Invoke private method

 
import java.lang.reflect.Method;

class AnotherClass {
  private void m() {
  System.out.println("called"); 
  }
}

public class Main{
  public static void main(String... args) throws Exception{
    AnotherClass ac = new AnotherClass();
      Class<?> c = ac.getClass();
      Method m = c.getDeclaredMethod("m");
      m.setAccessible(true); // solution
      Object o = m.invoke(ac); // IllegalAccessException

  }
}