多线程的小DEMO （模拟卖票系统）

import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.List;

import javax.swing.text.DefaultEditorKit.InsertBreakAction;

public class Ticket implements Runnable {
    private int poll ;
    private int num = 900;
    private List<String> list = new ArrayList<>();
    private static NumberFormat nf = NumberFormat.getInstance();
    static{
        nf.setMinimumIntegerDigits(4);
        nf.setGroupingUsed(false);
    }
    public Ticket(){}
    public Ticket(int poll){
        this.poll = poll;
    }
    
    public void run() {
        while(true){
            synchronized (this) {
                if (num >= poll) {
                    System.out.println("票已售完");
                    return;
                }
                String tName = Thread.currentThread().getName();
                num++;
                System.out.println(tName + "\t出售\t" +nf.format(num));
            }
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
        }
    }
    
    public static void main(String[] args) {
        Runnable target = new Ticket(1000);
        String windows = "ABCDE";
        for(int i = 0; i<windows.length();i++){
            Thread te = new Thread(target, "柜台"+windows.charAt(i));
            te.start();
        }
        
    }
}