UC知道学习JAVA，能进来帮一下么？
来源：百度知道 编辑：UC知道 时间：2024/06/14 05:59:43
interface Fruits {
double price = 30;
double num = 50;
double getTotal();
double getAdd();
}
class Apple implements Fruits {
private String color;
private int num;
private int price;
Apple(String color, int num, int price) {
this.color = color;
this.num = num;
this.price = price;
}
double getTotal() {//这里也出错说Cannot reduce the visibility of the inherited method from Fruits
return this.num * this.price;
}
double getAdd() { //这里会出错，说是Cannot reduce the visibility of the inherited method from Fruits
return this.num + this.price;
}
}
double price = 30;
double num = 50;
double getTotal();
double getAdd();
}
class Apple implements Fruits {
private String color;
private int num;
private int price;
Apple(String color, int num, int price) {
this.color = color;
this.num = num;
this.price = price;
}
double getTotal() {//这里也出错说Cannot reduce the visibility of the inherited method from Fruits
return this.num * this.price;
}
double getAdd() { //这里会出错，说是Cannot reduce the visibility of the inherited method from Fruits
return this.num + this.price;
}
}
错误的意思是要你写成，和类型没有任何关系：
public double getTotal()
public double getAdd()
private int num;
private int price;
你这里的num和price定义成int 了,这样会和接口的double混淆的,改成double吧
恩，这回楼上的说对了，没有错误了，路过，学习啦！呵呵！
数据类型好乱，呵呵，跟我开始一样，加油学习吧。。。