public class FrogTest
{
 public static void main(String[] args)
 {
  Frog kermit = new Frog("Kermit", 5);
  System.out.println(kermit);
  kermit.jump();
  kermit.jump();
  kermit.jump();
  System.out.println(kermit);

  Frog legs = new Frog();
  legs.setName("Legs");
  System.out.println(legs);

  Frog frogger = new Frog("Frogger", 1);
  frogger.jump();
  frogger.jump();
  System.out.println(frogger);

 } // end main
} // end FrogDemo

/** Output

Kermit has leapt 5 times.
Kermit has leapt 8 times.
Legs has leapt 0 times.
Frogger has leapt 3 times.
Press any key to continue . . .

*/

저 데모를 이용해서 아웃풋이 나오도록 클래스 작성좀... 도저히 모르겠네 ㅠㅠ