Recent questions tagged java

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java - Eclipse Lombok annotations not compiled... Why?

I have a problem with my project. It is an Spring CRUD RestFul API that expose services witch are providing ... about this kind of 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 - pass data to another fragment by swipe view with tab android studio,not button

Is it possible to pass a data from fragment to fragment by swipe? There are many articles teaching us how to ... button in the last fragment. 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's the proper way to handle JDBC connections with Spring and DBCP?

I'm using the Spring MVC to build a thin layer on top of a SQL Server database. When I began testing, it ... C3P0 considering it's kinda dead? 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 inject environment variable

In a Jenkins job I'm doing a couple of actions that reside in the pre-step build, such as executing a shell ... a pre-step into my Java 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 - How do I fix UnsupportedCharsetException in Eclipse Kepler/Luna with Jython/PyDev?

Example code: from java.lang import System if __name__ == '__main__': [System.out.print(x) for x in "Python ... , and the same thing happens. 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 - NullPointer in log during first connection to database

I get a NullPointerException on the console of my tomcat at my first connection to the database with ... )--initializing session manager 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 - Column name as a parameter to Spring Data JPA Query

Is there a way to inject an Entity property dynamically to @Query? My need is to implement a method like follows ... simple ways of doing 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 - Simplest Ivy code to programmatically retrieve dependency from Maven Central

I find the Ivy API to be immensely complicated. What is the simplest possible snippet to retrieve an artifact ... :jar into /my/destination. 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 - Override DropWizard ConstraintViolation message

So I want to change the validation messages used to validate a model through a DropWizard resource. I'm using java ... set in the annotation... 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 - Passing a space-separated System Property via a shell script doesn't work

I have this bash file: #/bin/bash PROP="-Dprop=foo bar" java $PROP -jar Foo.jar So, what I want ... space character but nothing seems to 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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java - Setting Djava.library.path programmatically (or alternatives)?

I am looking to set the VM argument Djava.library.path programmatically. If this can't be done, what are the alternatives (if there are any)? 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 - Single Instance of Activity

My application has three activities say A -> B-> C. Activity A is called from another activity through ... activity:launchMode as SingleTask). 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 - FTPClient corrupts the images while uploading to ftp server on android?

I'm trying to upload images to a FTP server (on my local PC) from Android Phone (HTC Desire HD). Images ... catch block e.printStackTrace(); } 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 - Portable Device Path on Windows

I've actually got an Windows/Java Question. I've got a plugged-in device which I want to access via Java ... feature? thanks for your help Ripei 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 - Public members in package private class

I wonder if it's okay (not considered bad practice) to have public members in package private class. I tend to ... classes in the 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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java - Double Buffering with awt

Is double buffering (in java) possible with awt? Currently, I'm aware that swing should not be used with awt, ... . Thanks for your time :) 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 the letter L in long variable declaration

long l2 = 32; When I use the above statement, I don't get an error (I did not used l at the end) ... l is not mandatory for long 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 - ClassNotFoundException with ServletContextlistener

I get an exception whenever I try getting context parameter from we.XML into a ServletContextListener class, I am ... breed; } } many 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 - Install xlsx and rJava on macOS Mavericks 10.9.5

Its being a real nightmare to install rjava on my Mac. My setup: MacOS 10.9.5 Java: 7u71 (64 bits dowloaded ... also got the same error. Ideias? 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 make the junit tests use the embedded mongoDB in a springboot application?

I am learning springboot and have created a simple springboot application. I want it to use the embedded mongoDB ... to an embedded Mongo? 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 convert UTF8 to Unicode

I try to convert a UTF8 string to a Java Unicode string. String question = request.getParameter("searchWord"); byte[] ... . Where do I go 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 - Duplicate local variable(For Loops)

I'm trying to solve an assignment (I'm still very new to Java) and have combed through many resources to ... mistake by declaring it before. 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 - android get screen size via C

i want to get screen size via c. i know that jni support calling java from c. but is there any person ... /graphics is related to my questions 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 when setting attribute?

For example I have a servlet code that sets attribute to a HttpServletRequest: request.setAttribute("someValue", ... doGet(SomeServlet.java:159) 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 - WSO2 ESB Unable to convert complete JSON data to XML

I am constructing a POC. And I created a pass through proxy service for Google Plus. Without using any proxy ... converts it into json data. 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 GetDirectBufferAddress from JNI

I am trying to understand how to use GetDirectBufferAddress from the JNI layer. To understand I've build a very ... the ByteBuffer usage in JNI? See Question&Answers more detail:os...

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

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211 views

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java - Two newly created objects seem to refer to the same address

I'm programming in Java for only a few months so I'm not that experienced with Java (some tricks and the basic ... this.numbers = numbers; } } 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 configure Tomcat to not encode the session id into the URL when HttpServletResponse.encodeURL() is invoked

Seems like a stupid question to which the answer would be "Don't use encodeURL()!" but I'm working ... an equivalent config option for Tomcat. See Question&Answers more detail:os...

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

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