????1.???????????????????????????????????
????????????????????????????????????????????10???????????????????????????10?????????????????????????????????
??????java?У?????????????????????byte??short??int??long?? float??double ?? char ?? boolean???????е?????????????????????飬?????????????
????2.????????????????????
?????????????????????????10????????????????????????????????10???????λ????????????
?????ü???????????
????Plane p = new Plane ();
????Plane p2 = p;
????new Plane ()????仰?????????п?????????????????????????
????Plane s = new Plane ();???????????????????p??p??????????????????????????С?
????p2 = p???????p?????????p2??
???????????????????????β?????????????????????????????????????????????????????????
?????????p??p2????????????????????????????????????????????????????????????????????
????int a = 1;
????int b = a;
????a = 2;
????println(b)//???1
????????int???????????????????????”???”???????????int b = a;???a???????b????????a?????????2??????b????κ????