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Java Solutions August 2001/import java.*/Listing 3

Listing 3: — Prints minimal class information, including interfaces implemented

class ClassInspector
   public static void inspect(Class c)
      // Determine type of class
      String type;
      if (c.isInterface())
         type = "interface";
      else if (c.isArray())
         type = "array";
      else if (c.isPrimitive())
         type = "primitive";
         type = "class";
      // Print name
      System.out.println(type + " " + c.getName());

      // Print component type, if array
      if (type == "array")
         System.out.println("\tarray of " +

      // Print Superclass
      Class superClass = c.getSuperclass();
      if (superClass != null)
         System.out.println("\textends " +

      // Print interfaces implemented, if any
      Class[] interfaces = c.getInterfaces();
      for (int i = 0; i < interfaces.length; ++i)
         System.out.println("\timplements " +

   public static void main(String[] args)
      throws ClassNotFoundException
      Super[] arr = new Super[2];

/* Output:
class Sub
    extends Super
class Super
    extends java.lang.Object
class java.lang.Object
primitive int
array [LSuper;
    array of Super
    extends java.lang.Object
    implements java.lang.Cloneable
interface Inter
— End of Listing —

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