Recent questions tagged Java

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java - Spring boot could not resolve placeholder in string

I am running spring-boot on an embedded tomcat server through maven with mvn clean install spring-boot:run. But ... in advance for your 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 - Using ProGuard with Android

I have problems dealing with ProGuard and Android. I searched on the web for hours and found multiple ways to ... the libs folder of my project 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 does Hibernate query have compile error in IntelliJ?

I have this Hibernate code: Query q = session.createQuery("from MyTable where status = :status"); It compiles ... Why is IntelliJ complaining?? 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 I make the JVM exit on ANY OutOfMemoryException even when bad people try to catch it

An OOME is of the class of errors which generally you shouldn't recover from. But if it is buried in a ... access to modify the source 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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java - Understanding mysterious Oracle JDBC errors - ORA-00911: invalid character

I am making Java 1.6-JDBC-Oracle 11 code. I created a table called employee with id,name and age. I am ... line of code caused the exception. 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 register ServletContextListener in spring boot

Hello I'm trying to rewrite my old code to use Spring Boot. I have one listener public class ... contextInitialized method is not called. 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 - Jenkins, specifying JAVA_HOME

I installed openjdk-6-jdk on my ubuntu box using apt-get. In system info jenkins is telling me Java.Home ... Am I missing something obvious ? 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 - ConcurrentModificationException when using stream with Maps key set

I want to remove all items from someMap which keys are not present in someList. Take a look into my code: ... most elegant way 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 - NoSuchMethodError: org.slf4j.impl.StaticLoggerBinder.getSingleton()

The issue was caused by one of the dependencies in my pom.xml [cxf-bundle-jaxrs] which internally uses lower ... by googling, but no luck. 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 - A JTA EntityManager cannot use getTransaction()

How can I use the following code in my non-ejb application. The code works. @Override public void saveItems( ... . The question is how? 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 - Using Socket.IO on android Always Returns XHR Poll Error

I am writing an android app that needs to connect to a Socket.IO instance running on a node.js server. Attempting ... know and I'll add 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 - Clicking on notification doesn't open mentioned activity

I am trying to open an Activity when the notification is clicked and below is my code. Intent intent = new ... app is not already opened state. 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 - Cure for 'The string "--" is not permitted within comments.' exception?

I'm using Java 6. I have this dependency in my pom ... <dependency> <groupId>xerces</groupId> <artifactId> ... of the term "well-formed." 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, abstract class and annotations

I've got a pretty simple abstract class public abstract class AbstractServiceActions { @Autowired protected DatabaseModel ... impossible here? 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 - Protect string constant against reverse-engineering

I have android application that has hard coded (static string constants) credentials (user/pass) for sending emails via ... them in my classes? 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 - 2 JPA entities on the same table

Let's say I've a table with 200 columns and most of them are never used. I map SmallEntity to the ... checking and entity lifecycle in general? 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 - Room Persistence Library run time exception when calling Rooms inMemoryBuilder method

When following the tutorial for setting up the Room persistence library I run in to this error when testing on an Android ... :1.0.0-alpha1" } 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 - JDBC ResultSet getDate losing precision

I am losing precision in my ResultSet.getDate(x) calls. Basically: rs = ps.executeQuery(); rs.getDate(" ... to redefine the entire 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 - File separators of Path name of ZipEntry?

ZIP entries store the full path name of the entry because (I'm sure of the next part) the ZIP archive is ... correct answer had to be updated 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 - NullPointerException on list.add

I am getting a NullPointerException at the modelData.add(i, es) method. I know from debugging that es isn't null. I' ... .SEVERE, null, ex); } } 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: must implement OnFragmentInteractionListener

It's trowing an error saying I must implment the OnFragmentInteractionListener, but as far as I'm aware I' ... .main(ZygoteInit.java:694) 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 - Horizontal scroll on textview on android?

I'm working on a calculator. I noticed that in the default android calc you can scroll the textview horizontally. I ... . What am I doing wrong? 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 quickly check if URL server is available

I have a URL in the form http://www.mywebsite.com/util/conv?a=1&from=%s&to=%s And want to check if it ... ; like in the sample nothing changes. 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 can I convert an Icon to an Image

I'm trying to convert an Icon (javax.swing.Icon) to an Image (java.awt.Image) using this code: private Image ... my post to add them. 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 - An Errors/BindingResult argument is expected to be declared immediately after the model attribute, the @RequestBody or the @RequestPart arguments

I am teaching myself Spring by dissecting example applications and then adding code here and there to test theories ... I am not understanding? 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 password encryption Jenkins is using?

I am modifying an xml of a Jenkins job. There is a field which is a password. When I get the xml, ... configuration it has a password field. 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 @Inject be made optional in JSR 330 (like @Autowire(required=false)?

Spring's @Autowire can be configured such that Spring will not throw an error if no matching autowire ... documentation to that extent. 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 - Sort an ArrayList by primitive boolean type

I want to sort my ArrayList using a boolean type. Basically i want to show entries with true first. Here ... true true false false false false See Question&Answers more detail:os...

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

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