Callable

Main.java

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class Main {

  public static void main(String[] args) throws ExecutionException, InterruptedException {
    // write your code here
    ExecutorService executorService = Executors.newFixedThreadPool(10);
    Future<Integer> future = executorService.submit(new MyCallable());
    System.out.println(future.get());
    executorService.shutdown();
  }

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

class MyCallable implements Callable<Integer> {

  @Override
  public Integer call() throws Exception {
    Main.vulnerableMethod();
    return 1;
  }
}