是不是做錯了 感覺不對呢 大佬指點一下
是不是做錯了 感覺不對呢 大佬指點一下
王大哈哈i
2019-07-09
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2019-07-09
可以用構造方法創建對象的時候往里面寫數據，另外，父類的屬性子類可以直接用 this. 就行了
public Bus(Int people,String way){
this.people = people;
this.way = way;
}
//創建對象,和構造方法對應
Vehicle obj1 = new Bus(40,"公交");
obj1.Vway();
2020-04-29
public?class?HelloWorld?{????public?int?people;????public?String?way;????public?void?Abc(){????????????System.out.println("交通工具為："+way+"\n乘車人數："+people?????????????);????????????}???public?class?bus?extends?HelloWorld{????public???bus(int?people,String?way){ ???this.people=people;???????this.way=way;??????this.Abc();????}???}public?class?run?extends?HelloWorld{????public???run(int?people,String?way){ ???this.people=people;???????this.way=way;???????this.Abc();????}???} public?static?void?main(String[]?args)?{???????? ? HelloWorld?num=new?HelloWorld(); bus?nums=num.new?bus(40,"公交");????????run?numss=nums.new?run(4,"跑步"); ???? }}2020-04-29
public class HelloWorld {
? ? public int people;
? ? public String way;
? ? public void Abc(){
? ? ? ?
? ? ?System.out.println("交通工具為："+way+"\n乘車人數："+people? ? ? ? ? ? ?);
? ? ? ??
? ? }
? ?public class bus extends HelloWorld{
? ? public? ?bus(int people,String way){
? ?this.people=people;
? ? ? ?this.way=way;
? ? ? this.Abc();
? ? }
? ?}
public class run extends HelloWorld{
? ? public? ?run(int people,String way){
? ?this.people=people;
? ? ? ?this.way=way;
? ? ? ?this.Abc();
? ? }
? ?}
public static void main(String[] args) {
? ? ? ??
?
HelloWorld num=new HelloWorld();
bus nums=num.new bus(40,"公交");
? ? ? ? run numss=nums.new run(4,"跑步");
? ??
}
}