我写了一个程序,它实现了一个简单的服务器 - 客户端连接和通信,但它只适用于一个客户端。如果我启动第二个客户端,则它不会执行任何操作,只会将“Out:0”作为输出。 (服务器没有响应它)
我在服务器中使用Threads,但我无法弄清楚,为什么这个解决方案无效。
有什么想法吗?
(我知道空的catch-es并不漂亮,但它只是一个示例代码。)
Server.java:
public class Server implements Runnable {
final int port;
public Server(int port){
this.port=port;
}
@Override
public void run(){
while(true){
try{
ServerSocket ss = new ServerSocket(port);
new ClientThread(ss).start();
}catch(Exception e){}
}
}
public static void main(String[] args){
new Server(1995).run();
}
private class ClientThread extends Thread{
Socket s;
Scanner sc;
PrintWriter pw;
ClientThread(ServerSocket ss){
try{
this.s = ss.accept();
}catch(Exception e){}
}
@Override
public void start(){
try{
String in,out;
sc = new Scanner(s.getInputStream());
pw = new PrintWriter(s.getOutputStream(), true);
int i=0;
do{
in = sc.nextLine();
System.out.println("In: " + in);
int tmp = Integer.parseInt(in)+1;
out = Integer.toString(tmp);
pw.println(out);
i++;
}while(i<10);
}catch(Exception e){}
}
}
}
Client.java:
public class Client implements Runnable{
String host;
int port;
Socket s;
Scanner sc;
PrintWriter pw;
public Client(String host, int port){
this.host=host;
this.port=port;
}
@Override
public void run(){
try{
s = new Socket(host, port);
sc = new Scanner(s.getInputStream());
pw = new PrintWriter(s.getOutputStream(), true);
String in, out;
out="0";
int i=0;
do{
pw.println(out);
System.out.println("Out: " + out);
in = sc.nextLine();
int tmp = Integer.parseInt(in)+1;
out=Integer.toString(tmp);
}while(i<10);
}catch(Exception e){}
}
public static void main(String[] args){
new Client("localhost", 1995).run();
}
}
答案 0 :(得分:0)
您不必覆盖start()
,必须覆盖run()
private class ClientThread extends Thread{
Socket s;
Scanner sc;
PrintWriter pw;
ClientThread(Socket s){
this.s = s;
}
@Override
public void run() {
try{
String in,out;
sc = new Scanner(s.getInputStream());
pw = new PrintWriter(s.getOutputStream(), true);
int i=0;
do{
in = sc.nextLine();
System.out.println("In: " + in);
int tmp = Integer.parseInt(in)+1;
out = Integer.toString(tmp);
pw.println(out);
i++;
}while(i<10);
}catch(Exception e){}
}
}
服务器主题:
@Override
public void run(){
try{
ServerSocket ss = new ServerSocket(port);
while(true){
Socket cl = ss.accept();
new ClientThread(cl).start();
}
}catch(Exception e){}
}