實例二：共享網絡設備（有外部狀態） 雖然網絡設備可以共享，但是分配給每一個終端計算機的端口(Port)是不同的，因此多臺計算機雖然可以共享同一個網絡設備，但必須使用不同的端口。我們可以將端口從網絡設備中抽取出來作為外部狀態，需要時再進行設置。

?

?

?

?

public class Switch implements NetworkDevice {private String type;public Switch(String type){this.type=type;}public String getType(){return this.type;} public void use(Port port){System.out.println("Linked by switch, type is " + this.type + ", port is " + port.getPort());} }

?

?

public class Port {private String port;public Port(String port){this.port=port; }public void setPort(String port){this.port=port;}public String getPort(){return this.port;} }

?

?

public interface NetworkDevice {public String getType();public void use(Port port); } public class Hub implements NetworkDevice {private String type;public Hub(String type){this.type=type;}public String getType(){return this.type;} public void use(Port port){System.out.println("Linked by Hub, type is " + this.type + ", port is " + port.getPort());} }

?

import java.util.*;public class DeviceFactory {private ArrayList devices = new ArrayList();private int totalTerminal=0;public DeviceFactory(){NetworkDevice nd1=new Switch("Cisco-WS-C2950-24");devices.add(nd1);NetworkDevice nd2=new Hub("TP-LINK-HF8M");devices.add(nd2);}public NetworkDevice getNetworkDevice(String type){if(type.equalsIgnoreCase("cisco")){totalTerminal++;return (NetworkDevice)devices.get(0);}else if(type.equalsIgnoreCase("tp")){totalTerminal++;return (NetworkDevice)devices.get(1);}else{return null;}}public int getTotalDevice(){return devices.size();}public int getTotalTerminal(){return totalTerminal;} }

?

public class Client {public static void main(String args[]){NetworkDevice nd1,nd2,nd3,nd4,nd5;DeviceFactory df=new DeviceFactory();nd1=df.getNetworkDevice("cisco");nd1.use(new Port("1000"));nd2=df.getNetworkDevice("cisco");nd2.use(new Port("1001"));nd3=df.getNetworkDevice("cisco");nd3.use(new Port("1002"));nd4=df.getNetworkDevice("tp");nd4.use(new Port("1003"));nd5=df.getNetworkDevice("tp");nd5.use(new Port("1004"));System.out.println("Total Device:" + df.getTotalDevice());System.out.println("Total Terminal:" + df.getTotalTerminal());} }

?

?

總結

以上是生活随笔為你收集整理的享元模式实例与解析实例二：共享网络设备（有外部状态）的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。