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");    }}

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;    }}