Java Thread.Join（）方法不等待线程完成

Question

I have this section of code: CustomerClient is basically a class that extends Thread. I am trying to spawn multiple threads but only one at a time. However Im getting an illegal thread state exception. What am I doing wrong?

CustomerClient cusClient = new CustomerClient("B", server_IP_1,
            server_Port_1, server_IP_2, server_Port_2);

    while (true) {
        System.out.println("new thread A");
        cusClient.start();
        cusClient.join();
    }

Answer 1

A thread can be started only once. So need to initialize the thread object everytime in the loop.

while (true) {
    CustomerClient cusClient = new CustomerClient("B", server_IP_1,
        server_Port_1, server_IP_2, server_Port_2);
    System.out.println("new thread A");
    cusClient.start();
    cusClient.join();
}