看看我的。指教一下啊
package?likun.yi;public?class?Vehicle?{ public?void?payload()?{????? System.out.println("載客");?? }} |
| 1 | package?likun.yi;public?class?Bus?extends?Vehicle?{?? public?void?payload()?{????? System.out.println("載客40人");??? }} |
| 1 | package?likun.yi;public?class?Ship?extends?Vehicle?{? public?void?payload()?{????? System.out.println("載客150人");?? }} |
| 1 | package?likun.yi;public?class?Plane?extends?Vehicle?{ public?void?payload()?{????? System.out.println("載客300人");?? }} |
| 1 | package?likun.yi;public?class?Init?{??? public?static?void?main(String[]?args)?{?????? //?TODO?Auto-generated?method?stub????? Vehicle?bus?=?new?Bus();??????? bus.payload();????????????? Vehicle?ship?=?new?Ship();????? ship.payload();???????????? Vehicle?plane?=?new?Plane();??????? plane.payload();??? }} |
載客40人
載客150人
載客300人
2020-06-30
可以這么寫。