包含标签：Java 的文章
-
java. lang.Math. Is pi equal to m of GCC_ PI？
I have written several reference algorithms in Java and C / C + + Some of these algorithms use π I want two implementa…… -
Email template library in Java
I know that there is a library called FreeMarker that can create email templates for Java Do you think this library is…… -
Java – how JPA adds a unique constraint on the column of the @ onetomany relationship, for example, on the user name
I have a class website representing websites and class users The site can have multiple users class Site { privat…… -
How to parse this JSON response in Java
I want to parse these JSON responses: { "MyResponse": { "count": 3,"listTsm": [{ "id": "b90c6218-73c8-30bd…… -
Java – multiplication overflow of two ints results in negative numbers
Consider this fragment in the Java language specification class Test { public static void main(String[] args) { …… -
Java – why is char implicitly converted to byte (and short) primitives and when should it not?
Some features of the compiler puzzled me (using Oracle JDK 1.7 of eclipse) Therefore, I have this book that char primi…… -
How to use xwpftable in POI to merge cells (or apply colSpan) in Java?
Creating a table in POI is very simple, but its tutorial is very limited. I can't find a simple merged cell in the tab…… -
Java – cookie domain contains dot?
I use GWT's cookies class to generate cookies When I use the following Cookies.setCookie(LOGIN_COOKIE_NAME,value,expir…… -
Java – how to get latitude and longitude information from a picture
How to obtain longitude and latitude information from the picture storage in the device or SD card? Solution I found a…… -
Java – httpclient publishing progress and multipartentitybuilder
I tried using httpclient 4.3 3 and multipartytybuilder achieve progress when uploading files So I actually execute a p…… -
How to use Apache math 3.0 to generate bin of histogram in Java?
I've been looking for using Apache common math 3.0 to generate dustbins for specific data sets (by specifying low freq…… -
Accessing inherited class variables in Java
If you inherit from activities that declare certain member variables, how do you access them in subclasses that perfor…… -
Java – convert iso8859 string to utf8? Ä Ö Ü = > Ã why?
What's wrong with this code? I made an iso8859 string Therefore, most of them are krypooutput No problem. But how do y…… -
Get the return list from foreach Java 8
I'm trying to use stream to deal with something. I think I have a conceptual misunderstanding I try to get an array, c…… -
Java – gradle always executes println from any task
I have a simple build Gradle (or build. Gradle for any task with println) println GradLeversion.current().prettyPrint(…… -
Java – why should I use URL Openstream instead of URL getContent？
I want to search the content of a website html_content = urllib.urlopen("http://www.test.com/test.html").read() In the…… -
Java – persistent error message: an instance of an empty PK was incorrectly provided for the lookup operation
I'm trying to use NetBeans 7.01 to learn JSF 2.0 and JPA tutorials I am using Oracle Xe and JDBC_ 6. I used the JSF pa…… -
Java – a substitute for hibernate or TopLink?
Is there a viable alternative to hibernate? Things that are not based on JPA are preferred Our problem is that we are …… -
Java – HQL, where in indicates an empty list crash
I have an HQL statement like this: Select cast(ed.employee.employeeID as int) AS emp_id FROM Education AS ed WHERE ed.…… -
How to use Java’s org w3c. dom. Get text from node_ TagName for node
In the interface's documentation, it declares that text nodes return "#text" as their name instead of the actual tag n…… -
Java gets the first two decimal digits of a double
I have a huge double, and I want to get the first two decimal numbers as floating point numbers Here is an example: do…… -
java – kryo. ReadObject causes NullPointerException with ArrayList
When I use kryo to deserialize the ArrayList object, I get a NullPointerException Caused by: java.lang.NullPointerExce…… -
Java – order of static initialization blocks
I found a lot of posts on the static initialization block, but I tried to better understand the execution order and wh…… -
Layout – how do I get the buttons to populate the JavaFX gridpane?
Java swing has a GridLayout that allows you to specify the size of an array of widgets, such as 3x4 The widgets then p…… -
Java – add filters to Project Explorer in eclipse
I want to add a new filter in Project Explorer to hide it from users in @ L_ 301_ 0 @ some projects automatically crea…… -
Java – JSTL for each in JSF 2
Hi, I got the following code: <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTM…… -
Java – what features does EJB3 bring and how does EJB3 integrate with the spring framework?
I have never been involved in EJB work. When I started programming spring, it was already here. All my projects only u…… -
Is there a ‘checked’ keyword equivalent to c# in Java?
Yes, this is a very simple piece of code, but I still want to know if there is a built-in alternative This is the code…… -
Java – improved main screen algorithm
I'm trying to make a good java program to generate prime numbers from 1 to n (mainly for project Euler problems) At pr…… -
Java – how do I get host names based on IP addresses?
I want to find the host name based on the IP address given in the program Solution Yes, it may import java.net.*; publ…… -
Java – given a list of IP addresses, how do you find min, max?
In Java, I have an ArrayList of IP addresses How do I find the minimum and maximum values? I have used collection Min …… -
Java – conditionally skip TestNG tests
I don't have much experience with TestNG annotations, but I'm trying to build a test suite using the TestNG framework ……