Java
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Java – how to start the server Daemon in spring
I want to start the daemon mail service thread when the Tomcat server starts So I annotated a method with @ async anno…… -
Java – use ebean to map a collection of strings and enumerations (play 2.0)
There was a problem mapping strings and enum collections in my entity I followed different advice, but it didn't seem …… -
Java – how do I find file sizes in scala?
I'm writing a Scala script and need to know the size of a file How to execute correctly? os.stat('somefile.txt').st_si…… -
Java – how to add references in eclipse
I developed some software in access / VBA It handles lotus notes, so in the visual basic editor, I just went to the to…… -
Java – Scala point syntax (or missing)
When I came across a piece of code that meant nothing to me, I was experiencing this wonderful book Programming in sca…… -
Does Java support Julian calendar?
Oracle docs http://docs.oracle.com/javase/6/docs/technotes/guides/intl/calendar.doc.html It claims that Java supports …… -
Java – for a class that uses Jackson to execute collection, deserialization fails
I have the following JSON: { "item": [ { "foo": 1 },{ "foo": 2 } ] } This is basically an object that contains…… -
Java – generate fractal rotation
I need to use the algorithm iterated function system to draw fractal vortices This fractal has coefficients: 0.745455 …… -
Java – spring securely switches to LDAP authentication and database permissions
I implemented database authentication for my web pages and web services @Configuration @EnableWebSecurity @EnableGloba…… -
Java – a description of how the classloader loads static variables
Well, this is a novice question about Java, but I don't seem to be sure I have the following code in my course private…… -
Java – what is mongodb’s jdbc driver class name?
In the case of MySQL, like com mysql. jdbc. Like driver, what is the jdbc driver class of mongodb? In Java code, you c…… -
How to generate RTF from Java?
I work on a web - based tool that provides customized printing At present, we use java to build an XML structure, prov…… -
Java – connection pool for dynamic database connections
The problem setting is based on a web service (spring / Java, tomcat7 and MySQL). Each user obtains its own database, …… -
Java – hibernate SQL query result mapping / conversion to object / class / bean
1 2: Select (table. * *) / (all columns) ok String sql = "select t_student.* from t_student"; //String sql = "select t…… -
Java – which runs faster, ArrayList or LinkedList?
There is already an answer to this question: > when to use LinkedList over ArrayList? 30 List li = new LinkedList()…… -
JPA temporary information was lost during creation
I have an entity with a transient field When I want to create a new object instance, I lose my transient information T…… -
Java – calling a method is faster when you initialize an object or save it as a variable and call the method
Suppose there is a classA class that gives the value I need through non - static methods If I only need the value of o…… -
Use java to delete XML declarations from the generated XML document
String root = "RdbTunnels"; String root = "RdbTunnels"; DocumentBuilderFactory documentBuilderFactory = DocumentBuilde…… -
Java – can I instantiate an anonymous class in the constructor of an external class?
I have the following code: public class Outer { public Interface Anony { public void callback(); } …… -
Java – how do I accept self signed certificates for JNDI / LDAP connections?
I need to connect to LDAP directory through SSL In a non production environment, we use self signed certificates, whic…… -
Symbolic references in Java
I've been playing java reflection and reflection these days Class format I'm learning the LDC command In the JVM speci…… -
Java – is it really unique to use the unique ID generation of UUID?
I want to generate unique IDs, just like automatic increment in Java So I used the current nanosecond before, but I fi…… -
Java CPU utilization should be 100%… But not
I run a java program on my Core i7 laptop with 8 cores (4 physical, 4 HT) The program uses 8 parallel threads, so it s…… -
Java – use gradle to upload the source to the nexus repository
I successfully uploaded my jars to a nexus repository, which uses the Maven plug-in for gradients, but did not upload …… -
Java – how to dynamically set the layout in Android
Then, suppose there is an activity called mainactivity. There are two layouts, layout1 and layout2, with few buttons T…… -
Why package info Java useful?
When I run checkstyle on my java project, it loses package info Java file For some courses, but not all I don't know w…… -
Loading JDBC libraries on arm without executing Java application
OK, we have a Java application "app. Jar" in a UNIX home directory with an external SQLite driver library - myapp/app.…… -
Java – how to convert a stringreader to a string?
I'm trying to convert my stringreader back to a regular string, as shown in the figure: String string = reader.toStrin…… -
Java – hibernate update JPA foreign key
New flag new flag new flag new flag new flag new flag new flag new flag new flag new flag new flag new flag new flag n…… -
Java – spring opensessioninview filter with @ transactional annotation
This is about spring opensessioninview filter using @ transactional annotation in the service layer I've experienced s…… -
Rfc4226 hotp Java implementation
I tried to copy hotalgorithm Java code (hotalgorithm. Java) and compare it with the official hotp RFC 4226 example imp…… -
Java EE – MVN Tomcat: run – change the default Maven Tomcat port
Try following my spring roo tutorial steps: $mkdir sample $cd sample $roo roo> script --file filename.roo roo> q……