要组合几个对象，这几个对象又都会变化，把几个对象关联起来，可以用桥接模式
看例子：人，车，路，人开车在路在行驶，人，车，路都可以变化
首先是人
package constructional.pattern.bridge; public interface People { void run(); } package constructional.pattern.bridge; public class Man implements People { private Road road; public Man(Road road) { super(); this.road = road; } @Override public void run() { System.out.print("man on the "); road.run(); } } package constructional.pattern.bridge; public class Woman implements People { private Road road; public Woman(Road road) { super(); this.road = road; } @Override public void run() { System.out.print("woman on the "); road.run(); } }下面是路
package constructional.pattern.bridge; public interface Road { void run(); } package constructional.pattern.bridge; public class HighSpeedRoad implements Road { private Vehicle vehicle; public HighSpeedRoad(Vehicle vehicle) { super(); this.vehicle = vehicle; } @Override public void run() { System.out.print("highspeed road run the "); vehicle.run(); } } package constructional.pattern.bridge; public class Street implements Road { private Vehicle vehicle; public Street(Vehicle vehicle) { super(); this.vehicle = vehicle; } @Override public void run() { System.out.print("street road run the "); vehicle.run(); } }最后是车
package constructional.pattern.bridge; public interface Vehicle { void run(); } package constructional.pattern.bridge; public class Car implements Vehicle { @Override public void run() { System.out.println("car."); } } package constructional.pattern.bridge; public class Bus implements Vehicle { @Override public void run() { System.out.println("bus."); } }如何组合
package constructional.pattern.bridge; public interface RunFactory { int MAN = 1; int WOMAN = 0; int STREET = 1; int HIGHSPEEDROAD = 2; int BUS = 1; int CAR = 2; People getRun(int people, int road, int vehicle); Road getRun(int road, int vehicle); Vehicle getRun(int vehicle); } package constructional.pattern.bridge; public class RunFactoryImp implements RunFactory { @Override public People getRun(int people, int road, int vehicle) { if(people == RunFactory.MAN) { return new Man(getRun(road, vehicle)); } else if(people == RunFactory.WOMAN) { return new Woman(getRun(road, vehicle)); } return null; } @Override public Road getRun(int road, int vehicle) { if(road == RunFactory.HIGHSPEEDROAD) { return new HighSpeedRoad(getRun(vehicle)); } else if(road == RunFactory.STREET) { return new Street(getRun(vehicle)); } return null; } @Override public Vehicle getRun(int vehicle) { if(vehicle == RunFactory.BUS) { return new Bus(); } else if(vehicle == RunFactory.CAR) { return new Car(); } return null; } }看一下测试代码
package constructional.pattern.bridge; public class Client { public static void main(String[] args) { int v1 = 1; int v2 = 2; int r1 = 1; int r2 = 2; int p0 = 0; int p1 = 1; RunFactory runFactory = new RunFactoryImp(); People pp1 = runFactory.getRun(p1, r1, v1); pp1.run(); People pp2 = runFactory.getRun(p1, r1, v2); pp2.run(); People pp3 = runFactory.getRun(p0, r2, v1); pp3.run(); } }下面是运行结果
转载于:https://www.cnblogs.com/liunianfeiyu/p/10115225.html
