* cannot be accepted for execution RejectedExecutionException是一个RuntimeException * @throws NullPointerException if {@code command} is null */publicvoidexecute(Runnable command){if(command==null)thrownewNullPointerException();/* * Proceed in 3 steps: * * 1. If fewer than corePoolSize threads...
使用将可能发生异常的代码放入try语句中,添加多个catch语句即可。 可以处理多种异常,但是同时只能处理一种异常。 try中除0异常和数组角标越界同时出现,只会处理一种。 publicclassMoreThanOneException {publicstaticvoidmain(String[] args) { System.out.println();int[] arr = { 1, 2}; arr=null;//print (...
publicvoidexecute(Runnablecommand){if(command==null)thrownewNullPointerException();/* * Proceed in 3 steps: * * 1. If fewer than corePoolSize threads are running, try to * start a new thread with the given command as its first * task. The call to addWorker atomically checks runState and...
自定义的未受检异常类都应该继承自RuntimeException类。 优先使用Java类库提供的未受检异常,它们满足了绝大多数API的异常抛出需要。 多数情况下,应该使用异常链将低层的异常(原因)传递给高层的异常,这对调试问题很有帮助。 不要吃掉异常!不要吃掉异常!不要吃掉异常!如果你catch了某个异常,一定要在catch块中处理...
public static void main(String[] args) throws InterruptedException, ExecutionException { ForkJoinPool pool = new ForkJoinPool(); CountTask task = new CountTask(1, 8); Future<Integer> future = pool.submit(task); if (task.isCompletedAbnormally()) { System.out.println(task.getException()); ...
try { int i = 1 / 0; } catch (Exception e) { Cat.logError(e); } 可以向错误堆栈顶部添加自己的错误消息, 如下代码所示:Cat.logError("error(X) := exception(X)", e); 2.2.2.3. MetricMetric 用于记录业务指标, 指标可能包含对一个指标记录次数, 记录平均值, 记录总和, 业务指标最低统计粒度...
: return "") return BigInteger(1, md.digest()).toString(32) } catch (e: NoSuchAlgorithmException) { e.printStackTrace() } return "" } }) .setImageCompressListener(object : OnImageCompressListener { override fun onStart() {} override fun onSuccess(index: Int, uri: Uri?) { success....
(cursor);lastRet = cursor++;returnnext;}catch(IndexOutOfBoundsException e) {checkForComodification();thrownewNoSuchElementException();}}publicvoidremove(){if(lastRet == -1)thrownewIllegalStateException();checkForComodification();try{AbstractList.this.remove(lastRet);if(lastRet < cursor)cursor--;...
catch (IOException|SQLException ex) { logger.log(ex); throw ex; } Note: If a catch block handles more than one exception type, then the catch parameter is implicitly final. In this example, the catch parameter ex is final and therefore you cannot assign any values to it within the catc...
Either log or rethrow this exception. When handling a caught exception, the original exception’s message and stack trace should be logged or passed forward. NONCOMPLIANT CODE EXAMPLE // Noncompliant - exception is lost try { /* ... */ } catch (Exception e) { ("context"); } ...