java

Java interface methods never used

由 半城伤御伤魂 提交于 2021-02-18 18:14:12
问题 So, I started using interfaces in Java a while ago. I have already created one, and I have a class , that implements that interface. So this is the interface itself: And this is the class that implements the Actor interface : But, as you can see in the first picture, no methods are used, ecxept for create() . The most strange thing is that everything works absolutely fine! Only these underlined words freak me out a bit) 回答1: Your methods are never actually used. This is IntelliJ's way of

How to configure persistence.xml provider tag

由 北城余情 提交于 2021-02-18 18:14:09
问题 Hey I'm learning this stuff, I don't really understand all of it and I have a problem, I don't know what to write in provider tag in persistence.xml Here are my persistence.xml and pom.xml files: pom.xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com

Receive Image as multipart file to rest service

由 馋奶兔 提交于 2021-02-18 18:13:42
问题 I am exposing a restful webservice, where i want to accept image as multipart file in the json body request i dont find anywhere a sample json request so as to hit my rest service from a rest client.my rest service uses this field above the class declaration @Consumes({MediaType.APPLICATION_JSON,MediaType.MULTIPART_FORM_DATA}) can anyone please get me a sample json request 回答1: The purpose of multipart/form-data is to send multiple parts in one request. The parts can have different media

How do I download all dependencies in advance?

由 本秂侑毒 提交于 2021-02-18 18:12:42
问题 I'm writing a circleci script and I'd like to resolve all dependencies up front once, because I plan to run maven many times in this script. I'd like to make this as fast as possible and I noticed that maven still reaches out to download poms, even if it has the latest dependencies. To avoid downloading poms, I put ran maven with -o , offline mode. But that caused errors about not having dependencies. So then I ran this command to download dependencies and plugins in advance: mvn dependency

How do I download all dependencies in advance?

由 风格不统一 提交于 2021-02-18 18:12:41
问题 I'm writing a circleci script and I'd like to resolve all dependencies up front once, because I plan to run maven many times in this script. I'd like to make this as fast as possible and I noticed that maven still reaches out to download poms, even if it has the latest dependencies. To avoid downloading poms, I put ran maven with -o , offline mode. But that caused errors about not having dependencies. So then I ran this command to download dependencies and plugins in advance: mvn dependency

Receive Image as multipart file to rest service

由 穿精又带淫゛_ 提交于 2021-02-18 18:12:21
问题 I am exposing a restful webservice, where i want to accept image as multipart file in the json body request i dont find anywhere a sample json request so as to hit my rest service from a rest client.my rest service uses this field above the class declaration @Consumes({MediaType.APPLICATION_JSON,MediaType.MULTIPART_FORM_DATA}) can anyone please get me a sample json request 回答1: The purpose of multipart/form-data is to send multiple parts in one request. The parts can have different media

FTPClient.storeFile() uploads slowly and then doesn't work

由 戏子无情 提交于 2021-02-18 18:11:53
问题 Android n00b trying to figure out file server upload. I'm having a lot of trouble trying to upload a file to my FTP server in Android using the storeFile method in FTPClient , testing on a Galaxy Nexus. Two problems. First, it runs very, VERY slowly - like a minute or more for a file of a few bytes before the code moves on (so that my display often goes to sleep before it finishes running). Second, no file arrives on the server when it's done. But the code does continue running and I don't

FTPClient.storeFile() uploads slowly and then doesn't work

由 限于喜欢 提交于 2021-02-18 18:11:40
问题 Android n00b trying to figure out file server upload. I'm having a lot of trouble trying to upload a file to my FTP server in Android using the storeFile method in FTPClient , testing on a Galaxy Nexus. Two problems. First, it runs very, VERY slowly - like a minute or more for a file of a few bytes before the code moves on (so that my display often goes to sleep before it finishes running). Second, no file arrives on the server when it's done. But the code does continue running and I don't

赠书|我是培训机构出身的程序员，不敢告诉任何人

由 五迷三道 提交于 2021-02-18 18:06:47
我之前也写过关于培训的文章，其实对于培训，我的看法是在慢慢改变的，现在的我一直觉得，培训真的是一条路，但是有一点，培训出身，有的时候真的会被有色眼镜看待，推荐一篇相关的文章给大家！ 文末赠书！ 作者丨褚杏娟 培训机构出身程序员和科班程序员之间，有鄙视链吗？ 1“谁都看不上培训机构的” “我是培训 + 外包出来的，确实有被甲方嫌弃过。”2016 年从电子信息专业毕业的小右说起这个话题有些落寞。 公务员考试失利的小右在大四上学期开始找工作，但因为学习成绩一般，工作找得并不顺利。这个情况持续一段时间后，小右决定去参加某培训机构的 Java 培训。“电子信息专业虽说属于计算机范畴，但其实和编程还不一样的，我也是没办法。”小右很无奈。 培训机构的课程对有一定 C、C++ 基础的小右来说还算比较轻松。他所在的那家培训机构的上课内容就是老师带着做做项目，教的代码在后面工作中可以复用。几个月后小右从培训机构毕业，第一份工作是北京当地蛮著名的一个外包机构，薪资 5K。 与同批毕业找到不错工作的同学们比，小右还是感到些许心酸。“上课的学费，我是走的贷款。和培训机构签过协议，毕业就可以找到工作。找不到，损失由培训机构承担；找得到，机构每个月要从我的薪资里面抽一部分还学费。“北京的生活成本本来就高，加上机构的抽成，对于刚毕业的小右来说，无疑压力很大。 在这家外包公司呆了一年后，小右跳槽了—

Race condition occurring during use of Parallel Streams and Atomic Variables

由 不羁岁月 提交于 2021-02-18 18:01:14
问题 When the following piece of code is getting executed I am getting exceptions in a random manner. byte[][] loremIpsumContentArray = new byte[64][]; for (int i = 0; i < loremIpsumContentArray.length; i++) { random.nextBytes(loremIpsumContentArray[i] = new byte[CONTENT_SIZE]); } AtomicBoolean aBoolean = new AtomicBoolean(true); List<Long> resultList = IntStream.range(0, 64* 2) .parallel() .mapToObj(i -> getResult(i, aBoolean, repositoryPath, loremIpsumContentArray )) .collect(Collectors.toList()
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