Recent questions tagged java

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java - Is it possible to create a File object from InputStream

Is there any way to create a java.io.File object from an java.io.InputStream ? My requirement is reading the File ... which I am trying to read. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to send parallel GET requests and wait for result responses?

I'm using apache http client within spring mvc 3.2.2 to send 5 get requests synchronously as illustrated. How ... results); return "index"; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to split read-only and read-write transactions with JPA and Hibernate

I have a quite heavy java webapp that serves thousands of requests/sec and it uses a master Postgresql db ... interest. Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do you merge in GIT on Windows?

I tried to use GIT however for me the biggest problem with it is that there is no tool for merge'ing. At ... that? I use Java and Eclipse. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Understanding the need for a DI framework

This might be a naive question. I'm currently learning the Spring framework and dependency injection. While the basic ... saw); sawMill.run(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Can Maven collect all the dependent JARs for a project to help with application deployment?

I'm just starting to use Maven, (evaluating it, really) and I need to be able to quickly ... {settings.localRepository}</classpathPrefix>) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Perm space vs Heap space

First, What is the difference between Perm space and Heap space (What and how does the JVM choose to use ... standard MVC type java application? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How should one unit test the hashCode-equals contract?

In a nutshell, the hashCode contract, according to Java's object.hashCode(): The hash code shouldn't change unless ... I'm adding that tag.] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Differences between requires_new and nested propagation in Spring transactions

I can't understand the behavior difference between the PROPAGATION_REQUIRES_NEW and PROPAGATION_NESTED propagation policies. It ... . Any clue? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - does System.currentTimeMillis() return UTC time?

I want to get the current UTC time in millis. I searched google and got some answers that System. ... current UTC time in android? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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401 views

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java - Kotlin Data Class from Json using GSON

I have Java POJO class like this: class Topic { @SerializedName("id") long id; @SerializedName("name") ... annotation in java variables ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Mvn install or Mvn package

I am new to Maven, I have a Java based web project with maven configured in my MyEclipse. Now if I modified ... -> Mvn install or Mvn package? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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277 views

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java - Get first and last day of month using threeten, LocalDate

I have a LocalDate which needs to get the first and last day of the month. How do I do that? eg ... formats. Using threeten LocalDate class. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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250 views

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java - Convert InputStream to BufferedReader

I'm trying to read a text file line by line using InputStream from the assets directory in Android. I want to ... how should I do that? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why charset names are not constants?

Charset issues are confusing and complicated by themselves, but on top of that you have to remember exact names ... and use Charset.UTF8? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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122 views

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java - Spring 3.0 set and get session attribute

I want to read a domain object (UserVO) from session scope. I am setting the UserVO in a controller ... getUserDetails().getFirstName); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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183 views

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java - Parallelizing a for loop

I have a for loop where the computation at iteration i does not depend on the computations done in the previous ... )? How to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What is the difference between the new operator and Class.newInstance()?

What is the difference between new operator and Class.forName(...).newInstance()? Both of them create instances ... difference is between them. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Custom annotation as Interceptor for a method logging

Java Gurus, I am pretty new for annotations and haven't searched for this a lot, so please bear with me... ... I get some hints about this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - ProGuard configuration for Guava with obfuscation and optimization

Looking for a ProGuard configuration for Guava that will obfuscate and optimize, as the default one that is ... specify additional program jars. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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130 views

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java - Spring HATEOAS embedded resource support

I want to use the HAL format for my REST API to include embedded resources. I'm using Spring HATEOAS ... HATEOAS to include embedded resources? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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213 views

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java - How to find the default JMX port number?

I am running a Java application on Java 6 VM on a remote Windows XP, on which I can run jvisualvm.exe ... netstat -apn but got nothing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Maven plugin not using Eclipse's proxy settings

I am using springsource tool suite 2.7.2, based on Eclipse 3.7. The Maven plugin comes now out of the box ... </proxy> </proxies> </settings> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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167 views

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java - How do I properly set the permgen size?

I have this VM with tomcat, java, and grails in it. I've been getting permgen errors so I looked around and ... anybody enlighten me on this? D: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - SpringMVC RequestMapping for GET parameters

How to make the RequestMapping to handle GET parameters in the url? For example i have this url http://localhost:8080 ... ) but it doesn't work. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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353 views

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java - Overriding equals() & hashCode() in sub classes ... considering super fields

Is there a specific rule on how Overriding equals() & hashCode() in sub classes considering super fields ?? knowing ... 0); return hash; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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454 views

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java - RestTemplate: How to send URL and query parameters together

I am trying to pass path param and query params in a URL but I am getting a weird error. below is the ... url please suggest. thanks in Advance See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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208 views

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java - How to change the alias of a key within a keystore?

I signed my JWS application MemorizEasy with a key whose alias is: memofile.reference.emma.jar=/Users/simpatico/. ... t Maven accept my alias? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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