Java
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Java – Grails, how do I get an object without saving it
I'm new Grails and trying to create a form that allows the user to change the email address associated with his / her …… -
Search date range using Lucene in Java?
Can I search for a date range using Lucene in Java? How to build Lucene search query based on date field and date rang…… -
Java – what is the difference between a = a.trim() and a.trim()?
I'm in a bit of a mess I know that string objects are immutable This means that if I call a method from the string cla…… -
How to check whether a thread has started in Java?
See English answers > in Java, how do you determine if a thread is running? 8 I will start this post at some time A…… -
Why is it necessary to return a response object instead of a string object to an HTTP request in Java?
I defined my rest method to return a string data type as a response to an HTTP request That's it: @Path("/users/{name}…… -
How to use callbacks in Java to call functions, just as I did in c#?
I'm new to Java, but I need to write something like c# code (this is a hand-made prototype, just to illustrate what I …… -
Java – spring MVC – did not get the value in the JSP view
First of all, I am a novice in the spring MVC world I made a simple program in which spring MVC will process the get r…… -
Lambda – merge different types of mappings into one in Java 8
There are two maps >< integer, string > MAP1 is < ID, question > < integer, string > MAP2 is <…… -
Java – how to disable Skype extensions through selenium webdriver
Whenever I start Firefox, Skype is enabled How to use selenium & Java? Solution This is the solution (I solved thi…… -
Java – JPA: query to get the result according to the foreign key value defined in the entity class?
Netbean 6.9 generates the following JPA entity classes from this SQL Server 2008 table: I want to get all productdescr…… -
Java – how to load fragments in viewpager to select
Im uses three segments in viewpager. The problem of loading big data in large data loader works well in devices like H…… -
Java – spring hibernate 5 error value [org.springframework.orm.hibernate5.sessionholder used for key binding to thread
I just upgraded to hibernate 5 when trying to use getcurrentsession using spring hibernate transaction manager and fac…… -
Java – what are the benefits of using protected variables on getters and setters?
See English answers > java protected fields vs public getters 7 Solution Even if you use getters and setters (I per…… -
Java code to XML / XSD without annotations
I need to group and ungroup Java The course doesn't belong to me. I can't add animation so that I can use JAXB Is ther…… -
Java – mockito: how to run some code using the stub method when calling
I want to stub a repository class to test another class with a repository (holder class) The repository interface supp…… -
Java – executorservice, how to know when all threads complete without blocking the main thread?
I have a multi-threaded implementation. I create an executorservice and submit the tasks to be executed. I want to kno…… -
Check whether the user is root in the Java application
How do I verify that the user is root in a Java application? thank you Solution Simple Just use System.getProperty("us…… -
JPA2. 0: delete entity in onetomany relationship
How to delete an entity in a onetomany relationship @Entity @NamedQueries({ @NamedQuery(name="User.findByUserNamePa…… -
selenium – org. junit. Test and JUnit framework. Differences between test packages
<project name="JunitSuite" basedir="." default="clean"> <project name="JunitSuite" basedir="." default="clean…… -
Java bitwise operation
I have this line of code int b1 = 0xffff & (content[12]<<8 | 0xff & content[11]); I have a small bytearr…… -
Java – button click causes the application to crash
I just set up an onclick method, which is written in the activity class and will be called as soon as I click the butt…… -
How to output the content of scene graphics in JavaFX 2 to images
How to output the content of scene graph in JavaFX 2 to image In fact, I'm developing an application that basically de…… -
Java – singleton mode
Like my previous question, this question refers to effective Java I have many sub - questions this time >Privileged…… -
. Net – how to stop a worker thread in a multithreaded windows service where the service is stopped
I have a Windows service that uses a producer / consumer queue model to process tasks in queues with multiple worker t…… -
Java – how to use jmockit to pass an empty string to a private method during unit testing?
The following is the private method in my datatap class. I tried to JUnit test this private method with jmockit – priv…… -
Java – how to put Google Adsense in GWT
Does anyone know how to put Google Adsense ads in GWT web applications? Solution You can put the JavaScript code in Ad…… -
Deleting XML nodes using a Java parser
In the following example XML, if a Java parser is used, if e = 13, how to delete the entire B node <xml> <…… -
How to use Java comparator correctly?
If I have the following courses: public class Employee { private int empId; private String name; private i…… -
Java – how to use polynomials instead of bits to improve performance?
I have a 128 bit string, and my supervisor asked me to express the 128 bits as polynomials This is a scan of the paper…… -
Java – use Jackson to map objects from specific nodes in the JSON tree
Can Jackson's objectmapper ungroup from a specific node (and "down") in the JSON tree? Use cases are extensible docume…… -
How to convert ieee-11073 16 bit sfloat to a simple floating point number in Java?
The title is self-evident: how to convert ieee-11073 16 bit sfloat to a simple floating point number in Java? Solution…… -
Draw lines on the canvas with the mouse: Java AWT
The attempt is to draw a figure (now a line) with the mouse on the AWT canvas I tried java graphics for the first time……