包含标签：Java 的文章
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Java – how to change property values at run time in spring
I need to change properties in the application at run time My properties file has hours.expired=12 My service private …… -
. Net – does the StringBuilder initialized with a string contain the exact (only) space for the string?
I wonder if this code StringBuilder sb = new StringBuilder("Please read the following messages."); ... initialize sb w…… -
Java – use hibernate JPA to store objects in columns
Can I store things like the following that use only one table? Now, what hibernate will do is to create two tables, on…… -
Java – customize webargumentresolver, such as @ pathvariable
I want to use a custom webargumentresolver as the ID – > entity If I use the request parameter, it is simple enough…… -
How to provide preprocessing instructions in Java
There is already an answer to this question: > how to mark java code such that it's not compiled [C#] #define PRODU…… -
Java – why can I set – Xmx to a value greater than physical and virtual memory on windows and Solaris?
On a 64 bit windows machine (each task manager) with 12gb ram and 33gb virtual memory, I was able to run Java (1.6.0_0…… -
Java – find duplicate entries in the collection
Is there a tool or library that can find duplicate entries in the collection according to specific standards that can …… -
Threads in Java threads?
I am currently considering how to design a multithreaded system in Java that needs a lot of network processing and dat…… -
How to create blob objects in Java?
1. How to create blob objects in Java? I have created a blob object byte [] fileId=b.toByteArray(); Blob blob=new …… -
It’s a ‘. ” Member access is considered an operator in Java?
In Java, I can access public members of a class You can see in the second line of the main method of the following exa…… -
Java – IntelliJ and Maven source folder issues
I tried to create a simple java webapp using IntelliJ (v11.1.3) and integrate it with a simple Maven POM file to downl…… -
Java – the difference between opencv and OpenCL
Anyone can explain the difference between opencv and OpenCL? What is suitable for Android image processing in Java? So…… -
How to set tab order in swing Java?
I want to know how to adjust the Tab order in the Swing interface. I found an example that shows the trick this method…… -
Java – regular expressions extract text in reverse order up to the third character instance
I have a format of XXXX_ YYYY_ YYYYYYY_ String of yyyyyzzz How to extract a string from the back until it hits thrid_ …… -
Java – should I use mod or remainder when checking the separability of BigInteger?
When a BigInteger B checks the divisibility of BigInteger a, I can write a. mod (b) Equals (BigInteger. Zero) or A. ho…… -
How to set up multiple items in JList using setselectedvalue?
I have a JList that is dynamically populated by adding to the underlying listmodel Now, if I have three strings, I kno…… -
Java – how does CompareTo work?
I know CompareTo returns negative or positive results related to one string and another, but why: public class Test { …… -
In Java, the playback framework handles and blocks I / O asynchronously
My application uses the play framework to handle rest requests I need to perform some potentially persistent blocking …… -
What are the benefits of Java EE – jrebel?
I've been checking jrebel According to their website: This seems to be the same as what eclipse, NetBeans and IntelliJ…… -
Java – project $$enhancerbycglib $$67a694bd appears in Hibernate
I have a document entity mapped many - to - one to the project entity When I call document During getproject, in the d…… -
cmd. exe powershell HashTable
Using CMD When exe is called, is there a method in the power shell that can pass hashtable as a parameter? I want to c…… -
How do I extend the test timeout in circleci?
I run some tests in circleci, some tests take longer, and then 10 minutes, because its UI tests run on headless browse…… -
Java 8 – ternary operator return function not compiled
Can anyone tell me why not compile? public class TestClass { private boolean doThis = false; protected void …… -
Java – Hibernate: standards and collections
I have a question about hibernate and criteria I have two classes: public class Place{ long id; String name; …… -
Java – stackoverflowerror when calling recursively
The problem is a strict theory, but I can't find the answer Consider this short procedure: public class SBtst { i…… -
Java – cross reference and garbage collection
There is an extensive object graph application The graph mainly consists of a set of subgraphs connected to the rest o…… -
Java – spring security configuration error: beans have the same ‘order’ value
I have a web application in which I implement spring security, my spring security XML is <?xml version="1.0" encodi…… -
Java – JSP El: dynamically create attribute names
See the English answer > how to get value of bean property when property name itself is a dynamic variable1 I have …… -
Java – make Jfilechooser display image thumbnail
I want to create a Jfilechooser with a thumbnail view of the image file So I subclass fileview and zoom in the method …… -
What is the reason for this strange Java behavior?
I want to test the '= =' operator on long. This is what I found: the following code: public static void main(final Str…… -
Java – how to set the direction of jtextarea from right to left (in joptionpane)
I have JScrollPane and jtextarea. I try to set the direction of jtextarea from right to left, so the text will start f…… -
Manage java version compatibility
I read "jdks are generally forward compatible, and jres are generally backward compatible" What version checks do java……