Recent questions tagged java

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java - JasperReports fillReport too slow and resource consuming

I've found that JasperReports is really slow when filling a report from a Java app. The program hangs ... I improve report filling performance? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Serializing and deserializing a map with key as string

I am intending to serialize and deserialize a hashmap whose key is a string. From Josh Bloch's Effective Java, ... across JVMs? Thanks, Grace See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Persisting data suited for enums

Most projects have some sort of data that are essentially static between releases and well-suited for use as an enum ... by name, which is icky. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Configuring Spring MVC controller to send file to client

I think my scenario is pretty common. I have a database and I want my Spring MVC app to accept a request ... and trigger a file download action. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When to use Array, Buffer or direct Buffer

Question While writing a Matrix class for use with OpenGL libraries, I came across the question of whether to use Java ... : 1848.24 ms 51,79% See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How To Check Dependencies Between Jar Files?

I recently have taken the support and programming of a web system written in JSF. The code is kind ... displays the dependencies between them. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Class Object vs Hashmap

Is it good to use hashmap instead of using the object class...... Using Hashmap.... Map<String, String> ... health, memory requirement etc ... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Data-driven tests with jUnit

What do you use for writing data-driven tests in jUnit? (My definition of) a data-driven test is a test ... , not in one huge aggregate. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I list all the files in folder on tomcat?

I have got a folder with many excel documents in it on tomcat and i want those files to be available when i got ... is in that folder, it works. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to create a call adapter for suspending functions in Retrofit?

I need to create a retrofit call adapter which can handle such network calls: @GET("user") suspend fun getUser(): ... Is there a way to fix? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Import Spring config file based on property in .properties file

In my Spring xml configuration I'm trying to get something like this to work: <beans> <import resource="${file. ... classes and so on... Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JAXB namespace prefixes missing

I have generated Java classes from XSD, all works fine from a unmarshalling point of view. However, when I marshall ... from Java? Thanks a lot See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to change auto-generated code when creating new class in Eclipse

Whenever I create a new Java file in Eclipse and check off the option to add public static void main(String ... the TODO auto generated comment See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - GZIPInputStream to String

I am attempting to convert the gzipped body of a HTTP response to plaintext. I've taken the byte array of this ... write(buffer, 0, length); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to convert a string to a lambda expression?

I was thinking a bit and came up with an interesting problem, suppose we have a configuration (input) file ... else that only captures lambdas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Calculating time difference in Milliseconds

I am making a call to a method by passing ipAddress and it will return back the location of ipAddress ... Any suggestions will be appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to add Log4J2 appenders at runtime programmatically?

Is it possible to add Log4J2 appenders programmatically using the specifications from the XML configuration? I plan to define it ... { //... } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to Validate JSON with Jackson JSON

I am trying to use Jackson JSON take a string and determine if it is valid JSON. Can anyone suggest a code sample to use (Java)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When to use Spring prototype scope?

I want to know when should I exactly use the prototype scope in Spring? I have understood that singleton returns ... understand the need for it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Two conditions in one if statement does the second matter if the first is false?

Okay, so I have this piece of code tested and I found there isn't any exception thrown out. public static ... or some other languages? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Utility of Future.cancel(boolean) method

I was simply exploring the java.util.concurrent package. I learnt that the class 'Future' has a method boolean ... part that I am overlooking? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - IDEA JetBrains IntelliJ - Compile error on 'make' but fine when compiled using Maven and no errors reported by IntelliJ in the class file

So I have a maven module (module-A) in IntelliJ. I recently moved some classes from it into another new maven ... ..still happening...any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What is the difference between corePoolSize and maxPoolSize in the Spring ThreadPoolTaskExecutor

I have to send out massEmails to all users of a website. I want to use a thread pool for each email ... Currently I have approx. 10000 users. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Show keyboard automatically

Please explain me the issue about soft keyboard. For example, I have an EditText on my activity or ... keyboard will automatically appear. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Configure Sonar to exclude files from Maven pom.xml

I have a project configured in maven and the code analysis is done by SonarQube. I am trying to configure ... code? Thank you in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Formatting date in Thymeleaf

I'm brand new to Java/Spring/Thymeleaf so please bear with my current level of understanding. I did review this similar ... -10-04 14:10:42.183 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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289 views

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java - Changing cookie JSESSIONID name

I have a requirement of having to run multiple tomcat server in single physical box. While accessing these from a ... port in the same machine. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError.

I have used xuggle library in my project to trans code the video from mp4 to flv. I have used slf4j libraries ... this mess. Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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