The method zhouchang() of type yuan must override or implement a supertype method
The method zhouchang() of type yuan must override or implement a supertype method
package?duotaichouxianglei;
public?class?yuan?extends?tuxing?{
public?void?zhouchang()?{
//?TODO?Auto-generated?method?stub
System.out.println("yuandezhouchang");
}
@Override
public?void?mianji()?{
//?TODO?Auto-generated?method?stub
}
}
2017-08-05
定義好抽象父類保存下即可。
2017-08-04
package?duotaichouxianglei;
?
public?class?yuan?extends?tuxing?{
?????float r;
????public?void?zhouchang()?{
????????//?TODO?Auto-generated?method?stub
????????zhouchang = 3.14*2*r;
????????System.out.println("yuandezhouchang");
?
????}
?
????@Override
????public?void?mianji()?{
????????//?TODO?Auto-generated?method?stub
?
????}
? ?public void yuan(float r){
????r = r;
?? ?}?
}
2017-08-04
？？？