Class dot forName

Main.java

public class Main {

  public static void main(String[] args) throws ClassNotFoundException {
    // write your code here
    Class a = Class.forName("A");
    Class b = Class.forName("java.util.concurrent.Future");
  }

  static void vulnerableMethod() {
    System.out.println("pwned");
  }
}

class A {
  static {
    Main.vulnerableMethod();
  }
}