能否在 Java 中将 run() 方法同步化?
是的,我们可以在 Java 中同步 run() 方法,但这不是必需的,因为此方法仅由一个线程执行。因此,run() 方法不需要同步。最好同步其他类的非静态方法,因为该方法会被多个线程同时调用。
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
Thread-0 is starting Thread-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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