Java
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How to clear HTTP from Java?
I am trying to perform purge using httpurlconnection as follows: private void callVarnish(URL url) { HttpURLConnec…… -
When compiling java with different versions of JDK, the same target and source versions are guaranteed to perform the same operation?
We will update our CI system from Java 7 creation to Java 8 After that, we want to migrate the projects to Java 8.0 on…… -
Java – how to improve the reliability of e-mail sending and delivery?
Current applications use simple java mail to send several emails a day, but some emails will never be sent to the clie…… -
Java – slf4j log4j recorder does not record
I want to use slf4j-log4j for the first time In each Java class, I define such a recorder: private org.slf4j.Logger lo…… -
java – React Native,Android Log.
Is there any way to see logs from Android's native (Java) modules on the machine? I am using the Javas log module http…… -
Java adds text to a specific line in a file
I wonder if I can add a line to a file with Java For example, myfile: 1: line 1 2: line 2 3: line 3 4: line 4 I want t…… -
Why is line 17 of this Java program not executed?
As an exercise in my java course at uni this morning, I had to write a small program to ask users to enter some detail…… -
JMeter slave – server failed to start: Java rmi. RemoteException: cannot start Ip-10-142-111-66 is a loopback address
I created a quasi system EC2 Ubuntu server and only used hte to install JMeter to follow sudo apt-get install jmeter T…… -
Java – illegalargumentexception: the name of the executable file has embedded references and split parameters
I received an error: IllegalArgumentException : Executable name has embedded quote,split the arguments Runtime Runtime…… -
Redirect Java – version to a file or variable
This may be a stupid question, but I tried to redirect the exit of the "Java - version" command to a file or variable,…… -
Java – length in array and length () in string
When we talk about arrays and length (), why is the length of data fields when we talk about strings in Java? Means: i…… -
Java – why doesn’t this code cause concurrentmodificationexception?
I'm reading about concurrentmodificationexception and how to avoid it Found an article The code for the first list in …… -
Asynchronous – rxjava adds items after creating observable
I just started using RX Java and I got stuck Maybe I don't use rxjava in the right way, but I need to add it to observ…… -
Java – selenium. In selenium webdriver What is the equivalent of waitforpagetoload (“30000”)?
The following is the Java code waiting for the page to load in selenium RC: selenium.waitForPageToLoad("30000"); What …… -
Java – App Engine blobstore – what can I do to limit the size of files that users can upload?
What can I do to limit the size of files that can be uploaded? I know I can use swfupload to limit its client, but how…… -
Java – what is a better way to keep the adapter as an active internal class or external class?
I want to check for a better and faster way to use the listview program with the adapter Is it out or activity class? …… -
Java – create meta-inf / services folder in eclipse
I tried to create an extensible application in Java and chose to use SPI According to this tutorial, I'm paying attent…… -
Java – how to delete / filter / ignore certain packages from Emma (code coverage)
I tried to delete some packages from my report and got into trouble Can someone help me? I use Emma in my ant process …… -
Java – why not more boring GC
Except Azul, all GCS I know are concurrent, but at least there are some small worldwide components Why isn't there mor…… -
How to call collections on a part of a Java array Shuffle
So I have the following array: String [] randomList = new String [16]; randomList[0]="Dog"; randomList[1]="Dog…… -
Java – JPA many to many connection table entity, compound key “null ID generated”
This is my entity: public class Account extends AbstractEntity<Long> { @Id @SequenceGenerator(name = "a…… -
Java – use the properties in the properties file
I apologize for the title I can't find a better way to explain the situation I use the property class to load property…… -
Java – the same string comparison gives me false
See English answers > How do I compare strings in Java? 23 String temp = ""+(num1*num2); Boolean equal = temp == an…… -
Why do you have to deal with () an out of range Java awt. Window？
One of the memory leaks I found in my application was Java awt. Window. All windows specific static field that tracks …… -
Java – Eclipse: import and export operations in the “save operation” option
You can import export cleanup settings as XML files in preferences - > java - > code style - > clean up I wan…… -
Properties in Java – can we use comma separated keys for individual values?
I want to provide multiple keys (> 1) for a single value in the properties file of my java application A simple way…… -
Java – how do I check if a string is a valid XML element name?
You know the functions in Java, which will verify that a string is a good XML element name Form W3Schools: I found tha…… -
Predicate based method of Java 8 stream indexof
See English answers > stream way to get index of first element matching Boolean int index = list.stream().indexOf(e…… -
java – Selenium – driver. Getpagesource () is different from the source viewed from the browser
I tried to use selenium to capture the source code from the specified HTML file, but I don't know why. I didn't get th…… -
Java – simple XML parsing from XML to list
I use simple XML (simple-xml-2.6.2. Jar) to parse XML files, such as: <?xml version="1.0" encoding="UTF-8" ?> &…… -
Open source Java reporting framework
I want to create several reports and select data from several SQL tables, so I don't create different reports. I want …… -
Java – use the properties in the properties file
I apologize for the title I can't find a better way to explain the situation I use the property class to load property……