IllegalArgumentException with constructing class using reflection and array arguments

Question

running the following code:

public class Test {

    public Test(Object[] test){

    }

    public static void main(String[] args) throws Exception{
                


        

Answer 1

The newInstance() method of the constructor class takes an array of objects. Each item in the array is an argument of the constructor you are invoking. Your class's constructor takes an object array so you need to have an object array inside the array you pass to the new instance method

public static void main(String[] args) throws Exception{
            Constructor cd = Test.class.getConstructor(Object[].class);
            Object[] objs = {1, 2, 3, 4, 5, 6, 7, 8};
            Object[] passed = {objs};
            cd.newInstance(passed);
    }