我们可以在Java中同步run()方法吗?
是的,我们可以run()在Java中同步一个方法,但这不是必需的,因为该方法仅由单个线程执行。因此,run()方法不需要同步 。同步其他类的非静态方法是个好习惯,因为它同时被多个线程调用。
示例
public class SynchronizeRunMethodTest implements Runnable {   public synchronized void run() {
      System.out.println(Thread.currentThread().getName() + " is starting");
      for(int i=0; i < 5; i++) {
         try {
            Thread.sleep(1000);
            System.out.println(Thread.currentThread().getName() + " is running");
         } catch(InterruptedException ie) {
            ie.printStackTrace();
         }
      }
      System.out.println(Thread.currentThread().getName() + " is finished");
   }
   public static void main(String[] args) {
      SynchronizeRunMethodTest test = new SynchronizeRunMethodTest();
      Thread t1 = new Thread(test);
      Thread t2 = new Thread(test);
      t1.start();
      t2.start();
   }
}
输出结果
Thread-0 is startingThread-0 is running
Thread-0 is running
Thread-0 is running
Thread-0 is running
Thread-0 is running
Thread-0 is finished
Thread-1 is starting
Thread-1 is running
Thread-1 is running
Thread-1 is running
Thread-1 is running
Thread-1 is running
Thread-1 is finished
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