java例程练习（关于重写[overwrite/override])

1. public?class?Test?{??
2. ????public?static?void?main(String[]?args)?{??
3. ????????Student?student?=?new?Student();??
4. ????????Person?person?=?new?Person();??
5. ??????????
6. ????????person.setName("Tom");??
7. ????????person.setAge(18);??
8. ??????????
9. ????????student.setName("John");??
10. ????????student.setAge(19);??
11. ????????student.setSchool("AHU");??
12. ??????????
13. ????????System.out.println(person.getInfo());??
14. ????????System.out.println(student.getInfo());??
15. ??????????
16. ????}??
17. }??
18. ??
19. ??
20. class?Person?{??
21. ????private?String?name;??
22. ????private?int?age;??
23. ??????
24. ????public?void?setName(String?name)?{??
25. ????????this.name?=?name;??
26. ????}??
27. ??????
28. ????public?String?getName()?{??
29. ????????return?name;??
30. ????}??
31. ??
32. ????public?void?setAge(int?age)?{??
33. ????????this.age?=?age;??
34. ????}??
35. ??
36. ????public?int?getAge()?{??
37. ????????return?age;??
38. ????}??
39. ??????
40. ????public?String?getInfo()?{??
41. ????????return?"Name:?"?+?getName()?+?"\n"?+?"Age:?"?+?getAge();??
42. ????}?????
43. }??
44. ??
45. class?Student?extends?Person?{??
46. ????private?String?school;??
47. ??
48. ????public?void?setSchool(String?school)?{??
49. ????????this.school?=?school;??
50. ????}??
51. ??
52. ????public?String?getSchool()?{??
53. ????????return?school;??
54. ????}??
55. ??????
56. ????public?String?getInfo()?{??
57. ????????return?"Name:?"?+?getName()?+?"\n"?+?"Age:?"?+?getAge()??
58. ????????????+?"\nSchool:?"?+?getSchool();??
59. ????}??
60. }??