Recent questions tagged JAVA

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java - How to run a simple JUnit4 test in Android Studio 1.1?

I have an Android project that shows "Hello World". It was created from the "Blank Activity" template from ... : cannot find symbol class Test 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 - no declaration can be found for element 'mvc:annotation-driven'

I have the requirement of returning JSON/XML data from my controller.From what i found,I needed @ResponseBody in my ... 3.1.1 and @ResponseBody. 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 it possible to define a jax-rs service interface separated from its implementation (with eclipse and jersey)?

I don't know if the title is confusing, but let's say I have this interface: @Produces(MediaType. ... wrong annotations by any chance? 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 - XML dig sig error after upgrade to java7u25

I have a Java application for signing XML documents. After upgrading Java to the latest version (Java7u25) it ... API that causes this error? 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 run Eclipse without running JRE installation?

I wish to run Eclipse for C++ on Vista but I absolutely do not want to run the JRE installation. Is there ... Eclipse folder and have it 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 - Why does adding ".map(a -> a)" allow this to compile?

This is related to my answer to "stream reduction incompatible types". I don't know why what ... MethodType,MethodType,MethodHandle,MethodType) 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 use log4j with multiple classes?

I'm currently writing a big project in java, with numerous classes, some classes are quiet small, that ... independently with each 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 - Spring JPA no transaction is in progress

I am new to Spring and JPA, wasted 5 days and no result with searching internet. I want to save object to SQL SERVER, ... "> <map> <entry key="json" value="application/json" /&gt...

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

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java - Disable automatic layout change on Android

I've made an app, I've tested it and it was fine on my phone. But... when I gave the .apk to ... layout change which breaks my whole app design? 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 GC_FOR_ALLOC more "serious" when investigating memory usage?

I'm currently investigating garbage collection problems with my Android app, and I'm curious to know if GC_FOR_ALLOC ... for the GC messages? 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 externalize properties from JPAs persistence.xml?

I would like to put some of the hibernate configuration in a property file to make it editable ... org.hibernate.impl.SessionFactoryImpl) 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 is (javax.servlet.)SingleThreadModel deprecated?

Why is javax.servlet.SingleThreadModel deprecated? 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 join unrelated entities with the JPA Criteria API

Two database tables have a foreign key relationship. They are mapped to two entities A and B by JPA, but ... 'm afraid about possible overhead. 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 - Eclipse Deployment Assembly does not appear in properties

In a new project of mine I cannot see the Deployment Assembly link in the project properties. It is There ... </natures> </projectDescription> 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 - Glassfish server does not start. NullPointeException

I just downloaded the GlassFish 5.0 archive - Full Platform, unzipped it, I run it through the command line. asadmin ... help. What to do??? 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 - overridePendingTransition for sliding activities in and out smoothly

I'm having trouble figuring out how to slide activities in and out with a push of a button. What I want ... activity slide in from the right. 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 - Sign JAX-WS SOAP request

I would like to write a JAX-WS web service that signs my SOAP messages using the http://www.w3.org/TR/ ... how to update the SOAP request? 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 - Concurrent access to static methods

I have a static method with the following signature: public static List<ResultObjects> processRequest(RequestObject req){ ... after the other? 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 serialization works when only subclass implements serializable

Only subclass has implemented Serializable interface. import java.io.*; public class NewClass1{ private int i; NewClass1 ... please let me know. 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 - Return first non-null value

I have a number of functions: String first(){} String second(){} ... String default(){} Each can return a ... ? (besides doing a bunch of ifs) 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 set and check cookies wih JAX-RS?

I am a noobie with RESTful API and I am trying to build a Login service in which I provide an email and password ... I check the cookie(if set)? 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 - List an Array of Strings in alphabetical order

I have a program which has the user inputs a list of names. I have a switch case going to a function ... and java.util.Collections.sort(hotel); 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 - Mocked private method with PowerMock, but underlying method still gets called

I am trying to mock out a private method that is making a JNDI call. When that method gets called from a unit test ... .0, and PowerMock 1.4.10. 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 - Apache Commons DBCP connection object problem, Thread: ClassCastException in org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper

I am using Apache Commons DBCP (commons-dbcp.jar) Connection pool. Once I obtained a connection from the pool it ... or solution on the same. 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 set the button background image through code

I am using a Button created using following code LinearLayout ll = new LinearLayout(this); ll.setOrientation ... to the Button programmatically? See Question&Answers more detail:os...

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

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208 views

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java - Change the action bar settings icon color

How can one change the color of the overflow icon in the action bar? (The most right icon) 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 standard Sun javac do incremental compiling?

Recently I started to use Eclipse's java compiler, because it is significantly faster than standard javac. I was ... for my ant builds. 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 - SecureRandom: init once or every time it is needed?

Our team is using a SecureRandom to generate a list of key pairs (the SecureRandom is passed to a KeyPairGenerator ... it doesn't really matter. See Question&Answers more detail:os...

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

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