Java
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java – LinkedBlockingQueue put vs offer
I have a linked blocking queue and I am performing insert and delete operations I need to know which is better to put …… -
How to map MySQL char (n) columns to instance variables using JPA / Hibernate annotations?
For the "language" column in the MySQL table of type char (7), I encountered a JPA / Hibernate mapping problem In my e…… -
JUnit – select the specific test run in gradle
I'm trying to solve our chaotic test run. Unfortunately, I've just graduated We currently have TestNG and JUnit, and I…… -
Using java zip files: are there any restrictions?
I am creating backup routines for Java applications I'm also testing Apache commons compression to tar GZ, but its fil…… -
Java – Maven: compile and test at different source levels
I am currently developing a project to run on embedded devices The device runs Java ME JRE (equivalent to Java 1.4) Be…… -
Java – restore the old style of NetBeans 7.2 bookmark navigation in any way?
NetBeans 7.2 changed the way bookmarks work Before Ctrl Shift and Ctrl Shift Move the focus up and down in the same fi…… -
Java – after the authentication needs window pops up 7u21 and is updated
I've been working on a project for the past six months For this project, I have a GlassFish server instance in which w…… -
Java – how to pass a variable number of parameters to ant Exec
I have an ant target that accepts some variable parameters that can be passed to the exec task Using the old mechanism…… -
Java – fail fast iterator implementation
There are similar questions, but not exactly what I want to ask This link says that its implementation exists in the a…… -
Java – the data source JMX MBean cannot be unregistered when the spring boot application is closed
I have a simple spring boot application using org apache. commons. dbcp2. Basicdatasource as a datasource bean The dat…… -
Java – how to use the string list in namedparameterjdbc template to get the result
Try spring JDBC I use this as a reference I'm trying to get an actor with the same name Running this code gives me the…… -
Java – align swing components across panels
We have a JPanel that contains multiple jpanels containing jcomponents (let's say jlabels and jlabels) JText@R_540_241…… -
Java – remove the “Z” section from xmlregistry calender
When I like it below, GregorianCalendar calendar = new GregorianCalendar(TimeZone.getTimeZone("UTC")); calendar.setTim…… -
Java – change the default XML namespace prefix generated using jaxws
I am using jaxws to generate a web service client for the Java application we build When jaxws builds its XML for use …… -
Avoid multiple if statements in Java
I have written such a method But I think it should be refactored private String getMimeType(String fileName){ if(fil…… -
java – SimpleDateFormat String
I have this code block, where dateformat The format parameter will always be a string, which is why I do this ToString…… -
How does rxjava’s observable “iteration” work?
I started playing with RX Java and reactfx, and I became very fascinated But I have dozens of questions and I keep stu…… -
Java – what happens when we add two integer objects?
When we add two integer objects to Java, can anyone explain the internal behavior? (just like un@R_778_2419 @Object to…… -
How to use reflection to instantiate Java. Net using generics util. ArrayList
How to use reflection to instantiate Java. Net using generic classes util. ArrayList？ I'm writing a program that sets…… -
Java: a very simple scatter chart utility
I know there are many comparisons of java drawing libraries, but I can't find what I need I just want a simple and con…… -
Java-8 – always use cube-java8 to get exception “wrong type of constant pool index”
I am designing a sample project for Java 8 dialect My problem is that I didn't get it running I always get the followi…… -
Java – how to make the background activity smaller when opening the navigation bar?
I want my background activity to slightly open the navigation drawer to simulate the impact in the airbnb application …… -
=Vs = in Java
I am familiar with the = operator in Java. If it is executed as follows: i = 2; Is the same: i = i 2; But what is it =…… -
Java – do you have to learn AWT before learning swing?
If I want to write desktop applications using Java in windows, should I buy a book about swing and just skip reading b…… -
Java – clear groupid sonar
I'm using Maven and sonar with eclipse I already have my Maven project on localhost 9000 Solution I have the same prob…… -
Java – how to reuse application filters and maps in streams?
I have a group of domain objects inherited from the shared type (i.e. grouprecord extension record, requestrecord exte…… -
How to use getsystemcpuload() in JMX
Hello, I can't use getprocesscputime() or getprocesscpuload() or getsystemcpuload() in my java program I have used the…… -
Java. io. IOException, “bad file number” USB connection
I'm setting up a USB connection between my Android phone and another device Now just send bytes to test I get some cle…… -
Java – why is PriorityQueue not like a queue?
I'm using priorityblockingqueue and priority fields In my tests, I used system #currenttime () as the priority - the c…… -
Java ee6 program scope
I need a schedule that runs every 5 minutes from 10 a.m. to 5:45 p.m. how can I do this with the @ schedule annotation…… -
Java – display blob (image) through JSP
I have a code to display employee charts Data (name, phone, photo, etc.) are stored in SQL server and displayed throug…… -
Jdk8 Java Does time have a Jackson data type module?
I'm working on the new jdk8 Java Time course looking for a module I've seen fasterxml GitHub project listing, but I ha……