同步块与同步方法差别示例

同步块与同步方法区别示例
代码示例：

public class SyncTest{    static Object obj = new Object();    public static void main(String[] args)    {                T1 t1 = new T1();        T2 t2 = new T2();                t1.start();        t2.start();    }        public static void test1()    {        synchronized(obj)        {            try            {                Thread.sleep(5000);            }            catch (InterruptedException e)            {                // TODO Auto-generated catch block                e.printStackTrace();            }            System.err.println("====");            System.err.println("test1");        }    }        public static synchronized void test2()    {        System.err.println("****");        System.err.println("test2");    }}class T1 extends Thread{    public void run()    {        SyncTest.test1();    }}class T2 extends Thread{    public void run()    {        SyncTest.test2();    }}

public static synchronized void test1()    {        try        {            Thread.sleep(5000);        }        catch (InterruptedException e)        {            // TODO Auto-generated catch block            e.printStackTrace();        }        System.err.println("====");        System.err.println("test1");    }