抽象类与抽象方法
//抽象类 意义：单纯被继承
[权限修饰符]abstract class 类名{
// 抽象方法 继承抽象类的所有子类 都要重写抽象类中的抽象方法
[权限修饰符] abstract 方法返回值类型 方法名(参数列表); //无方法体
}
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public class GoShopping {
public static void main(String[] args) {
Shopping tb = new TBShopping();
tb.market = "淘宝";
tb.goods = "衣服";
System.out.println("在"+tb.market+tb.shop()+tb.goods);
Shopping xx = new XXShopping();
xx.market = "实体店";
xx.goods = "鞋子";
System.out.println("在"+xx.market+xx.shop()+xx.goods);
}
}
// 抽象类 买东西
abstract class Shopping {
public String market; //购买地
public String goods; //商品
public abstract String shop(); //抽象方法 购买行为
}
class TBShopping extends Shopping{ //网购类
public String shop(){
return "网购";
}
}
class XXShopping extends Shopping{ //线下购类
public String shop(){
return "线下买";
}
}
/*在淘宝网购衣服
在实体店线下买鞋子*/
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public class GoShopping {
public static void main(String[] args) {
Shopping tb = new TBShopping();
tb.market = "淘宝";
tb.goods = "衣服";
System.out.println("在"+tb.market+tb.shop()+tb.goods);
Shopping xx = new XXShopping();
xx.market = "实体店";
xx.goods = "鞋子";
System.out.println("在"+xx.market+xx.shop()+xx.goods);
}
}
// 抽象类 买东西
abstract class Shopping {
public String market; //购买地
public String goods; //商品
public abstract String shop(); //抽象方法 购买行为
}
class TBShopping extends Shopping{ //网购类
public String shop(){
return "网购";
}
}
class XXShopping extends Shopping{ //线下购类
public String shop(){
return "线下买";
}
}
/*在淘宝网购衣服
在实体店线下买鞋子*/
接口
