Recent Posts
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Accessing smart cards using java
Due to project analysis, I am trying to understand how Java accesses smart cards I wonder if there is any type of virt…… -
Access volatile variables that cannot be accessed from outside the observable behavior of functions in the C language?
In C 03, the standard observable behavior (1.9 / 6) includes reading and writing volatile data Now I have this Code: i…… -
Concurrency – implement parallel execution in scheme
In SiCp Section 3.4 (serializer in scheme) on currency, there is a process called parallel execution, which is describ…… -
How do I find the declared identifier type in Java?
I have a simple class Apple extended from another simple class fruit At runtime, I can use Fruit fruit = new Apple(); …… -
Java – what is 1L for long, 1F for float, 1D for double, byte?
1L is long, 1F is float, 1D is double. How about bytes? long l = 1l; float f = 1f; double d = 1d; // byte b = 1?; What…… -
Java – how to change UI based on combo box selection
In the dialog box, if a combination is selected, one group of controls needs to be displayed, otherwise another group …… -
Java: how to catch interruptedexception on a thread when it is interrupted by another thread?
I'm developing a multithreaded application to connect to external servers - each on a different thread - and will be b…… -
Java – why GWT bootstrap?
I am new to GWT and am considering using Twitter bootstrap to build CSS framework But then I met GWT bootstrap, which …… -
Java – how do I add a scrolling view to the entire activity?
I tried to add a scrolling view around everything on the active layout, but it gave me an error that it can only be pl…… -
Java – Egyptian scores in C
The ancient Egyptians only used fractions in the form of 1 / N, so any other fractions must be expressed as the sum of…… -
What is an effective way to parse strings in Java?
How should I use java to parse the following string to extract the file path? ？ Represents any number of random chara…… -
Java – prevents ehcache from attempting to access the Internet at startup
I have a fairly simple non clustered application running ehcache with spring and hibernate I received this error at st…… -
Java – always return to the login screen
I have an application that starts the splash activity screen for 5 seconds, then opens the login activity screen, then…… -
Bitwise XOR Java length
I use Oracle Java 7.51 on Ubuntu 12.04 and try to do so long a = 0x0000000080000001 ^ 0x4065DE839A6F89EEL; System.out.…… -
Java – how do I add a scrolling view to the entire activity?
I tried to add a scrolling view around everything on the active layout, but it gave me an error that it can only be pl…… -
Java – validation does not apply to nested objects in play framework 2
I'm using constraint annotation to verify the objects in play! Frame 2 It applies to top - level objects, but not nest…… -
What is the difference between Amazon dynamodbclient and dynamodb classes in their Java SDK?
I'm using Amazon's dynamodb Java SDK and want to know the difference between Amazon dynamodbclient and dynamodb classe…… -
Java – log the device into a file
How do I redirect log records on my device to a file? My application hangs on the device, but works well on the simula…… -
How to make ‘map:: get’ return ‘optional’ or ‘optional’ of the found value empty()`
I'm trying to do this: return Optional.of(myMap.getOrDefault(myKey,null)); Really, what I want is to return optional i…… -
Java – get the last three elements from list / ArrayList?
I need to add the last three elements to the list Is there any practical way, or do I just use a for loop that iterate…… -
Java – “jarfile cannot be accessed in Linux”
We have a web application running under JBoss 5, which regularly starts a 'Java' process (using processbuilder) to com…… -
Java – NetBeans JFrame initialization; The build is good, but there is no window
I'm using Java and I'm trying to create a GUI using NetBeans I've done this before. I'm confused because my code doesn…… -
Java 8 – filtering with bipredicate
I have a stream of integers. I want to find two numbers whose sum is equal to the other number So I came up with the f…… -
How to convert InputStream to inputstreamsource or datasource to attach in spring JavaMail
I'm getting the input stream from jsch channelsftp, as shown below ChannelSftp channelSftp = (ChannelSftp)channel; …… -
How do I detect if a string contains any right to left characters?
I'm trying to create a method to detect strings written from right to left in Java I came up with this question to do …… -
Java – excel cell format in jasperreport Report
I'm studying the jasperreport report that generates Excel files For some reason, my cell format / type is not how they…… -
Java – class must be declared abstract or implement abstract method error
Here's my code. Suppose you change some text when you press the button: – public class MyActivity extends ActionBarAct…… -
If x in Java is in the array
See English answers > how to determine why an array contains a particular value in Java? 25 myList = ["x","y","z"] …… -
Java iterator implementation compilation error: do not overwrite abstract method remove()
Why do I receive the following compilation errors: Lriterator is not abstract and does not override Java util. Abstrac…… -
java. What are the benefits of NiO for web servers?
I know this is a recurring problem. I have read articles like the following http://www.mailinator.com/tymaPaulMultithr…… -
What does the Java – BufferedReader constructor expect from FileReader
I need to understand the differences between the two classes and how they work together As far as I know, FileReader r…… -
How to use the swing class java to draw a grid and detect the mouse position when clicking and dragging
I'm trying to use swing class to create grid UI (5 * 5) I tried a nested loop and dynamically added JPanel to JFrame I……