reaper

第六次实训作业异常处理

微笑、不失礼 提交于 2020-01-24 01:51:12
1.编写一个类ExceptionTest,在main方法中使用try-catch-finally语句结构实现: 在try语句块中,编写两个数相除操作,相除的两个操作数要求程序运行时用户输入; 在catch语句块中,捕获被0除所产生的异常,并输出异常信息; 在finally语句块中,输出一条语句。 package qqq; import java.util.Scanner; / 。 / public class ExpetionText { static Scanner reaper=new Scanner(System.in); public static void main(String[] args) { int a,b,c = 0; System.out.println("请输入a,b:"); a=reaper.nextInt(); b=reaper.nextInt(); try{ c=a/b; }catch(ArithmeticException e) { System.out.println("除数不能为0!"); } finally{ System.out.println("结果:a/b="+c); } } } 请输入a,b: 3 0 除数不能为0! 结果:a/b=0 2.编写一个应用程序,要求从键盘输入一个double型的圆的半径,计算并输出其面积

Working with a severely limited interpreted language

橙三吉。 提交于 2019-12-11 01:37:11
问题 I'm coding in an embedded language called JS. I want to be able to call three functions in any order. (ABC, ACB, BAC, BCA, CBA, CAB.) The trick? The language doesn't have user-defined functions. It does have a conditional and a looping construct. I think I have three choices. Duplicate a whole bunch of code. Write a preprocessor (that would create all the duplicated code). Do a loop with three iterations, using an array to control which functionality gets called on each pass of the loop. I

Multithreading transactions hanging during persisting entity to postgresql via wildfly

匿名 (未验证) 提交于 2019-12-03 02:03:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I've got a bean definition with an entityManager like this: @Stateless public class JPABean { private static final Logger LOG = Logger.getLogger(JPABean.class); @PersistenceContext(unitName = "myPersistanceSettings") private EntityManager em; public void write(T o) { LOG.info("PERSISTING"); em.persist(o); LOG.info("FLASHING"); em.flush(); LOG.info("SUCCESS"); } My persistance.xml org.hibernate.ejb.HibernatePersistence java:jboss/datasources/myDS My api: @Path("activityAPI") public class ActivityAPI { private static final Logger log = Logger

<Closing connections idle longer than 60000 MILLISECONDS> <Closing expired connections>

有些话、适合烂在心里 提交于 2019-12-01 08:55:55
日志信息如下: 2017-07-05 18:28:34 -18705 [idle_connection_reaper] DEBUG - Closing expired connections 2017-07-05 18:28:34 -18723 [idle_connection_reaper] DEBUG - Closing connections idle longer than 60000 MILLISECONDS 2017-07-05 18:28:39 -23724 [idle_connection_reaper] DEBUG - Closing expired connections 2017-07-05 18:28:39 -23724 [idle_connection_reaper] DEBUG - Closing connections idle longer than 60000 MILLISECONDS 解决办法:   在ossClient使用之后应该立即关闭,ossClient.shutdown(); 来源: https://www.cnblogs.com/qingmuchuanqi48/p/11674466.html