main.java

多线程与并发处理是程序设计好坏优劣的重要课题

public class Main {
    public static void main(String[] args) {
        System.out.println("main BEGIN");
        Host host = new Host();
        host.request(10, 'A');
        host.request(20, 'B');
        host.request(30, 'C');
        System.out.println("main END");
    }
}