Java
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Multithreading – is there a greendao thread safety best practice?
I've gone with greendao and it's all good so far One thing that doesn't seem to be covered in documents or websites (o…… -
java – View. Onclicklistener() function or interface
View. Is onclicklistener() a function or an interface? When we try to set up an onclicklistener () method in Android, …… -
Java – getmethods () return method I didn’t define when I implemented the general interface
A simple interface: interface Foo { void myMethod(String arg); } class FooImpl implements Foo { void myMethod…… -
Java EE applications and MySQL – what cloud services do I use?
I have developed a fairly small application with Java EE, hibernate, MySQL and Tomcat Now I want to host it in the clo…… -
Use java to generate certificates, public keys and private keys
I am looking for a Java library or code to generate certificates, public keys and private keys I think this is a doing…… -
Java – prevents suffixes from being added to resources when the page loads
I have a JSF 2 application running without any problems My problem with JSF is the resource bundle All resources are a…… -
Java – exclude classes from dependencies in maven
I have a project that relies on a vendor controlled artifact This artifact contains some classes I depend on, some of …… -
Java – how do I get the current method from the active eclipse editor?
I'm using an eclipse plug - in that will help me code It is basically a library of string fragments When creating a ne…… -
Java – web services using Google App Engine
I see that Google App Engine can host web applications that will return HTML and so on But what about web services tha…… -
Java – get internal properties of LDAP objects
I tried to get LDAP user internal attributes, but I couldn't find how to get them DirContext ctx = this.getDirContext(…… -
Java – how do you convince other developers not to ignore exceptions?
I recently encountered an error in an application taken over by another developer I debugged the reason. After more th…… -
How do I display text vertically in jlabel? (Java 1.6)
I'm looking for vertical text, the first letter at the bottom, the last letter at the top, in jlabel Is that possible?…… -
Java StringBuilder. Setlength() – is the time complexity O (1)?
I'm going to do a lot of deleting the last character in stringbuilders Use sb Setlength solution (sb. Length() – 1); I…… -
How do I change simpledateformat to jodatime?
I need to change simpledateformat to another format, which is equivalent in jodatime public static String dateFormat(D…… -
Java – ArrayList deletes elements with indexes 0 and 1
I want to delete the elements in the ArrayList with indexes 0 and 1 But it doesn't work. I don't know how The code is …… -
Java – alternative to observable pattern?
When some state changes occur on object2, I need to perform some tasks on object1 Is there another way to use this pat…… -
How to automatically crop the white border of an image in Java?
What is the easiest way to automatically crop a picture with a white border in Java? Thank you in advance Solution If …… -
Does Java 1.7 use different character encodings?
We migrated our application from Java 1.6 to Java 1.7 We recompile the code using java 1.7 and receive an error at com…… -
Java – what type of data structure should I use to save table rows?
I'm a novice in Java. I just enter the query database So far, my results are in resultsetmetadata I think for each row…… -
How do I find country names from city names in Java?
I want to get the country name of Twitter users To this end, from < location >, some users wrote the label of th…… -
Java – understand the main loop in foreachtask of streams API
It seems that the core of parallelization of Java streams is foreachtask Understanding its logic seems crucial to obta…… -
. What is the Java equivalent of aggregateexception of. Net?
Yes Net, the aggregateexception class allows you to throw an exception containing multiple exceptions For example, if …… -
Java – how to use Jfilechooser to get directory paths?
I have a small java GUI application with a text field on it When the user clicks the text field, an event is triggered…… -
Java — Thinking about interface rewriting method
I have the following code. The generic ITest interface is extended by the non generic itestdouble interface Itestdoubl…… -
How do I get all the components of the panel in Java swing?
How do I get all the components of the panel in Java swing? Is there a method like foreach in c# to handle all the sub…… -
Java – parsing XML feed modules using “element already used”
I am parsing xml feeds using simplexml in Android: http://backend.deviantart.com/rss.xml?type=deviation&q=by%3Aspy…… -
How to make a full screen Java applet?
I am designing a psychology experiment using java applet I have to make my java applet full screen What is the best wa…… -
Why is java a compilation and interpretation language when jit also compiles bytecode?
I read that if a java source code is compiled into 'bytecode', then JIT is compiled into 'machine code' That is, the s…… -
Java – recursively cancel alloff completable future
If I had CompletableFuture<Something> future1 = service.request(param1); CompletableFuture<Something> futu…… -
Correctly handle null observable in rxjava
I have a situation where I'm creating an observable that contains database results I'm applying a series of filters to…… -
How to use “if else” in Rx Java chain?
I'm new to RX Java / RX Android I want to implement this case: choose different methods according to some conditions i…… -
Java – why is “010” equal to 8?
My simple question is why: System.out.println(010|4); Print "12"? I understand the bitwise OR operator, but why is "01……