java - 如何在 Java 中将对象发送到套接字数组

Question

例子:

ArrayList arraySocket=new ArrayList();
...
arraySocket.add(client);
...
for (Object arraySocket1 : arraySocket) {
      DataOutputStream dataToClient = new DataOutputStream(arraySocket1.getOutputStream()); // it's wrong. But i don't know how to correct it.
      dataToClient.writeBytes(cData.getData()+"\n");
}

Answer 1

你需要使用泛型。

ArrayList<Socket> arraySocket = new ArrayList<>(); // works in Java 7 and above

ArrayList<Socket> arraySocket = new ArrayList<Socket>(); // for versions 6 and below

我假设列表中对象的类型是Socket。然后你需要在 for 循环中使用正确的类型:

for (Socket arraySocket1 : arraySocket) {