java 多线程

package com.jack.test2;

public class MyRunnable implements Runnable {

    int tikets = 20;

    @Override
    public void run() {
        while (true) {
            if (tikets > 0) {
                System.out.println(Thread.currentThread().getName() + "卖票中：第" + (21 - tikets) + "张票");

                tikets--;
            }

        }
    }
}

package com.jack.test2;


public class main {

    public static void main(String[] args) {
        MyRunnable run= new MyRunnable();

        Thread r1 = new Thread(run);
        Thread r2 = new Thread(run);

        r1.start();
        r2.start();


    }


}

"D:\Program Files (x86)\Java\jdk1.8.0_71\bin\java.exe" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2018.3.3\lib\idea_rt.jar=59348:D:\Program Files\JetBrains\IntelliJ IDEA 2018.3.3\bin" -Dfile.encoding=UTF-8 -classpath "D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\charsets.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\deploy.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\access-bridge-32.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\cldrdata.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\dnsns.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\jaccess.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\jfxrt.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\localedata.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\nashorn.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\sunec.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\sunjce_provider.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\sunmscapi.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\sunpkcs11.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\ext\zipfs.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\javaws.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\jce.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\jfr.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\jfxswt.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\jsse.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\management-agent.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\plugin.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\resources.jar;D:\Program Files (x86)\Java\jdk1.8.0_71\jre\lib\rt.jar;D:\users\ligenyun\IdeaProjects\Test\out\production\day1" com.jack.test2.main
Thread-0卖票中：第1张票
Thread-1卖票中：第1张票
Thread-1卖票中：第3张票
Thread-1卖票中：第4张票
Thread-0卖票中：第2张票
Thread-1卖票中：第5张票
Thread-0卖票中：第6张票
Thread-1卖票中：第7张票
Thread-0卖票中：第8张票
Thread-1卖票中：第9张票
Thread-0卖票中：第10张票
Thread-1卖票中：第11张票
Thread-0卖票中：第12张票
Thread-1卖票中：第13张票
Thread-0卖票中：第14张票
Thread-1卖票中：第15张票
Thread-0卖票中：第16张票
Thread-1卖票中：第17张票
Thread-0卖票中：第18张票
Thread-1卖票中：第19张票
Thread-0卖票中：第20张票