包含标签：Java 的文章
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Java – C: why objects are passed by value
In Java, all variables containing the appropriate object are actually references (i.e. pointers) Therefore, method cal…… -
Java – how do I evaluate this equation?
I think it's very self explanatory in the code Obviously, I don't evaluate the same thing over and over again, it's ju…… -
Java – should I use dependency injection for good design and testable code?
I have a class representing images: it's called photography The constructor is as follows: Photography::Photography(QS…… -
When a runtimeException is thrown, Java expects the return value
Why doesn't this compile (try Java 8 and Java 10)? It generates a missing return statement error public class Compiler…… -
Java – error compiling Maven selenium project – compilation error package not found
I tried to run the Maven project of selenium test (Maven - install) Below is POM <project xmlns="http://maven.apach…… -
Java – deploy / host spring boot applications
I recently completed a simple spring launch application using the IntelliJ ide The application runs locally as a sprin…… -
How to send objects to socket arrays in Java
Example: ArrayList arraySocket=new ArrayList(); ... arraySocket.add(client); ... for (Object arraySocket1 : arraySocke…… -
Java – get the latest application version from Google playstore when multiple apks are uploaded
I uploaded multiple apks for my app on playstore to support it on all devices The problem now is that when I use the f…… -
Java – relative file path with “user. Dir” system attribute
I'm trying to read a local file in a web application on the server When testing JBoss outside deployment, the file pat…… -
Java – OpenSSL decryption returns false
I try to encrypt the password in Java and decrypt it in PHP using opensll I got nothing but Boole This is my java code…… -
What language can replace Java?
I may release a premature question. Maybe I'm just scared for no reason, but the way Oracle handles Java is not very p…… -
Java – JPA inheritance is not dry
I have inherited the job, but it's not very dry I have to repeat the coding for each new bolt type It's best to show m…… -
Java – Android image view gradient background
Therefore, I don't want to update ImageView to change the gradient according to some events of mobile phone gyroscope …… -
Java – Base64 coding takes too long in Android
I capture images with my camera I save the file in the public photo directory and save URI to the file I want to save …… -
Java beginners about string [] args in the main method
So I'm just trying to exclude string [] args from the main method It's assembled! But the JVM is displaying an excepti…… -
Java – is JDBC secure?
I am a novice in JDBC. The new project requires me to use JDBC What I want to know is, Is JDBC secure? How to prevent …… -
Java – sqlnestedexception: unable to create poolableconnectionfactory (user ‘< >‘ @ ServerIP ‘denied access (use password: Yes))
I have an openshift site that tries to connect to an external MySQL server Here is my code so far public class BaseDAO…… -
Java – Grails overrides default email authentication
I found that Grails authentication also rejected some valid email addresses I opened a question on GitHub here Is ther…… -
Java – Method getbuild() does not define type mvcuricomponentsbuilder MethodArgumentBuilder
The problem of building URIs for controllers and methods from views @Controller @RequestMapping("/produtos") public cl…… -
How to use the & operator in Java? Porting C code
So I have this simple code in C if (flags & 4) Now, when I migrate rows to Java: if ((flags & 4) == 1) It will…… -
Java – how to establish websocket connection in Android service?
I've been trying to create an Android service that will allow me to maintain a websocket connection and send some data…… -
Unable to create service com parse. PushService：java. lang.NullPointerException
I'm using the service https://www.parse.com Push notification My code: ParseCrashReporting.enable(this); …… -
JBoss logging for Java unit testing?
I inherited some java code explicitly implemented using JBoss logging I know this is usually configured as JBoss subsy…… -
Java – tolower case (char) method?
Obviously, there is a method that accepts a char and returns a char: http://download.oracle.com/javase/6/docs/api/java…… -
Java – Tomcat JDBC connection resource not published
I have a project using Tomcat JDBC connection pool According to JDK specification, connection The close () method shou…… -
How to convert XML to JSON in Java and avoid the parser trying to parse strings into numbers
I'm using org json. XML library to parse XML into JSON http://www.json.org/javadoc/org/json/XML.html In my XML documen…… -
Java – cannot add to ArrayList “misplaced construct (s)”
I have a simple ArrayList setting, but I can't seem to add objects import java.util.ArrayList; public class Inventor…… -
Java – update database in JSP
I wrote this java code for my JSP page to update the user's current login details The code does not show any errors or…… -
Java – use the long string in JSON (> 1 show) of Jackson token stream
I'm trying to write some code to process JSON documents, which contain extremely long string values (more than 1 billi…… -
How about Printing Java maps?
See English answers > How do I effectively iterate over each entry in a Java map? 38 I created the following maps: …… -
Java – error trying to create hive table using custom serde
I have a file that contains the data that needs to be uploaded to the hive table I wrote a custom serde (which is basi…… -
Java – use hibernate 4 and Postgres’s “select for update of”
I'm using Postgres 9.3 5 and recently updated hibernate from 3.2 to 4.3 eleven As a result, I couldn't run the "select……