并发重入锁，reentrantLock

并发重入锁集合增加

package com.example.demo;

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

public class TestThread implements Runnable {
    static  Integer i = 0;
    public static ReentrantLock lock = new ReentrantLock();
    //static TestThread instance = new TestThread();
    public static void main(String[] args) throws InterruptedException {
          //ReenterLock rl = new Reenre
          Thread t1 = new Thread(new TestThread());
          Thread t2 = new Thread(new TestThread());
          t1.start();
          t2.start();
          t1.join();
          t2.join();
        System.out.println(i);

    }

    @Override
    public void run() {
        for(int j=0;j<100000;j++){
            try {
                lock.lock();
                i++;
            }finally {
                lock.unlock();
            }
            /*synchronized (instance){

            }*/

        }
    }

}