包含标签：Java 的文章
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JavaFX real time linechart with timeline
I tried to draw a real-time graph with a timeline, but I found that the linechart constructor only has a signature Lin…… -
Java – I should test for situations where nothing happens
If the status is s or P, the sample can be deleted I have the following tests: @Test public void canBeDeletedWhenStatu…… -
Java – framework / design pattern for business rule validation
What framework / design pattern should I use to apply applications that may have more than biz rule validation? The ty…… -
Java – change the final variable through reflection. Why is there a difference between static and non static final variables
Please refer to the code below My question is why exceptions are not thrown in the case of non - static final variable…… -
Java – exception: mockito wants but is not called, but actually interacts with zero of this simulation
I have an interface Interface MyInterface { myMethodToBeVerified (String,String); } The implementation interface is …… -
Java – read date values from excel cells as strings
I use Apache POI library to read Excel files I got stuck reading the password unit If the user enters a date in the pa…… -
Java – why does atomicreference CAS return false with a value of 128?
I use atomicreference to implement atomicinteger However, in testing, I noticed that even in a single threaded environ…… -
What does the load () method of Java – hibernate do for non-existent IDS?
I'm interested in session JavaDocs on load is a little confused: I understand that I should use get, but what I don't …… -
Javafx-2, delete focus highlighting through CSS
I want to remove the blue border that overwrites the tableview when focusing I checked Caspian CSS, for most component…… -
Java – what is the best server client communication protocol used in Android and IOS?
We have a server application (implemented in Java) that will provide some data for our mobile application Apps will be…… -
Java – jar: accessing external configuration files
I'm looking for something that I don't think will be difficult I have an application. I want to package it into a jar.…… -
Java – a tricky static generic method with a generic return type, which itself can be generic
I have a course as follows: public class MyConverter { public <T> T convert (Object o,String typeidentifier,…… -
Strictfp in Java
I have implemented some neural network libraries in Java, and there are tight double (not double) matrix operations. T…… -
How to convert jdbc4connection to pgconnection?
I want to use Postgres copymanager: CopyManager cp = ((PGConnection) dataSource.getConnection()).getCopyAPI(); Because…… -
Is there a map with variable key length in the Java world?
I need a map, but when I call get (key, n), it should not only return all records with search key values, but also ret…… -
Java – groupingby with collectingandthen – is there a faster / better / cleaner way?
I have the following courses (getters): public class AlgorithmPrediction { private final String algorithmName; …… -
Java – cannot work with Jackson
I wonder why there is no definite way to work with Jackson I just want to parse JSON strings: ObjectMapper mapper = ne…… -
Java – gradle output jar does not have a main class
I have the following simple build Gradle file: apply plugin: 'application' apply plugin: 'java' mainClassName = 'com.…… -
Java – joda time dateformatter displays milliseconds if non-zero
With joda time, I want to display a list of dates that may or may not have milliseconds If an entry has milliseconds, …… -
How to query the M: n relationship with JPA2?
I have an object (blogpost), which contains a collection of M: n elements (tags) How to query an object (blogpost), in…… -
Grails – how do I maintain the order of keys in a Java properties file?
I have groovy code to read the properties file, change the value, and then write it to the same file def props = new P…… -
Is it safe to capture stackoverflowerror in Java?
I have two different function implementations (for example, tree size), one recursive and the other explicit stack Rec…… -
Java – how to upload files on the server folder using JSP
There is already an answer to this question: > recommended way to save uploaded files in a servlet application2 Her…… -
Is it still relevant to replace enumeration structures with classes in Java?
I'm reading the effective java written by Joshua Bloch in 2008. A hint is to replace enumeration structures with class…… -
Java – the portlet URL opens another portlet in a pop-up window
I have a create_ account. JSP hook The question is: how do I provide a portlet URL? How do I access it? In this portle…… -
Java – defines a global uncaughtexceptionhandler for all threads of the application
I want to define an application level uncaughtexceptionhandler in my java application. If an uncaught exception is thr…… -
Extract from strings in Java
I have a string; String value = "(5+5) + ((5+8 + (85*4))+524)"; How to split / extract the logical value from this str…… -
Java – reads and stores the contents of the file as a double array
I need to write a program to read and store input files with double arrays in Java The number of values in the file is…… -
Java – jetty: stopping programmatically causes “1 thread cannot be stopped”
I have an embedded jetty 6.1 26 examples @Override protected void doGet(HttpServletRequest req,HttpServletResponse res…… -
Java – JPA: @ embeddable object how to get a reference to its owner?
I have a user class, @ embedded a profile class How to give an instance of a profile a user class reference to its own…… -
Java – hibernate exception: unknown name value of enumeration class
When I try to retrieve a record from the DB, I get the unknown name value of the enumeration class Using JSF 2.0, JPA …… -
Java mapping concurrent update
I'm trying to create a map with int value and increase them through multiple threads Two or more threads may add the s……