我的代码如下所示:
public class ExceptionTest {
public static Logger log = LoggerFactory.getLogger(ExceptionTest.class);
public final static ThreadFactory factory = new ThreadFactory() {
@Override
public Thread newThread(Runnable target) {
final Thread thread = new Thread(target);
log.debug("Creating new worker thread");
thread.setUncaughtExceptionHandler(new UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread t, Throwable e) {
log.error("Uncaught Exception", e);
}
});
return thread;
}
};
final static ExecutorService executor = Executors.newCachedThreadPool(factory);
public static void main(String[] args) {
executor.execute(new Runnable() {
@Override
public void run() {
while (true) {
System.out.println(Thread.currentThread().getName());
int i = 1;
int j = 0;
System.out.println(i / j);
}
}
});
}
}
控制台只打印一次消息。这意味着线程已死亡。还有什么其他方法可以防止线程死亡(除了
try catch
块,这是重复很多的代码)。 最佳答案
不,如果不使用try...catch
块,则无法实现此目的,请参见jls:
如果找不到可以处理异常的catch子句,则
当前线程(遇到异常的线程)是
终止。
而且,我认为在缓存的线程池中终止线程不是问题,因为下次提交新任务时,将创建一个新线程来处理它。
如果确实很重要,并且您不想重复代码,则可以编写这样的包装器类:
public class WrapperRunnable implements Runnable {
Runnable runnable;
public WrapperRunnable(Runnable runnable) {
this.runnable = runnable;
}
@Override
public void run() {
while (true) {
try {
runnable.run();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
并将
WrapperRunnable
提交给执行者:Runnable runnable = new Runnable() {
@Override
public void run() {
System.out.println(Thread.currentThread().getName());
int i = 1;
int j = 0;
System.out.println(i / j);
}
};
WrapperRunnable wrapperRunnable = new WrapperRunnable(runnable);
executor.execute(wrapperRunnable);
关于java - 在没有 try catch 的情况下抛出异常时,如何避免线程池中的线程死亡,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/49344618/