Java
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Java – comparison of two empty objects of two different types
public void m1(Integer f) { public void m1(Integer f) { ... } public void m1(Float f) { ... } public void ma…… -
Java and Net: Base64 conversion confusion
I'm converting text to Java (Android) and Net (Visual Basic) ASCII characters in simple (readable) form are converted …… -
java – JPA / Hibernate Embedded id
I want to do something like that: >An object, reportingfile, can be a logrequest or logreport file (both have the s…… -
Java – is it safe to lock multiple reentrantreadwritelocks in the same try block?
Suppose I have two key resources, Foo and bar I protected them with some reentrantreadwritelock reentrantreadwritelock…… -
Java – ActiveMQ: dead letter queue keeps my message order
I use ActiveMQ as a proxy to deliver messages These messages are written in dabatase Sometimes, the database cannot be…… -
Java – how to write cron jobs in play framework 2.3
I'm using play 2.3 8 (activator) & mongodb is DB I have some products in the product series. Each product has a va…… -
Java – how to configure a single threaded forkjoinpool?
Can forkjoinpool be configured to use 1 execution thread? I am executing code that calls Random in ForkJoinPool. Every…… -
Java – programmatically lock the direction in Android
I have the following code Java public void lockScreenOrientation() { setRequestedOrientation(ActivityInfo.SCREEN_O…… -
Is Java’s RNG (using seed) platform independent?
Apologize in advance for the (seemingly obvious) question I didn't find the answer online, so I think I would ask: Uti…… -
Java – orientdb encountered problems using Unicode, Turkish and enumeration
I'm using a lib with enumeration types, which are similar to consts; Type.SHORT Type.LONG Type.FLOAT Type.STRING When …… -
How to substring a UTF8 string in Java?
Suppose I have the following string: R ü ckrufinsausland. I need to insert it into a database with a maximum size of 1…… -
Occurs before the relationship in the JAVA memory model
With regard to JLS ch17 threads and locks, it says "if an action occurs before another action, the first action is vis…… -
Java – why doesn’t implicit conversion happen here?
I'm looking to convert a char array to a set of characters Logically, if I write something like how to convert an arra…… -
Java – pass variables from servlet to JSP
I have seen other problems similar to this problem, but none of them helped me solve my problem Basically, I'm trying …… -
Vector – what is the correct way to convert VEC to FFI without reallocation?
I need to pass an element VEC in the FFI Through the experiment, I found some interesting ideas I started to give the …… -
Java – delete items from the list or add build new list?
Usually, I have to iterate over an ArrayList and want to create a subset from it based on any condition From a perform…… -
Stop the running process through the GUI in Java
I have a GUI program that executes TestNG automation scripts This means that users can easily configure certain settin…… -
Java – ANTLR independent input
I have a syntax file, boardfile G4 (only relevant parts): grammar Board; //Tokens GADGET : 'squareBumper' | 'circleBu…… -
Java – play framework 2.3 – CORS title
Updated play 2.5 to provide a new CORS filter With the completion of the migration of the response class to promise cl…… -
Java – how to use mockmvc to pass the @ requestbody parameter of the controller
Parameters with @ requestparam annotation can use: Post ("/ **********************************************************…… -
JavaFX displays properties in controls
I am completing the JavaFX tutorial for Oracle myself After years of rocking (a long time ago), I was fascinated by ne…… -
Java – fragment variable ondestroy ()
There is already an answer to this question: > ondestroy() – to set or not to set instance variables to null? one S…… -
How to add mouselistener to a frame
I want to add a mouselistener to the MT JFrame framework, but when I execute frame When addMouseListener (this), I get…… -
Java – use Jackson to deserialize arrays
I have a json-rpc client like this, I can't deserialize it {"value":"xxxx","type":"xxxx"} Objects I want to deserializ…… -
Querying interfaces in Java
Say I have two interfaces a and B: public interface A { public int data(); } public interface B { public char dat…… -
Java – performance advantages of static empty array instances
The usual approach is to extract the return value of an empty array of constants as static constants Like here: public…… -
Java – how to correctly encode this URL
I tried to get this URL using jsoup http://betatruebaonline.com/img/parte/330/CIGUE ÑAL.JPG Even with coding, I have e…… -
Java – continue statement marked in the while loop
The following simple example causes compile - time errors But it is not clear why public static void main (String[] ar…… -
Java – throw multiple exceptions from a method
How to throw multiple exceptions from one method at a time? Example: public void doA() throws Exception1,Exception2{ …… -
Java swing JFrame size returns a larger screen size
When investigating some problems in my application, I found something strange Basically, the sscce should prove this p…… -
Java Gregorian calendar time zone
I have a strange question about Java Gregorian calendar: SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm…… -
How do you use CouchDB change notifications to make continuous changes from Java?
I'm trying to use CouchDB (continuous) change API in Java and find that after exhausting the current change list, the ……