java - GetMethod and invoke it via Reflection passing Object[] as param -

i have following code snippet throws exception, problem seem parameter i'm trying pass 'foo' method.

public void test() {    try {         class<?>[] paramtype = new class[] { object[].class };          method m = this.getclass().getmethod("foo", paramtype);          object tt = (object)new string("test");          m.invoke(this, new object[] { tt });      } catch (illegalaccessexception | illegalargumentexception             | invocationtargetexception | nosuchmethodexception | securityexception e) {         // todo auto-generated catch block         e.printstacktrace();     } }  public void foo(object[] params) {     system.out.println("ffffoooooo" + params); } 

exception:

java.lang.illegalargumentexception: argument type mismatch @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:483) @ reflection.myreflection.invokemethod(myreflection.java:50) @ reflection.myreflection.main(myreflection.java:20) 

can spot mistake??

the method.invoke method takes object[] parameter corresponds arguments want provide.

as you've got single parameter of type object[], need wrap in another object[]. example:

m.invoke(this, new object[] { new object[] { tt } }); 

or use fact it's varargs parameter on invoke:

object argument = new object[] { tt }; m.invoke(this, argument); 

note compile-time type of argument being object rather object[] important here, in order make compiler create array due varargs. if declare argument of type object[], compiler won't wrap in array.