Java test report (seven) and summary

First, the test report

Experimental task details:

Analog train station ticket program is completed.
Requirements:
(1) the total number of votes 1000;
(2) simultaneously started ticket window 10;
(3) a second delay procedure ticket;
(4) a case of selling tickets or buy tickets negative numbers can not appear .

class Market  implements Runnable {

    private int ticket;

    public int getTicket() {
        return ticket;
    }

    void setTicket(int ticket) {
        this.ticket = ticket;
    }

    public void run() {
        for (int i = 1; i < 100; i++) {
            synchronized (this) {
                if (ticket > 0) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    ticket--;
                    System.out.println(Thread.currentThread().getName() + "售票成功;" + "剩余：" + ticket+"张");
                }
            }
        }
    }
}
 class seven {
    public static void main(String[] args){
        Thread[] t=new Thread[10];
        Market mar=new Market();
        mar.setTicket(1000);
        for(int i=0;i<10;i++){
            new Thread(mar,i+1+"号窗口").start();
        }
    }
}

 

Second, summary

Processes and threads

Process: the implementation of a program, that is, once the program is loaded into memory and ready to perform, it is a process. Process is a fundamental concept of resource allocation, but also is the basic unit is scheduled to run, is a unit of concurrent execution of the system.

Thread: implementation of a single process for each task is a thread. A thread is the smallest unit of the operation is performed in the process.

The difference between processes and threads

A thread is the smallest unit of program execution, and the process is the smallest unit of the operating system of allocating resources;

A process of one or more of threads, the thread is a different process routes execution code;

进程之间相互独立，但同一进程下的各个线程之间共享程序的内存空间(包括代码段，数据集，堆等)及一些进程级的资源(如打开文件和信号等)，某进程内的线程在其他进程不可见；

调度和切换：线程上下文切换比进程上下文切换要快得多。