包含标签：Java 的文章
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Java – converts dates to timestamps in scala
In Scala, I convert date to timestamp I am doing this: val date = new java.util.Date() new java.sql.Timestamp(new org.…… -
Java – my periodformatter didn’t behave as I expected – what did I do wrong?
I'm having trouble using joda time's periodformatter I want someone to report days, hours, minutes and seconds, but my…… -
Java – joda datetime format for xmlregionancalendar type
I use JAXB 2.2 8-b01 impl, I have a schema, which has an XS: date element, which creates an xmlregionancalendar instan…… -
Java – string S1 = = string S2 (true) but fieldoffset is different
When I was learning Java, I already knew that the correct way to compare two strings was to use equals instead of "= =…… -
How to replace classes in applications running in Java?
I have a class named namegenerator I can use it to generate names based on a given logic Then I write a testnamegenera…… -
If the parent class / interface changes, will the bytecode of the class change?
I am trying to determine whether some jars need to be recompiled in the build chain. If I have the following structure…… -
Java – print ArrayList element?
How do I print element "e" in ArrayList "list"? ArrayList<Dog> list = new ArrayList<Dog>(); Dog e = new D…… -
How to force a java thread to close a thread local database connection
When using thread local database connection, the connection needs to be closed when the thread exists I can do this on…… -
Java – Eclipse: search for strings in selected packages?
How do I search for strings in classes in multiple selected packages? Search multiple strings in eclipse seems to sear…… -
Use Java 5 enumeration as velocity variable
All I need to use Java 5 enumeration in the speed template so that I can write something similar public enum Level{ …… -
Java – how to set default headers for all requests in the Apache HTTP client?
For example, the default user agent can be set to: Solution Httpclient 4.3 now allows a set of default headers to be c…… -
Java – switch to BigInteger if necessary
I am reading a text file containing numbers in the range [1,10 ^ 100] Then I perform a series of arithmetic operations…… -
GradleWorkerMain OutOfMemoryError
I'm trying to score the NetBeans RCP project and find strange gradle behavior Environment configuration Gradle 1.9 Bui…… -
Multithreading – JPA and threads in the playback frame
I'm trying to create a multithreaded server The problem is that I received the following error: What I want to do is a…… -
Java exception wrapping: bad practice?
From the PHP world, there is only one way to write exception handling I find the exception wrapper in java a little "u…… -
Java – keep the dead line alive
In an interview with me, I raised the following questions (a few years ago) I have argued that there is no way But he …… -
Reading JSON two-dimensional array in Java
Each news item has three contents: title, content and date To retrieve entries from the database, I want to use jsonob…… -
Java library for creating straight skeletons?
I have a 2D polygon with holes as input. I need to find its straight skeleton, as shown in the figure: http://www.cgal…… -
Is there any unordered and repeatable collection class in Java?
See English answers > does Java has multiset data structure like the one in C + + STL? 6 It seems that pool is a su…… -
Java – get the location of the swing component
I put some jpanels into another JPanel, and its layout is @ R_ 987_ 2419 @ layout and y-axis That's what I did, JPanel…… -
Java – is logback mature enough to replace log4j?
I have read similar questions, such as this and this But they're about four years old! In addition, I also read the lo…… -
Servlets – infinite loop when forwarding requests in Java servlets
I hope you can help me solve the problem I face: I created a simple web application using NetBeans Up to now, this is …… -
How to find the date of an object in Java
Suppose I have a class named "test" and I create an instance of this class. Can I know the creation date of this insta…… -
How to replace the missing project . settings . Import the Java project of the classpath file into eclipse
I got a java source code from the opensource project The source code does not have eclipse project specific files, suc…… -
java – org. apache. batik. dom. svg. Where’s svgdomimplementation?
In documentation for batik, it shows how to get the apache. batik. dom. svg. Svgdomimplementation gets an instance of …… -
Database application of Java, JDBC and JPA
I would like to introduce that I am looking for a novice for advice because I am trying to establish good habits The a…… -
Java – can I statically import private subclasses?
I have a private enumeration. Don't expose it outside class Anyway, can I statically import this type so that I don't …… -
Java Apache spark: long conversion chain leads to secondary time
I have a java program that uses Apache spark The most interesting parts of the program are as follows: long seed = Sys…… -
Java – find JDBC datasource in WebSphere 8.5
I want to use JDBC connection in my webapp, which is configured in WebSphere (like here: how to use JDBC in JavaEE?) I…… -
Java byte data type
In the sun tutorial, it says a byte: How does it save memory? What is 2's praise? Solution It saves memory by consumin…… -
Java – HTTP header is used to “accept” httpurlconnection get request
I have read some related questions, but unfortunately they didn't answer my questions because I had specific requireme…… -
Java – is there any way to make SharedPreferences global in my entire Android application?
Is there any way to make SharedPreferences global in my entire application? Now I use these lines in many parts of the……