已采纳回答 / weibo_只是梦一場____03908
格式 :内部类名 对象名 = new 内部类名();----------------------------new+构造方法 (与类名相同、无返回)==>实例化。
2017-04-21
package com.duotai;
public class InitialTraffic {
public static void main(String[] args) {
Traffic t=new Traffic();
t.transport(0);
Traffic p=new Plane();
p.transport(400);
Traffic b=new Bus();
b.transport(40);
Traffic s=new ship();
s.transport(300);
}}
public class InitialTraffic {
public static void main(String[] args) {
Traffic t=new Traffic();
t.transport(0);
Traffic p=new Plane();
p.transport(400);
Traffic b=new Bus();
b.transport(40);
Traffic s=new ship();
s.transport(300);
}}
2017-04-20
package com.duotai;
public class Plane extends Traffic{
public void transport(int num){
System.out.println("飞机的运输方式为在天上飞,能载"+num+"人");
}
}
public class Plane extends Traffic{
public void transport(int num){
System.out.println("飞机的运输方式为在天上飞,能载"+num+"人");
}
}
2017-04-20
package com.duotai;
public class ship extends Traffic{
public void transport(int num){
System.out.println("轮船的运输方式为在海上行,能载"+num+"人");
}
}
public class ship extends Traffic{
public void transport(int num){
System.out.println("轮船的运输方式为在海上行,能载"+num+"人");
}
}
2017-04-20
package com.duotai;
public class Bus extends Traffic{
public void transport(int num){
System.out.println("大巴的运输方式为在陆地跑,能载"+num+"人");
}
}
public class Bus extends Traffic{
public void transport(int num){
System.out.println("大巴的运输方式为在陆地跑,能载"+num+"人");
}
}
2017-04-20
package com.duotai;
public class Traffic {
public void transport(int num){
System.out.println("以下交通工具的运输方式及人数"+num);
}
}
public class Traffic {
public void transport(int num){
System.out.println("以下交通工具的运输方式及人数"+num);
}
}
2017-04-20
abstract class Shape{
abstract double sum();
abstract double mul();
}
abstract double sum();
abstract double mul();
}
2017-04-20