Java
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Java: namedquery string problem
Hello, I encountered some exact matching problems when doing namedquery I am currently using something like this: @Nam…… -
Java – time complexity of iterating over array lists
I have an array list and I iterate In each iteration, I call get () to get an element, and if the item passes some con…… -
dispatch_ semaphore_ Grand central dispatch of create – lvalue parameter?
In dispatch_ semaphore_ In create, what does the long value parameter mean? dispatch_semaphore_create(long value) I do…… -
Java – displays JPA SQL statements when using play framework 2
I am developing a web application using play framework and JPA / hibernate For debugging purposes, I'm glad to see the…… -
Java simple telnet client using socket
I have read a lot about this topic. Telnet is a protocol, not a simple socket connection, waiting for line breaks, usi…… -
Java – text editor with syntax highlighting and line numbers?
This is a bit of a challenge for a team project, let alone a single person implementation, but I tried to use jeditorp…… -
Is there any reason to implement Java for other types util. Comparable？
Classes that implement comparable < T > usually implement it for themselves, such as class MyInteger implements …… -
How to get webelement text using selenium
See the following elements: <div class="success"><button class="close" data-dismiss="alert" type="button">…… -
java. sql. Sqlexception: no suitable driver found
I tried to use the following dbquery The Java class performs a simple query, which uses the dbconnector to obtain a co…… -
How do I skip the first line of CSV in Java?
I want to skip the first line and use the second line as the title I am using the classes in Apache commons CSV to pro…… -
Image processing – how to multiply the spectra of two different dimensional images?
This is not a programming problem But I'm sure this is something widely known and understood in this community I have …… -
When using JSF primefaces, in Java Unreadable property on lang.string type
I'm trying to use the demo code in the site to implement deferred loading data in the data table PrimeFaces Lazy loadi…… -
Multithreading – OO design pattern for multithreading synchronization
Is there any generalization of objects and data and thread interactions for a given design pattern name? Obviously, sy…… -
“No select item” on JavaFX combo box?
stay Combo@R_705_2419 @What is the correct way to place items with null values in? Exception in thread "JavaFX Applica…… -
Java – restrict access to spring MVC controller – N sessions at a time
We have licensed commercial products (unimportant products in this case), which is limited by the number of concurrent…… -
Java – how to dynamically set rowheight in JTable
I want to place a string in a JTable that is longer than the given cell width import javax.swing.*; public class Exam…… -
Time complexity of Java Pascal triangle algorithm
Responsible for solving the following problems (Pascal triangle), which looks like this [ [1],[1,1],2,3,4,6,1] ] …… -
Java class comparator?
I want to compare two Java classes class ClassComparator implements Comparator<Class> { @Override public…… -
How to use JfreeChart to display dates on the X axis of a line chart
I tried to display the line chart with time (HH: mm: SS) as X axis and number (as y axis) for (Row row : sheet) { …… -
Java – programmatically resolve Maven dependencies outside the plug-in – get the repository systemsession and repository system
Maybe this will be a bigger task than I thought at first, but no matter I try to load a maven project from a file and …… -
Java – how to create a wicket URL that hides its parameters?
I am currently creating a set of links with the following code: BookmarkablePageLink<CheeseMain> havarti = n…… -
java – JNI. How to get jstring from jobobject and convert it to char*
This is what I have done so far: JNIEXPORT jint JNICALL Java_Tier3_NativeMethods_totalPalletsIn( jnienv *e…… -
Java – why is static final slower than new at each iteration
Why is code snippet 14 times slower than code snippet B? Code snippet A: import java.awt.geom.RoundRectangle2D; publi…… -
Java – how to use order in HQL?
I want to execute my HQL query like this: Query queryPayment=sixSession.createQuery("from Payment where vcode=:p_Vcode…… -
Java – cast to inner classes using generics
Consider the following codes: public class Outer<T> { public class Inner{ } public static <T&g…… -
Java – hibernate query cache is automatically refreshed when external updates are made?
I am creating a service with read - only access to the database In Hibernate, I have a query cache and L2 cache enable…… -
Java: text strings
class A { class A { String s4 = "abc"; static public void main(String[]args ) { String s1 = "abc"; …… -
I really need to define the minimum heap size for Java
I'm about to deploy the application to the real-time server, and now I'm in the part of setting the heap and permgen s…… -
Java classloader dilemma and locked jar
I was playing with classloaders in Java and noticed a strange thing If the classloader loads a class from a jar, even …… -
Java – NullPointerException at the end of the file
What I want is to access the EOF by reading the command line from the console and typing Ctrl z from the BufferedReade…… -
Java implicit conversion
Use the following code: Float a = 1.2; There is an error because it takes decimal as the value of double, which is a l…… -
Java – andengine – cannot instantiate activity
I'm a novice in Android development. I have a problem using andengine I tried to run an empty application, but got a r……