public class Apple { public int a = 0; public Apple() { for (int i = 0; i < 50000; iPP) { a = i; } } } public class SimpleCounter { Apple apple; volatile Apple apple; public void setApple() { ...
In Java, I need a value to represent undefined (undefined state), which is used in a streaming check set, and null itself has a special meaning. I hope that the undefined ungiven value in the flow is equivalent to null, but it can also be judged that ...
Let me ask you a question : if you have just taken over a strange Spring application, the hang stops during startup, and the Spring container does not start or fail, so the hang is there all the time. There is no obvious error log in the business log (...
spring boot is packaged into jar to start, is there any way to modify the page template to update immediately, do not restart, do not do any other operation? if I PHP modified the template, it will take effect immediately. ...
ask your seniors for help. I have configured the java environment (jdk11). After clicking startup.bat, I can also access localhost8080, but there is a problem starting tomcat in the Windows service. The following error was reported: Baidu, Google a...
problem description I would like to ask how to copy the error message in the mac version of idea. In the windows version, there is an error message right click in the lower left corner to talk about a copy button, but the mac right button does not hav...
how can I mask the contents of the red box? ask the boss to answer. ...
for example, how to use these two notes (do not distinguish the difference between the two for the time being) I thought (method) added these two comments, then the return value of this method cannot be null, the editor will give the corresponding ...
I have the following code snippet in a parent root pom set dev as the default profile <profiles> <profile> <id>dev< id> <properties> <profileActive>dev< profile...
2019-01-18 13 13 INFO i.l.core.protocol.ConnectionWatchdog 16412 [lettuce-eventExecutorLoop-1-2] Reconnecting, last destination was 172.19.240.43 INFO i.l.core.protocol.ConnectionWatchdog 6379 2019-01-18 13 13 Reconnecting 1014 [lettuce-nioEventLoop-4-...
is the transaction in which multiple methods in the same class call annotations to each other the same wrote a method with a lot of rows, and there are a lot of operations on the database, and now you want to propose these operations as separate metho...
The string returned by the background contains the newline character "n ", dfafdafdaf,.... I output the content directly to the console and find: dfafdafdaf, .... console.log then I convert to jsonstring and output to the console: ...
problem description how does ModelAndView implement data binding and page jump How does the annotation @ ResponseBody realize that only strings are returned? ...
http download static file address, such as picture address, is not easy to find on the Internet, especially the suffix name has upper and lower case, the file name is mixed in Chinese and English, and the parsing is incorrect. I myself directly split acc...
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when dubbo specifies more than one zookeeper, what is the difference between clustering and unclustered zookeeper? If zookeeper is only a registry, whether it does not affect the function ...
2019-01-17 14:36:57,384 - Authentication failed for token submission [org.apache.shiro.authc.UsernamePasswordToken - null, rememberMe=false (0:0:0:0:0:0:0:1)]. Possible unexpected error? (Typical or expected login exceptions should extend from Authentic...
the company uses rocketmq message middleware. With the growth of business, it will be reported occasionally recently: [TIMEOUT_CLEAN_QUEUE] broker busy, start flow control for a while, period in queue: 206ms, size of queue: 5 I have made a version u...
problem description: one or more channel we know will register on EventLoop . This EventLoop not only listens to events on Channel , but also handles business logic (including outbound logic) after the event arrives, that is, Netty handler c...
FTL Code: carrierDispute: { infoId: "${fmbInfo.infoId}", title: "${mbInfo.title}", brief: "${mbInfo.brief}", content: "${mbInfo.content}", addAttachmentList:[] mbInfo.addAttachmengList ArrayList }...
routes can be displayed normally, but they always report errors . Code: import Vue from vue Vue.use (Router) export default new Router ({ mode: history , routes: [ { path: , redirect: Group Group_list }, { path: ...
is still a unique translation api? ...
sliding the Carousel component of antd has no effect, it can be slid on its official website, but it is not good for copy to come and put it on its own project! ...
not in executable format: File format not recognized Note: signature and everything is ready, and this error is always prompted. My friend s computer has the same problem as mine. ...
what if I want to debug my own client s weex page? For example, this page uses a lot of module, based on the native native side, like calling my own client web request, pop-up box construction, and so on. In this case, it is not possible to use WeexPlay...