Java
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What’s the difference between Java – serialized objects because they can persist?
We know that serializable is a tag interface (that is, an interface without any methods) So I want to know how to impl…… -
Java – the difference between Max heap and sort stack
I want to know when we can use collections Why do we need a new data structure like Max heap when sort method sorts th…… -
Java – does the runtime match o (nlogn)?
I wrote a class (greedy strategy). At first, I used the sorting method with O (nlogn) Then I used the binary search tr…… -
Extract the zip file in the BlackBerry Java app
I'm trying to write code to unzip the zip archive and put the output in another folder Do I have to use a third-party …… -
Java – how to get the instance number
Is there any way to get the instance number or ID? I mean, you can see it in the eclipse debug > variables window a…… -
Java, wait for the child process to exit
Using Java's processbuilder, I'm creating a set of subprocesses I can use the waitfor () method in the generated proce…… -
Parsing IBM 3270 data in Java
I'd like to know if anyone has experience in retrieving data using 3270 protocol So far, my understanding is: connect …… -
JPA – jpql query select optional general Dao selection
I have retrieved the category object according to a valid JPA example: return (ArrayList<Category>) getEntityMan…… -
Java – send invalid XML characters in soap request
I want to send special (&, '(single quotation mark)) characters in soap request I use axis 1.4 The web service cli…… -
Creating jar files for Java applications
I created a Java application that uses the data in its config folder. It also uses a third-party jar file located in t…… -
How to delete drawing lines in Java?
The question is how to delete old rows? I mean, only the current X and Y lines are displayed on the screen, so that th…… -
Java – why are exception error strings different in different environments?
I have this code to handle catching specific exceptions private static final String CONNECTION_REFUSED_EXCEPTION = "ja…… -
java – Webdriver showModalDialog
We use webdriver for functional testing However, our application uses the showModalDialog JS function to open a pop-up…… -
Java – how to read international characters from the console
How to read international characters from the console in Java? Solution Using Java io. Console class, just like any ot…… -
Java – how to add a throws exception clause when implementing a defined method in an interface without a throws clause?
I need a class to browse the collection, and then I implement the iterator interface The only exception thrown by next…… -
Java – any website / book / technique for practicing recursion and OO design?
I just want to know if any websites have problems practicing recursion and OO design (given some entities that design …… -
Can java process delete loaded jars?
Hello, I have the following questions: During the unloading process, I loaded a jar (JDBC Driver) URL pDriverJar = jar…… -
Java – Android random number
I generate a random card from the array And assign it. " public void rand() { String rank[]= {"tclub1.png","tclub…… -
How to see whether two Java queues are equal according to the content value of each queue?
I want to implement an equals override, which compares two Java queue objects based on them, and the contents of each …… -
Servlets – how do I specify filter priority in a Java Web application?
Hello, I hope I can define two such filters <filter-mapping> <filter-name>SecurityFilter</filter-na…… -
Java – part of my layout moves up with the keyboard
My Android application has such a layout. When I open the keyboard, two imageviews are displayed on the keyboard at th…… -
Java – extract subgraphs from drawings using Jun?
I have a big picture. I'm using Jung I wonder if Jung provides a way to extract the two hop neighborhood of a vertex (…… -
How to convert Java util. The date object is converted to a restricted form of the canonical representation of datetime
I need to put Java util. The date variable is converted to a representation similar to the following 1995-12-31T23:59:…… -
Java – running Grails in a remote environment
I have a "named" server, which seems to cause Grails to be unable to find localhost Running Grails application.. 2011-…… -
Add listener at runtime? – Java MVC
In my MVC mode, my model generates components at runtime and provides them to the view to be displayed on the screen t…… -
Java – Notification led – color
I'm trying to experiment with LED colors on my Nexus One and I'm having trouble creating any LED lights (colors) with …… -
Why avoid using the c keyword in Java?
A popular editor uses highlighting to help programmers avoid using C keywords in Java Display the following words in t…… -
How to download CSV files using java servlets?
I have a sample java servlet file But it is exported to a local file But do I need to download the CSV file when I cli…… -
Java – use the layout to set the panel in the center of the screen
I try to set the position of the child panel in the center of the parent panel by using parent_panel.setLayout(new Bor…… -
Java – link list Insert integers in order
I have a linked list of integers When I insert a new node, I need to insert it not at the end, but at ord... I.e. 2,4,…… -
Java – cannot run jar files on another PC Possible problems with environment variables?
I have built a jar file that performs well on my PC (XP) with eclipse installed It also applies to another PC that als…… -
Java – use Boolean objects
I had a problem trying to get the results I wanted Basically, what I want to do is have a Boolean object, which will a……