Java
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Java – what to use: executeupdate() or execute()?
Please tell me which two methods of executeupdate and execute are the values (?,?,?) of the inserted user (name, addr,…… -
Java – how to convert a character stream to a string stream pair?
I want to take a string and convert it into a word stream For example: I have: {"a", "apple", "B", "banana", "C", "car…… -
java – Spinner subitem
I want to populate the spinner with projects that contain main text and sub text, as Android studio shows when buildin…… -
Java – how to instantiate unit in scala?
All I want is to use some concurrent sets (they don't seem to exist at all) Java uses Java util. concurrent. Concurren…… -
Java. When creating a file using RandomAccessFile io. FileNotFoundException
When I tried to create a file using RandomAccessFile, I encountered FileNotFoundException: RandomAccessFile file = new…… -
Java – reformat code using regular expressions
We have an ArrayList of items in several classes. Every time I want to insert a new item in the list, it will cause me…… -
Java – default parameter in jar manifest
Is there any way to create a jar file that contains some parameters passed to the main class? (no need to add paramete…… -
Java – run each spring scheduler in its own thread
I have multiple components with @ scheduled annotation, and I find that spring starts only one at a time, even if they…… -
Java parseInt integrity check
I'm trying to parse an int from a string array element. Here's my code: String length = messageContents[k].replace("Co…… -
What are those Java threads that start with “pool”?
I have a problem with the Tomcat server that cannot be shut down normally I performed a thread dump after issuing the …… -
Java – how to capture TrayIcon Displaymessage() mouse click on the tooltip tone
Hi, I'm trying to show more details after the user clicks the mail balloon tooltip However, I can't find how to captur…… -
Looking for Java libraries that implement binary trees [closed]
Is there a Java library that can use binary trees? I don't expect to test and implement myself Solution The Java stand…… -
Add Java FX 2.0 to an existing NetBeans project
I have an existing Java project using swing in NetBeans, and I want to start using java FX 2.0 in some components of t…… -
Java – isn’t log4j thread safe after all?
(this is in sles11, Java 7, Tomcat 6, log4j-1.2.16) We use log4j to write different things to different log files I in…… -
Why does Erlang process creation and messaging take less time than Java and C#
I searched Erlang's process model on the Internet and found some chart slides 3-4 in a speech by Joe Armstrong They sh…… -
Java – how do I find and verify the encryption strength of the JDK security provider?
I have this applet that prints out all supported providers in my JDK installation, but I wonder if anyone knows how to…… -
Java – I can automatically execute JUnit test cases once when all logging is enabled and automatically execute after all logging is disabled
I have found a solution. Please refer to the answer below Does anyone have something more elegant? I think this is to …… -
Java – iso8601 using Jackson in JSON in milliseconds
import com.fasterxml.jackson.databind.util.ISO8601DateFormat; import com.fasterxml.jackson.databind.util.ISO8601DateFo…… -
Java – iterates over each possible double value
Consider the situation where you want to test each possible input value Creating a situation that iterates over all po…… -
Java – Android studio error: org gradle. process. internal. ExecException
I'm a novice in Android development, and I encountered my first mistake, which seems to be unsolvable I have downloade…… -
Multithreading – distributed computing and threading
How similar are distributed computing and threads? I found that two papers came to the opposite conclusion: "Multithre…… -
Java – Apache POI adds a series name to linechart
I am using Apache POI to create a linechart in an excel document As far as I can imagine, in the following figure: I w…… -
Java – change the color of the up arrow and mark it as a private warning
After defining a custom color for the backward arrow in the action bar, a warning is returned What can be done to get …… -
Java – white package icon in my eclipse package Explorer
I received these strange white package icons in the test project From what I see@ http://jamie.ideasasylum.com/images/…… -
JavaFX tableview edit that clicks and automatically inserts rows?
I use tableview in my program to display a few good lines Question 1: when a user wants to modify a value, he will dou…… -
Do you need a reference to the second value to sort tuple vectors?
I have a vector of integer tuples and want to sort them by the second element of each tuple: fn main() { let mut t…… -
Java – how to use JPA2 to persist entities containing user type fields
I'm looking for a way to persist entities that contain user type fields import org.joda.time.DateTime; @Entity public…… -
Java – monitor windows directory size
I'm looking for something that can monitor the size of the windows directory and the number of files I'm talking about…… -
Java – ehcache – uses list as the cache value
So this is the problem I'm trying to solve - I have an object with two integer fields, and I want to cache public clas…… -
The Java logger uses the… Function
See English answer > which of array creation vs string concatenation for logging method has better performance? 3 m…… -
Java – can I prefix each row of the stack trace in log4j?
When you write logger.error("message",exception); Log4j generates a message and a complete stack trace: Aug 9 06:26:1……