使用反射特性獲取類的訪問權限

public class ClassDemo {

   public static void main(String[] args) {

     ClassDemo c = new ClassDemo();
     Class cls = c.getClass();

     // returns the Java language modifiers for this class
     int i = cls.getModifiers();
     String retval = Modifier.toString(i);
     System.out.println("Class Modifier = " + retval);
   }
}