Recent questions tagged JAVA

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java - create a .war file from gwt-project

How do I create a .war-file from my gwt-project in 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 - WebView.loadData not working on Android 9.0 (API-29)

I have an article app, I am showing articles in WebView. In Android version 9.0 (API-29) this WebView is not ... , how can I solve this problem? 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 - Change thread pool size in Jetty 9

How can I change thread pool size in embedded Jetty 9? Do we need any specific component for 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 - Can not get key from KeyStore

I try to get Key from KeyStore. I created a keystore by Keytool: keytool -genkeypair -dname "cn=Mark ... .GenerateXML.main(GenerateXML.java:31) 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 - Is there Gradle "dependencies " task for buildScript dependencies?

One can run gradlew dependencies to learn about dependencies of module tasks. It there a way to find transitive dependencies of ... { .... } } 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 - scope of private constructor in Nested Class

This is more of a puzzle than question. I have the following code: public class PrivateBaseConstructor { public ... static within one 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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java - Parent pom and microservices

We have several projects that are microservices, every project is independent (running on separate spring boot server, ... only the parent pom) 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 - Hibernate Annotations : No default constructor for entity

I am trying to persist the objects generated by JAXB. Here is the sample structure: @Column(name = " ... store and retrieve the information? 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 - Spring Cacheable vs CachePut?

@CachePut or @Cacheable(value = "CustomerCache", key = "#id") public Customer updateCustomer(Customer customer) ... my understanding correct? 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 obtain index of a given LinkedHashSet element without iteration?

Is it even possible? Say you have private Set<String> names = new LinkedHashSet<String>(); and Strings are " ... )) { break; } } 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 modules and JAR files?

I am learning about Java 9 from What's New in Java9 and one of the hot topics in the discussion is The ... module different from a JAR file? See Question&Answers more detail:os...

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

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133 views

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java - Is it possible to download a file with HTTP POST?

Is it possible to download a file with HTTP POST? I know the "Get" way(windows.location), but in my ... param that should be passed to server See Question&Answers more detail:os...

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

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450 views

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java - import android packages cannot be resolved

My android application, built inside Eclipse, suddenly fails to build with dozens of errors. The most obvious are ... you can provide. Rich See Question&Answers more detail:os...

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

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298 views

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java - org.hibernate.ObjectNotFoundException: No row with the given identifier exists, but it DOES

I've got a hibernate problem that I can't fix. The setup: Java EE, web app, Hibernate 3.2, Tomcat 6, ... hib_session.close(); return SUCCESS; } 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 - Built-in string formatting vs string concatenation as logging parameter

I'm using SonarLint that shows me an issue in the following line. LOGGER.debug("Comparing objects: " + ... SonarLint is complaining about it See Question&Answers more detail:os...

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

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363 views

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java - how to define not mandatory property in spring?

I'm using spring 3 with PropertyPlaceholderConfigurator. My properties code looks like as following: ... annotation, configuration? See Question&Answers more detail:os...

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

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209 views

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java - Organization of JUnit tests in projects

What would you consider best practice for organizing JUnit tests in a project, and why? For example ... organization strategy entirely? See Question&Answers more detail:os...

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

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199 views

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java - Sorting Values of Set

I am trying to sort elements of a set but unable to do so far. here is my code which i am trying to do ... which they have been filled 12,15,5 See Question&Answers more detail:os...

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

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155 views

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java - MVC With Lazy Loading

Correct me if this is an exact duplicate, I know this topic is discussed often but can't find a definitive ... answer as it's so ubiquitous. See Question&Answers more detail:os...

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

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262 views

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java - What is the difference between "architecture-neutral" and "portable"?

I'm reading Herbert Schildt's book "Java: The Complete Reference" and there he writes that Java is portable ... understand it from the text. See Question&Answers more detail:os...

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

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223 views

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java - How inner class object resides in memory?

Outer outer = new Outer(); an Object of Outer class is created on heap and reference variable points to it. ... then impact the usage of inner. See Question&Answers more detail:os...

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

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217 views

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java - Shared Maven Repository across developers

Is there any way to avoid developers download all dependencies and have those dependencies located to shared locattion ... files and example? See Question&Answers more detail:os...

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

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187 views

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java - How much memory does a Hashtable use?

In Java, if I create a Hashtable<K, V> and put N elements in it, how much memory will it occupy? If it's ... , what would be a good "guess"? 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 - Decorating a JTextField with an image and hint

I'm trying to create some nicer looking JTextFields with an image and a hint. To do this I made a ... solve this without duplicating the code. See Question&Answers more detail:os...

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

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434 views

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java - wait.until(ExpectedConditions.visibilityOf Element1 OR Element2)

I want use wait.until(ExpectedConditions) with TWO elements. I am running a test, and I need WebDriver to ... up simultaneously) Please Help. 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 does volatile actually work?

Marking a variable as volatile in Java ensures that every thread sees the value that was last written to it ... the CPU cashes or something? See Question&Answers more detail:os...

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

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206 views

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java - Does JavaFX after removing it from jdk cross-platform?

Is JavaFX 11 cross-platform? As i saw in openjfx.org that i have to download releases for each platform. And ... > </dependency> </dependency> See Question&Answers more detail:os...

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

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286 views

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java - HPjmeter-like graphical tool to view -agentlib:hprof profiling output

What tools are available to view the output of the built-in JVM profiler? For example, I'm starting my JVM with ... ) this bug has been fixed. See Question&Answers more detail:os...

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

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