Java 归档 - Page 348 of 655

Java – anyone can explain tools to me The functionality of jar (which is tied to the JDK / lib folder) and why does it need it?

I'm in Java Encountered tools in so Jar file, want to know what it is used for? I searched a lot, but I couldn't find ……

Java

2020-01-23

Java – a schema that uses JDBC to connect to different databases

I am writing an application that must be configurable to connect to Oracle, SQL server and MySQL according to the idea……

Java

2020-01-23

Java – create Maven project, unable to parse prototype, reject connection

I suspect I have Maven agency problems When I create a new project: 1) File – > New – > Maven project 2) I choos……

Java

2020-01-23

Java – when the difference between methods is a parameter subtype, null is passed to the overriding method

See English answer > which overload will get selected for null in Java? 3 Why does the virtual machine call this me……

Java

2020-01-23

Generate UML from Java source

Because I have a big project, I have to generate UML for it Writing UML for 300 classes is excessive So is there any s……

Java

2020-01-23

Java – exception thrown when connecting to JMX server in spring!

So when I try to connect to JMX from jconsole, I get this exception: Caused by: java.rmi.ConnectException: Connection ……

Java

2020-01-23

Java – in memory scanning of files, ideally using ClamAV

We are implementing an enterprise application that focuses on security, including uploading files These files need vir……

Java

2020-01-23

Java – WebSockets with multiple data in onmessage annotation

I'm using WebSockets I want to use multiple @ onmessage overloaded methods with different data types @OnMessage public……

Java

2020-01-23

Java scriptengine: use values on the Java side?

In the Java program, I am calling a user-defined JavaScript program: File userJSFile=...; javax.script.ScriptEngineMan……

Java

2020-01-23

Java – spring security displays “bad credentials” even before submitting the form

I have the following spring safety code, but it doesn't work When I open the login page and enter the user name / pass……

Java

2020-01-23

Java – how to terminate matcher Find() when it runs too long?

I want to know the technology of terminating long-running regular expression matching (Java matcher. Find () method) M……

Java

2020-01-23

Java – add jdbc driver to classpath

OK, I set up my Maven correctly on win vista_ HOME,JAVA_ HOME. But I don't have a course path yet I also installed mys……

Java

2020-01-23

Java compiler of JDK 1.6: how to write class bytes directly into byte [] array?

So I recently learned about the new Java compiler API provided in JDK 1.6 This allows string to be compiled directly f……

Java

2020-01-23

Java – getting, (#803) there is no error in some aliases you requested

When I try to get data from Facebook using the graphics API, I get this error, {"error": {"message":"(#803) Some of th……

Java

2020-01-23

Java – libgdx: how to animate on an isometric tile map?

I have some questions about libgdx and Pingpu map I can use isometric tiled maprenderer as a renderer and orthographic……

Java

2020-01-23

Java – bit strings: check whether one bitstring is a subset of another

I represent this group of English letters as a 26 bit string The first bit corresponds to 'a', the setting bit corresp……

Java

2020-01-23

Java – how do I check if a byte array is empty?

I am using the following code to get the uploaded file @POST @Path("update") @Consumes(MediaType.WILDCARD) ……

Java

2020-01-23

Java – how to ignore attributes with null values during deserialization from JSON

I am trying to deserialize a JSON string into a concurrenthashmap object, and I receive an error because my JSON conta……

Java

2020-01-23

Random enumeration of hash tables in Ocaml

Sorry, it's a long question I decided to explain the background of the problem first, because my problem may have othe……

Java

2020-01-23

Java – can regular expressions be used for jetty’s servlet mapping?

I have this mapping <servlet-mapping> <servlet-name>service</servlet-name> <url-pattern>/servi……

Java

2020-01-23

How to use the system Use multiple scanner objects on in?

What is the correct way to use multiple scanner objects in my program For example, I use a scanner to read a file, and……

Java

2020-01-23

What is the most valuable Java object database?

The most valuable Java object databases are: >Easy to use: one line of code stores any object. > Effective memor……

Java

2020-01-23

Java – the eclipse debugger “skips” important code

I have a strange problem debugging Android applications // Get the puzzles from cache List<PuzzleDetails> newPuz……

Java

2020-01-23

Java – activate SQL statements using hibernate and spring data JPA

I have a spring data JPA repository that uses hibernate as a provider I want to record SQL statements, but I can't I'v……

Java

2020-01-23

Java implementation of intervaltree deletenode

I need an intervaltree or rangetree implementation in Java and can't find an implementation with work deletion support……

Java

2020-01-22

Java – does AspectJ not capture all events in the spring framework?

My project is based on spring framework 2.5 4. I try to add aspects to some controllers (I use AspectJ 1.5.3) I'm at a……

Java

2020-01-22

Java – unable to understand class objects

The Oracle Java documentation on internal locks and synchronization says: I don't fully understand the concept of clas……

Java

2020-01-22

How do I store and reuse key pairs in Java?

I want to generate the key pair once and reuse it public static KeyPair generateKeyPair() throws Exception { K……

Java

2020-01-22

Java – how to use a custom runner when using categories in JUnit?

I have a bunch of JUnit tests that extend my basic test class basetest, which in turn extends assert Some of my tests ……

Java

2020-01-22

Java – in IntelliJ, why should I clean up and build wars to see changes when I run Google App Engine locally?

I'm using the Google application engine to build wars, and I notice that whenever I make local changes, I don't apply ……

Java

2020-01-22

Java – spring boot jsr-303 / 349 configuration

In my spring boot 1.5 In the application, I am trying to configure support for JSR - 303 / JSR - 349 authentication I ……

Java

2020-01-22

Java – spring utilities cannot be resolved

I'm trying to use one of the Oracle GUI examples of spring utilities But eclipse gave me errors and could not resolve ……

Java

2020-01-22

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Java – anyone can explain tools to me The functionality of jar (which is tied to the JDK / lib folder) and why does it need it?

Java – a schema that uses JDBC to connect to different databases

Java – create Maven project, unable to parse prototype, reject connection

Java – when the difference between methods is a parameter subtype, null is passed to the overriding method

Generate UML from Java source

Java – exception thrown when connecting to JMX server in spring!

Java – in memory scanning of files, ideally using ClamAV

Java – WebSockets with multiple data in onmessage annotation

Java scriptengine: use values on the Java side?

Java – spring security displays “bad credentials” even before submitting the form

Java – how to terminate matcher Find() when it runs too long?

Java – add jdbc driver to classpath

Java compiler of JDK 1.6: how to write class bytes directly into byte [] array?

Java – getting, (#803) there is no error in some aliases you requested

Java – libgdx: how to animate on an isometric tile map?

Java – bit strings: check whether one bitstring is a subset of another

Java – how do I check if a byte array is empty?

Java – how to ignore attributes with null values during deserialization from JSON

Random enumeration of hash tables in Ocaml

Java – can regular expressions be used for jetty’s servlet mapping?

How to use the system Use multiple scanner objects on in?

What is the most valuable Java object database?

Java – the eclipse debugger “skips” important code

Java – activate SQL statements using hibernate and spring data JPA

Java implementation of intervaltree deletenode

Java – does AspectJ not capture all events in the spring framework?

Java – unable to understand class objects

How do I store and reuse key pairs in Java?

Java – how to use a custom runner when using categories in JUnit?

Java – in IntelliJ, why should I clean up and build wars to see changes when I run Google App Engine locally?

Java – spring boot jsr-303 / 349 configuration

Java – spring utilities cannot be resolved

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