Java Reflection with Object... as a parameter

Question

I'm wanting to use Java reflection to call a method on a class of mine that has the following signature:

public Object execute(Object...params)

In my loader class, I have the class loaded, but I'm not sure how to setup my getMethod call. Currently, I have something like this:

Method classEntry = _loadedClass.getMethod("execute", new Class[]{Object[].class});

I then try to invoke this method after creating a newInstance of my class by calling:

Object classObj = _loadedClass.newInstance();
classEntry.invoke(classObj, params); // params comes in from the method as Object...params

This is giving me a java.lang.NoSuchMethodException Exception. I know that my issue lies in my getMethod call. How should I set that up to accept a params object?

Mikhail Vladimirov · Accepted Answer · 2013-02-05 18:32:22Z

2

If params is of type Object [] then you need to call invoke like this:

classEntry.invoke(classObj, new Object [] {params});

But this does not explain NoSuchMethodException

answered Feb 5, 2013 at 18:32

Mikhail Vladimirov

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1 Comment

Tyler Wright Over a year ago

That fixed it! Adding that in fixed everything. I love quick fixes! Thanks again!

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