Recent Posts
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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…… -
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 – 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…… -
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…… -
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…… -
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…… -
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…… -
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…… -
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…… -
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 – 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 …… -
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…… -
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…… -
Setting an instance in Java?
Java defines a set interface, where contains() is defined as follows: The collection interface defines contains() as f…… -
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…… -
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…… -
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,…… -
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…… -
Java – are there any side effects of using many static functions?
At present, I am very interested in game framework because it can promote faster development When I see the code, ther…… -
Java – why should I use URL Openstream instead of URL getContent？
I want to search the content of a website html_content = urllib.urlopen("http://www.test.com/test.html").read() In the…… -
How to use Apache math 3.0 to generate bin of histogram in Java?
I've been looking for using Apache common math 3.0 to generate dustbins for specific data sets (by specifying low freq…… -
Java – why is char implicitly converted to byte (and short) primitives and when should it not?
Some features of the compiler puzzled me (using Oracle JDK 1.7 of eclipse) Therefore, I have this book that char primi…… -
java. lang.Math. Is pi equal to m of GCC_ PI？
I have written several reference algorithms in Java and C / C + + Some of these algorithms use π I want two implementa…… -
Bitshifting using BigIntegers in Java
I am using BigIntegers to implement DES encryption in Java I execute BigInteger The leftshift (int n) method shifts th…… -
Java – how do I rotate a rectangle in libgdx?
I rotate my sprites 90 degrees. I want to do the same for my rectangles so that they can be used for collisions, but t…… -
Java – splits a string into string [] for a period of time, but returns an empty array
Well, maybe I just need a second pair of eyes I have a floating point number and I become a string Then I want to spli…… -
What characters can be used to parse Java paragraphs?
I believe people will get a funny from this person, but for my life, I can't find a separator, which will indicate whe…… -
Check whether there are files or directories in Java
This java tutorial from Oracle: Why are they different? It has no further explanation Does anyone know more about it? …… -
How to convert comma separated string to ArrayList in Java
See the English answer > how to convert comma separated string to ArrayList? 23 import java.util.ArrayList; import …… -
How to insert big integer in Java preprocessing statement
I want to insert a large integer value using preprocessing statements. I have a string variable named XID (41527820021…… -
Java converts GIF images to PNG format
I have to build a java servlet to receive images and return images converted to PNG format How can I do this? Thank yo…… -
How to use long data types in Java?
See the English answer > the literal XYZ of type int is out of range It seems that I don't know how to use long dat……