Java
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Java: how to cancel application exit
In one of my programs, I want to display a dialog when the user tries to exit the application The user must then choos…… -
Multithreading – how do I make Perl threads without copying all variables?
I have a Perl program that would be very useful to use some form of parallelism But I have a lot of data in variables,…… -
Write the GUI programmatically, or use the advanced GUI editor (Java Swing)?
I intend to write a swing based application (using NetBeans 6.8) It seems that NetBeans has a very advanced GUI editor…… -
Java – how to send a post request and get a file response?
I want to send post requests (such as HTML forms) and get files (HTTP Title: "content disposition: attachment; filenam…… -
Setting an instance in Java?
Java defines a set interface, where contains() is defined as follows: The collection interface defines contains() as f…… -
How big is the Java – integer cache?
The class integer has a cache that caches integer values So if I use the method valueof or in@R_633_2419 @Ing, the new…… -
Java – stores serializable objects in a file, but does not include some data
I have an object that allows me to store buffered image in my target file In the same object, I have the bufferedimage…… -
Java – eclipse menumanager: get imagedescriptor of image?
I can't let this work, so I think posting here may be a wise idea My problem is, I want to attach a small icon to the …… -
Problems with Java – renderscript support library
I try to use the Android renderscript support library on API 16 and later devices, and follow the steps described here…… -
Java – use the ‘super’ keyword when accessing non overridden superclass methods
I've tried to get inheritance rights in Java and have learned that when overriding methods (and hidden fields) in subc…… -
Java – set reference = null in the finally block?
One of my colleagues set null in the finally block I think this is nonsense public Something getSomething() { JDBC…… -
Email template library in Java
I know that there is a library called FreeMarker that can create email templates for Java Do you think this library is…… -
How to use xwpftable in POI to merge cells (or apply colSpan) in Java?
Creating a table in POI is very simple, but its tutorial is very limited. I can't find a simple merged cell in the tab…… -
Accessing inherited class variables in Java
If you inherit from activities that declare certain member variables, how do you access them in subclasses that perfor…… -
Java – persistent error message: an instance of an empty PK was incorrectly provided for the lookup operation
I'm trying to use NetBeans 7.01 to learn JSF 2.0 and JPA tutorials I am using Oracle Xe and JDBC_ 6. I used the JSF pa…… -
Java – create a custom tag library that extends the spring tag library
I want to create a custom tag library that should extend the existing spring MVC 3.0 tag library I want to do this bec…… -
Reinsert Na into vector
I have a value vector containing Na These values need to be processed by an external program that cannot process Na, s…… -
Java – references files through classpath in the context of spring
I'm trying to set up org springframework. beans. factory. config. Propertyplaceholderconfigurer spring bean. I have JD…… -
Java – vector vs ArrayList performance test
Everyone said that vectors should be used because of performance (causing vectors to synchronize after each operation …… -
Java – when the enumeration type reference is class How do I convert a string to an enumerated value?
I have code to set values on objects using the setter method One of the setters takes enum type as a method parameter …… -
Java extending class containing main method
I use the following code as part of my assignment class Base { public static void main(String[] args){ System.ou…… -
Multithreading – waiting for any given future in scala?
Suppose I need to perform some parallel tasks in scala Each task performs some blocking calls (for example, process. W…… -
Assign int to byte in Java?
int val = 233; int val = 233; byte b = (byte) val; System.out.println(b); I have a simple example: I have an integer w…… -
System and Java
I'm a new Java user Recently, I learned that (we use it in system. Out. Println) is a Java standard output object My q…… -
Java – wait for jdialog to close
I have a class filepathdialog, which extends jdialog, and this class is called from a class X This is a method in clas…… -
Java – how do I get the method name from this method?
I tried to create a function that returns the method name from this method: public static String getmethodName(final i…… -
Java – how to check if a class exists
Is there a static method of 'class' that can tell us whether the user input class (in the form of string) is a valid e…… -
Java – how JPA adds a unique constraint on the column of the @ onetomany relationship, for example, on the user name
I have a class website representing websites and class users The site can have multiple users class Site { privat…… -
Java – cookie domain contains dot?
I use GWT's cookies class to generate cookies When I use the following Cookies.setCookie(LOGIN_COOKIE_NAME,value,expir…… -
Java – convert iso8859 string to utf8? Ä Ö Ü = > Ã why?
What's wrong with this code? I made an iso8859 string Therefore, most of them are krypooutput No problem. But how do y…… -
Java – a substitute for hibernate or TopLink?
Is there a viable alternative to hibernate? Things that are not based on JPA are preferred Our problem is that we are …… -
Java – which continuous integration library do you use?
I used cruise control as the CI framework in my last project (I didn't find CruiseControl lacking, I just want to know……