Recent Posts
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Java – check for link corruption
I try to use java to find all broken links in web pages This is the code: private static boolean isLive(String link){ …… -
Java compatible cksum functionality
Is there any library / code in Java that computes the 32-bit CRC of the byte stream in a manner consistent with the ck…… -
Java – a strange way to pass parameters to methods
I was browsing the Java API code for exchange web services and saw the design choices of the methods developers passed…… -
Handling large string lists in Java
I have a task that I have to pass billions of strings and check whether each is unique All lines themselves cannot be …… -
How complex is the BigInteger operation in Java 7?
How complex, split and consumed are the methods in BigInteger at present? There is no mention of computational complex…… -
Java – create JSF view / component tree from XHTML file
I need to access the JSF page component tree when the application starts I found this source on the Internet UIViewRoo…… -
Java – default value of local variable?
See the English answer > default values of instance variables and local variables Who can explain? Solution Local v…… -
Autocomplete using Emacs 24 does not apply to Java, C, or C mode
I used marmalade buy back to install autocomplete Everything was installed correctly, and after moving something, I ma…… -
Java – classnotfound error when running storm starter topology in local mode (win10, OS X)
I tried to debug storm topology (on storm V 1.0.0) under windows in the following ways: TopologyBuilder builder = new …… -
Java – preload WebView in activity a and pass it to activity B to speed up loading
In one of my applications, I use WebView to load the page. The scenario is that I have activity a and activity B. acti…… -
Java – hibernate only updates some fields
In some cases, I want to update only one column, but I don't want to get the object from the database. I only have its…… -
Java – regular expressions ignore new lines and match only the entire large string?
I have this string here: CREATE UNIQUE INDEX index555 ON SOME_TABLE ( SOME_PK ASC ); I want to match mult…… -
Java – drawerlayout on the actionbar
When using drawer layout, is there any way to overlay the drawer view on the operation bar? I don't want to hide the a…… -
Should variables always be declared using interfaces in Java?
People often see the suggestion that variables should be declared with an interface rather than implementing a class F…… -
Java – maven – cannot activate a configuration file in a multi module project
I have encountered some difficulties in configuring our project with Maven and need some help:) For example, I have a …… -
Java – how to avoid resetting fileuploadfield at the end of a request in wicket
I have a wicket form with fileuploadfield and more text fields Verification of correctness fails when required fields …… -
Minimize application data memory overhead in Java processes
I need to store a lot of data (objects) in memory (for calculation) I just want to know if there are any libraries for…… -
Java – how to ensure FIFO execution order in ThreadPoolExecutor
I use this line of code to create a ThreadPoolExecutor: private ExecutorService executor = new ThreadPoolExecutor(5,10…… -
Java – override constructor
I'm very confused about overriding constructors The constructor can't be overridden is the result I got when I searche…… -
Java standard for client / server communication
What is the "official" Java API for client / server or P2P communication? Java RMI？ Other network APIs?? Is this offi…… -
Filesystems – what file system operations need to be atomic?
Are unlink, fsync, and rename the only atoms by definition? Edit: atom means that the operation is successful and effe…… -
Java – how mockito creates instances of mock objects
When I create a mock object of class employee It does not call the constructor of the employee object I know that inte…… -
Java – Tomcat 6 does not load jars from WEB-INF / lib
I'm trying to track configuration issues in my Tomcat environment Our production server is running a Tomcat installati…… -
Java – securitymanager for cloud service “sandbox”
All, I am designing a cloud based service that will provide the option to execute some "plug-in" code submitted by cus…… -
Threadsafe singleton has no Java synchronization?
I have a multithreaded application and a singleton class: public final class Singleton { private static MyClass m…… -
Java – spring boot: handle multiple requests at the same time
I use spring boot to build a restful web service My IDE is eclipse oxygen I send HTTP get requests every 2 seconds thr…… -
Add Java 9 system module and compile in eclipse
I have some legacy java code, namely: package org.alo.test.j9; import javax.activation.DataHandler; // in java.activ…… -
java – Random. Problems with nextgaussian()
Random. Nextgaussian () should give a random number no.s, with a mean of 0 and an STD deviation of 1.0 Solution A Gaus…… -
How to modify the month value of dateformatsymbols
I'm trying to add a specific month name for a specific locale For example, the code is generated in January, February,…… -
Java – use the domain alias account in appengine to send e-mail
I created an App Engine Application owned by x@foo.com. Foo. COM is a Google App account I've also added bar to the Go…… -
Entity Framework – Entity Framework optimistic concurrency exception
Should I maintain the timestamp property on my model class to enable optimistic concurrency for data updates and delet…… -
Java – use ant to execute absolute paths instead of relative paths
My ant script has the following code snippet It works well: <exec executable="C:\test\foo\programName.exe" /> Bu……