线程安全问题（锁机制，同步技术）

package com.lqf;

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class SyncRunableImpl implements Runnable{
    private int ticker=100;
    Lock lock=new ReentrantLock();
    //创建一个锁对象
    Object obj=new Object();
//    @Override
//    public void run(){
//        while (ticker>0){
//            synchronized (obj){
//                try {
//                    Thread.sleep(1000);
//                }catch (InterruptedException e){
//                    e.getMessage();
//                }
//                System.out.println(ticker+"ticker");
//                ticker--;
//            }
//
//        }
//
//    }
@Override
public void run(){
    while (ticker>0){
           lock.lock();
            try {
                Thread.sleep(1000);
                System.out.println(ticker+"ticker");
                ticker--;
            }catch (InterruptedException e){
                e.getMessage();
            }finally {
                lock.unlock();
            }
    }

}

}