HDC调试需求开发（15万预算）,能者速来！>>>
场景：100个线程，乱序调用某对象的某一个方法。设定前提：此java无任何非此方法内的其它共享资源。
问题：请问此场景下存在线程安全问题吗？方法是被乱序调用，无相互干扰吧？内部机制是什么？
示例： package synmethod; import java.util.Random; public class MethodSync { /* * @Task : 测试 synchronized 修饰方法时锁定的是调用该方法的对象 * @param name 线程的标记名称 */ public synchronized void methodSynchronized(int i){ System.out.println(i + "sync Start a sync method"); Random r=new Random(); try{ if(i%2==0) { Thread.sleep(r.nextInt(10)); } }catch(InterruptedException e){} System.out.println(i + "sync End the sync method"); } public void method(int i){ System.out.println(i + " ---------Start a sync method"); Random r=new Random(); try{ if(i%2==0) { Thread.sleep(r.nextInt(10)); } }catch(InterruptedException e){} System.out.println(i + " -----------End the sync method"); } } package synmethod; import java.util.concurrent.CountDownLatch; public class Parent implements Runnable{ private CountDownLatch threadSignal; private int name; // private static MethodSync methodSync = new MethodSync(); private MethodSync methodSync; public Parent(int name){ this.name = name; } public Parent(int s, CountDownLatch threadSignal,MethodSync methodSync ) { this.name=s; this.threadSignal=threadSignal; this.methodSync=methodSync; } @Override public void run() { methodSync.methodSynchronized(name); methodSync.method(name); threadSignal.countDown(); } } package synmethod; import org.junit.Test; import javax.sound.midi.SysexMessage; import java.util.concurrent.CountDownLatch; public class MustTest { @Test public void etst() { Thread t1 = new Thread(new Parent(1)); Thread t2 = new Thread(new Parent(2)); t1.start(); t2.start(); } @Test public void etsts() throws InterruptedException { int threadNum = 50; // 初始化countDown CountDownLatch threadSignal = new CountDownLatch(threadNum); MethodSync methodSync=new MethodSync(); for(int i=0;i<50;i++){ Parent t=new Parent(i,threadSignal,methodSync); Thread t2 = new Thread(t); t2.start(); } threadSignal.await(); System.out.println("8888888888888888"); } }