package com.mmall.concurrency.example.sync;

import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**

• @author ymy
  */
  @Slf4j
  public class SynchronizedExample1 {

  // 修饰一个代码块
  public void test1(int j) {
  synchronized (this) {
  for (int i = 0; i < 10; i++) {
  log.info(“test1 {} - {}”, j, i);
  }
  }
  }

  // 修饰一个方法
  public void test2(int j) {
  for (int i = 0; i < 10; i++) {
  log.info(“test2 {} - {}”, j, i);
  }
  }

  public static void main(String[] args) {
  SynchronizedExample1 example1 = new SynchronizedExample1();
  SynchronizedExample1 example2 = new SynchronizedExample1();
  ExecutorService executorService = Executors.newCachedThreadPool();
  executorService.execute(() -> {
  example1.test2(1);
  });
  executorService.execute(() -> {
  example2.test2(2);
  });
  }
  }

synchronized 关键字加与不加对程序运行有什么影响，影响是什么原因导致的，请问有详细说明吗，感觉就是把程序放上去，展示一下结果，没有详细说明synchronized 关键字加与不加对程序的影响。