java匿名内部类，多态，接口练习

Posted 2020-08-12

1多态以及接口调用方法：

public class Interface {

    public static void main(String[] args) {
        Al x = new Al();
        jian a = x;
        System.out.println(a.sub(1, 2));
        // 使用接口引用调用的方法
        animal zz = new animal();
        zz.jiao();
        zz = new dog();
        zz.jiao();
        zz = new cat();
        zz.jiao();
        //多态
    }

}
interface jia{
    public int add(int x, int y);
}
interface jian{
    public int sub(int x, int y);
}
interface cheng{
    public int mul(int x, int y);
}
interface chu{
    public int del(int x, int y);
}
class Al implements jia,jian,cheng,chu{
    public int sub(int x, int y){
        return x - y;
    }
    public int add(int x, int y){
        return x + y;
    }
    public int mul(int x, int y){
        return x * y;
    }
    public int del(int x, int y){
        return x / y;
    }
}
class animal{
    public void jiao(){
        System.out.println("我是animal");
    }
}
class dog extends animal{
    public void jiao(){
        System.out.println("汪汪");
    }
}
class cat extends animal{
    public void jiao(){
        System.out.println("喵喵");
    }
}

2.匿名内部类练习：

public class 匿名内部类 {
    public void drink(Beverages drink){
        System.out.println("运动员在饮用" + drink);
    }
    public static void main(String[] args) {
        DustMan dm = new DustMan();
        dm.cleanWithBroom();
        dm.cleanWithDustCollector();
        
        匿名内部类 sp = new 匿名内部类();
        sp.drink(new Beverages("橙汁"){
            public void addsomething(){
                System.out.println("橙汁老司机开车了");
            }
        });
        sp.drink(new Beverages("可乐"){
            public void addsomething(){
                System.out.println("可乐老司机开车了");
            }
        });
        sp.drink(new Beverages("雪碧"){
            public void addsomething(){
                System.out.println("雪碧老司机开车了");
            }
        });
        sp.drink(new Beverages("芬达"){
            public void addsomething(){
                System.out.println("芬达老司机开车了");
            }
        });
        sp.drink(new Beverages("绿茶"){
            public void addsomething(){
                System.out.println("绿茶妹妹开车了");
            }
        });
        
    }
}
class DustMan{
    public void cleanWithBroom(){
        Utility util = new Utility(){
            public void clean(){
                System.out.println("正在清洁卫生。。。");
            }
        };
        util.clean();//调用前面的方法；
    }
    public void cleanWithDustCollector(){
        ElectronicUtil util = new ElectronicUtil(){
            public void clean(){
                System.out.println("正在用吸尘器清洁卫生。。。");
            }
        };
        util.clean();//调用前面的方法；
    }
}
interface Utility{
    public void clean();
}
class ElectronicUtil{
    public void clean(){
        System.out.println("使用电子设备清洁卫生....");
    }
}
class Beverages{
    private String juiceName;
    public Beverages(String name){
        this.juiceName = name;
    }
    public String toString(){
        return juiceName;
    }
}