类型：行为模式

定义一组算法，将每个算法都封装起来，并且使它们之间可以互换。策略模式使这些算法在客户端调用它们的时候能够互不影响地变化。

interface tyre_interface {    // tyre 轮胎    public void print_tyre_line();// 显示出轮胎的痕迹}//长痕迹轮胎类 class tyre_long_implement implements tyre_interface {    public void print_tyre_line() {        System.out.println("在路面上显示一个长轮胎痕迹");    }}//短痕迹轮胎类 class tyre_short_implement implements tyre_interface {    public void print_tyre_line() {        System.out.println("在路面上显示一个短轮胎痕迹");    }}class Car2 {    private String make_address;// 制造地    private int death_year;// 报废年限    private int speed;// 速度    private tyre_interface tyre_interface_ref;// 轮胎的样式    public String getMake_address() {        return make_address;    }    public void setMake_address(String make_address) {        this.make_address = make_address;    }    public int getDeath_year() {        return death_year;    }    public void setDeath_year(int death_year) {        this.death_year = death_year;    }    public int getSpeed() {        return speed;    }    public void setSpeed(int speed) {        this.speed = speed;    }    public tyre_interface getTyre_interface_ref() {        return tyre_interface_ref;    }    public void setTyre_interface_ref(tyre_interface tyre_interface_ref) {        this.tyre_interface_ref = tyre_interface_ref;    }    public void start() {        System.out.println("车的基本信息为：");        System.out.println("制造地make_address：" + this.getMake_address());        System.out.println("报废年限death_year：" + this.getDeath_year());        System.out.println("速度speed：" + this.getSpeed());        System.out.println("Car 起动了！");        System.out.println("Car高速行驶，遇到一个大转弯，路面显示：");        this.getTyre_interface_ref().print_tyre_line();    }}public class 策略模式 {	    public static void main(String[] args) {    	   tyre_long_implement tyre_long_implement = new tyre_long_implement();	        tyre_short_implement tyre_short_implement = new tyre_short_implement();	        Car2 car = new Car2();	        car.setDeath_year(8);	        car.setMake_address("北京朝阳区");	        car.setSpeed(200);	        car.setTyre_interface_ref(tyre_long_implement);	        car.start();    }}