how to fix this reflection code in java? - reflection

Question

i am trying to make a test runner first class is test runner and second one is class that testet and last one is my main page.. i want to reach the tester method with method invoke but this is not working.
public class tester {
public tester()
{
}
#Test
public void testTopla(){
int sayi1 = 10;
int sayi2 = 20;
int gercekSonuc = 30;
//
islem isl = new islem(sayi1, sayi2);
int sonuc = isl.topla();
Assert.assertTrue("Sonucta Hata Var", sonuc == gercekSonuc);
}
and this is what i am testing
public class islem {
private int sayi1;
private int sayi2;
public islem(){
}
public islem(int sayi1, int sayi2){
this.sayi1 = sayi1;
this.sayi2 = sayi2;
}
public int getSayi1() {
return sayi1;
}
public void setSayi1(int sayi1) {
this.sayi1 = sayi1;
}
public int getSayi2() {
return sayi2;
}
public void setSayi2(int sayi2) {
this.sayi2 = sayi2;
}
public int topla(){
return this.sayi1 + this.sayi2;
}
and this
public class Deneme1UI extends UI {
#WebServlet(value = "/*", asyncSupported = true)
#VaadinServletConfiguration(productionMode = false, ui = Deneme1UI.class)
public static class Servlet extends VaadinServlet {
}
#Override
protected void init(VaadinRequest request) {
final VerticalLayout layout = new VerticalLayout();
layout.setMargin(true);
setContent(layout);
Class hilmi = tester.class;
tester obj = new tester();
for(Method method : hilmi.getDeclaredMethods())
{
method.invoke(obj);
}

Answer 1

look at this:
http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/Method.html#invoke%28java.lang.Object,%20java.lang.Object...%29
the first parameter of the invoke() function needs to be an instance of the reflected class
in your case an instance of the class tester
you will have to create an instance of the tester class before you can invoke its methods