我在sockets教程中遇到了這個代碼。 首先,我們在它創建一個數組,並把clientThread的實例:java私有類成員
public class MultiThreadChatServer {
...
private static final clientThread[] threads = new clientThread[maxClientsCount];
...
clientSocket = serverSocket.accept();
int i = 0;
for (i = 0; i < maxClientsCount; i++) {
if (threads[i] == null) {
(threads[i] = new clientThread(clientSocket, threads)).start();
break;
}
}
這裏是clientThread類(的一部分):
class clientThread extends Thread {
private DataInputStream is = null;
private PrintStream os = null;
private Socket clientSocket = null;
private final clientThread[] threads;
private int maxClientsCount;
public clientThread(Socket clientSocket, clientThread[] threads) {
this.clientSocket = clientSocket;
this.threads = threads;
maxClientsCount = threads.length;
}
public void run() {
int maxClientsCount = this.maxClientsCount;
clientThread[] threads = this.threads;
try {
/*
* Create input and output streams for this client.
*/
is = new DataInputStream(clientSocket.getInputStream());
os = new PrintStream(clientSocket.getOutputStream());
os.println("Enter your name.");
String name = is.readLine().trim();
os.println("Hello " + name
+ " to our chat room.\nTo leave enter /quit in a new line");
for (int i = 0; i < maxClientsCount; i++) {
if (threads[i] != null && threads[i] != this) {
threads[i].os.println("A new user"+name+"entered the chat room");
}
}
我的問題是代碼的最後一行:線程[I] .os.println()。 'os'是一個私人成員,我們如何在它自己的類之外訪問它,或者沒有getter方法?
run方法是clientThread的成員。爲什麼它不能訪問clientThread實例上的私有成員操作系統? – odedsh
@lakshman - 這裏沒有反映,也沒有必要。 –
據我所知,它屬於自己的類... –