
    at jdk.nashorn.internal.runtime.linker.NashornLinker.getGuardedInvocation(NashornLinker.java:98) 
    at jdk.internal.dynalink.support.CompositeTypeBasedGuardingDynamicLinker.getGuardedInvocation(CompositeTypeBasedGuardingDynamicLinker.java:176) 
    at jdk.internal.dynalink.support.CompositeGuardingDynamicLinker.getGuardedInvocation(CompositeGuardingDynamicLinker.java:124) 
    at jdk.internal.dynalink.support.LinkerServicesImpl.getGuardedInvocation(LinkerServicesImpl.java:154) 
    at jdk.internal.dynalink.DynamicLinker.relink(DynamicLinker.java:253) 
    at jdk.nashorn.internal.scripts.Script$Recompilation$2$384$\^eval\_.fun3(<eval>:19) 
    at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:637) 
    at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:494) 
    at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:393) 
    at jdk.nashorn.api.scripting.ScriptObjectMirror.callMember(ScriptObjectMirror.java:199) 
    at jdk.nashorn.api.scripting.NashornScriptEngine.invokeImpl(NashornScriptEngine.java:386)

來源

2017-10-16 wax_lyrical

您應該使用

var Go = Java.type('somePack.Go'); 
var goObject = new Go();

來源

2017-10-17 12:13:32 wickund

VAR goObject =新（Java.type（ 'somePack.Go'））（）;本來可以工作，但... – wickund

Java Nashorn實例化方法

回答

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