[Head First Java] - 简单的建议程序

参考 - p481、p484

与我对接的业务层使用的是JAVA语言,因此花点时间入门java.下面几篇博客可能都是关于java的,我觉得在工作中可能会遇到的

简单的通信

• DailyAdviceClient(客户端程序)

import java.io.*;
import java.net.*;

public class DailyAdviceClient{
    
    
    public void go(){
    
    
        try{
    
    
            Socket s = new Socket("127.0.0.1", 4242);

            InputStreamReader streamReader = new InputStreamReader(s.getInputStream());
            BufferedReader reader = new BufferedReader(streamReader);

            String advice = reader.readLine();
            System.out.println("Today you should: " + advice);

            reader.close();
        } catch(IOException ex) {
    
    
            ex.printStackTrace();
        }
    }

    public static void main(String[] args) {
    
    
        DailyAdviceClient client = new DailyAdviceClient();
        client.go();
    }
}

• DailyAdviceServer(服务器端的程序)

import java.io.*;
import java.net.*;

public class DailyAdviceServer {
    
    
    String[] adviceList = {
    
    "Take smaller bites", "Go for the tight jeans. No they do NOT make you look fat.", "One word: inappropriate", "Just for today, be honest. Tell your boss what you *really* think", "You might want to rethink thath haircut."};

    public void go(){
    
    
        try {
    
    
            ServerSocket serverSock = new ServerSocket(4242);

            while(true) {
    
    
                Socket sock = serverSock.accept();

                PrintWriter writer = new PrintWriter(sock.getOutputStream());
                String advice = getAdvice();
                writer.println(advice);
                writer.close();
                System.out.println(advice);
            }
        } catch (IOException ex) {
    
    
            ex.printStackTrace();
        }
    }

    private String getAdvice() {
    
    
        int random  = (int) (Math.random() * adviceList.length);
        return adviceList[random];
    }

    public static void main(String[] args) {
    
    
        DailyAdviceServer server = new DailyAdviceServer();
        server.go();
    }
}

• 先运行服务器端代码,后运行客户端代码