Recent questions tagged Java

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java - Using MatrixCursor and SimpleCursorAdapter in a ListView with text and images

I'm having an issue using a MatrixCursor to populate my ListView: private void fillData() { String[] menuCols = ... is in my answer below. 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 it is implied that objects are equal if compareTo() returns 0?

Let's have a class Person. Person has a name and height. Equals and hashCode() takes into account only name. Person ... have idea why it is so? 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 do I get org.hibernate.HibernateException: No CurrentSessionContext configured

I'm writing a simple project, a business app written in Swing, using Hibernate for back-end. I come ... -factory> </hibernate-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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java - Spring Security: enable / disable CSRF by client type (browser / non-browser )

Spring Security documentation says: "When you use CSRF protection? Our recommendation is to use CSRF protection for ... certain type of clients? 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 - JTable: Detect cell data change

In Netbeans, I used the GUI Builder to insert a JTable into my application. I have just one class (CustomerDB) ... you very much 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 - Change field case with an ObjectMapper

I think I need to create a specialist ObjectMapper and cannot find any sample code to start the process. The ... be done with an ObjectMapper? 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 - Error resolving "onAction" while loading FXML

I'm having some issues getting a simple hello world application to run. It is throwing the following error: ... is my first time posting. 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 get JobParameter and JobExecutionContext in the ItemWriter?

I want to retrieve JobParameter and JobExecutionContext object in my ItemWriter class. How to proceed? I tried ... . 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 to serialize Optional<T> classes with Gson?

I have an object with the following attributes. private final String messageBundle; private final List<String> ... underlying Optional content. 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 instance variable and method having same name

In java can an instance variable and a method have the same name without any instability or conflict? I want to ... any error down the road. 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 - Which JCE providers are FIPS 140-2 compliant?

What Java Cryptography Extension (JCE) providers are FIPS 140-2 compliant? More specifically, does the Sun/Oracle provider qualify? 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 vs Annotations

I have an app that uses ActiveAndroid, a database ORM library, that relies on annotations. @Table( ... Column -keepattributes Table 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 - Concatenating two int[]

There are easy solutions for concatenating two String[] or Integer[] in java by Streams. Since int[] is frequently ... ] back to int[] again. 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 - table column won't take full size of the table view in javaFX

i am trying to create a table with two columns. i am using the scene builder included in netbeans 7.2. in all ... prefHeight="30.0" vgrow="SOMETIMES" /> <RowConstraints minHeight=...

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

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java - What is the difference between Collection<?> and Collection<T>

I am mainly a C# developer and I was teaching Data Structures to my friend and they use Java in ... /tutorial/extra/generics/wildcards.html 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 not accessible in current context

I have the following code public abstract class BaseAdapter<T, V extends BaseAdapter.ViewHolder> extends ... clarify this situation? 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 generate a PDF from JavaDoc (including overview and package summaries)

I have written extensive JavaDoc documentation on my application, and added lots of useful info at overview.html ... the JavaDoc-generated HTML? 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 won't keep a class member's enums

I'm working on a library that is distributed as a java jar, and I'm running proguard on it in such a ... .MyEnum'" Thanks for the 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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919 views

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java - JSON parse error: Can not construct instance of io.starter.topic.Topic

Im learning Spring Boot and I made a demo but when I POST a request to add a Object it didn't work! The error ... "desc": "T3" } 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 - ivysettings.xml: add local maven path

How to add a local path (not URL) to ivysettings.xml? I need to add my Maven local repository (/Users/me/.m2/repository to it. 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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317 views

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java - What is the proper way to close H2?

This is related to this post. I think I am having problem with H2 meaning that it does not close ... /FileWatchdog.run(FileWatchdog.java:104) See Question&Answers more detail:os...

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

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530 views

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java - Running ProGuard on OS X: Where is Apple's equivalent to the rt.jar?

I'm running ProGuard to shrink my jar file. One of the parameters it needs is the system's runtime jar. This is at ... there an rt.jar for OS X? 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 are the differences between 'Selenium-server-standalone.jar' and 'Selenium Client & WebDriver'?

What are the Implementations differences between 'Selenium-server-standalone.jar' and 'Selenium Client & WebDriver'. ... could pls help /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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315 views

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java - Do unused local variables in a method acquire memory in JVM?

I came across this post in SO Do uninitialized primitive instance variables use memory? It states "In Java, ... evidences which supports 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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356 views

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java - Maven terms -- dependency and plugin, repository vs. pluginRepository

I've been working with Maven for days but still get confused about some of the terms: First question is what is ... Please give a hint, 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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421 views

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java - Is there any reason EnumMap and EnumSet are not Navigable

Enum is Comparable which means you can have NavigableSet<AccessMode> modes = new TreeSet<>(); NavigableMap< ... Am I missing 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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355 views

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java - What is retained size for an object on heapdump?

I've recently increase my use of the Profiler in Netbeans (6.7), this is a great tool. I have a question ... is it used to analyze memory usage? See Question&Answers more detail:os...

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

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540 views

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java - Twitter4j: Get list of replies for a certain tweet

Is it possible to get a list of tweets that reply to a tweet (or to its replies) using twitter4j? The ... and Android app have this feature. See Question&Answers more detail:os...

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

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