CODEWITHSUNDEEP
javareflectionparameters
user2033666
user2033666

Reputation: 109

Call a method with String[] parameter using reflection

I have used all the suggestions I could find on StackOverflow and other sites for this. I am trying to invoke a method using reflection. Here is the code for my method:

public void my_method(String[] args) {

    for(int i=0; i<args.length; i++)
    {
        System.out.println(args);
    }
}

Here is the code I used for reflection

Class[] paramStringArray = new Class[1];    
paramStringArray[0] = String[].class;
String[] argu = {"hey", "there"};

Method method = cls.getDeclaredMethod("my_method", paramStringArray);
method.invoke(obj, new Object[]{argu});

My issue is that when I run the program, I see the output printed as: [Ljava.lang.String;@70a6aa31 [Ljava.lang.String;@70a6aa31

I have tried all the suggestions I could find. Can someone please help me with this?

Thanks!

Upvotes: 0

Views: 1812

Answers (2)

&#211;scar L&#243;pez
&#211;scar L&#243;pez

Reputation: 236124

The method my_method() receives as a parameter a String[], not a String. You're calling a different method. The code should look like this:

paramString[0] = String[].class;
Method method = cls.getDeclaredMethod("my_method", paramString);

To invoke it, pass a String[] as parameter:

method.invoke(obj, new String[]{"x"});

Also, the body of the loop in my_method() should refer to each element's position, not to the array itself:

System.out.println(args[i]);

Upvotes: 1

Lee Meador
Lee Meador

Reputation: 12985

You need to print args[i] and not what you have.

Also the method should be called with a new String[] instead of new Object[].

Upvotes: 1

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