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Rhino FAQ

Frequently Asked Questions about Rhino

How do I create a Java array from JavaScript?

You must use Java reflection. For instance, to create an array of java.lang.String of length five, do

var stringArray = java.lang.reflect.Array.newInstance(java.lang.String, 5);

Then if you wish to assign the string "hi" to the first element, simply execute stringArray[0] = "hi". Creating arrays of primitive types is slightly different: you must use the TYPE field. For example, creating an array of seven ints can be done with the code

var intArray = java.lang.reflect.Array.newInstance(java.lang.Integer.TYPE, 7);

When I try to execute a script I get the exception Required security context missing. What's going on?

You've likely missed placing the file in your class path at org.mozilla.javascript.resources.

Can I use Rhino in a web browser?

Rhino is a library for Java use, and not for general web browsers. However, a Java-based browser may use Rhino with scripts from a page in the same manner that any other Java program would.