包含标签:Java 的文章
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Java – how to run common code for most requests in spring MVC web app?
Namely I mapped various URLs using spring MVC requestmapping @RequestMapping(value = "/mystuff",method = RequestMethod…… -
Java – how do I format an integer as a string of four zeros?
I try to do something similar in Java (eclipse indigo): input - 16 (integer); Output - "0016" ; input - 201 (integer)…… -
How to convert a dataframe to a dataset in Apache spark in Java?
I can easily convert a dataframe to a Scala dataset: case class Person(name:String,age:Long) val df = ctx.read.json("/…… -
java – Eclipse 3.5. 1 compiler error: due to error on required Library/ The outputformat type cannot be accessed due to the restriction of rt.jar
The mistake is so strange that I can't understand it I have installed eclipse RCP 3.5 1, import com.sun.org.apache.xml…… -
Java – how to get form data in play framework
Before asking this question, I found this neat post (but it can't solve my problem): I'm trying to use the play framew…… -
Java – Android eclipse all spinner fonts turn white
In my project, all spinner fonts suddenly turn white, which is why I can't find it They were all black before For exam…… -
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 …… -
Java – how to verify a secure password Regular expression on char []?
This question is a follow-up to this question: Why is char[] preferred over String for passwords? This is a good quest…… -
Java – how to disable speed logging
I've been trying to disable the velocity log, and the only way I've found so far is to set the positive result: runtim…… -
Java – an efficient data structure to check whether a string exists
I'm writing a program that will add more and more numbers or unique strings to the data structure Once I'm done, I nee…… -
Java – how do I find the JPA version?
How do I understand the JPA version I use in EJBs? to greet Solution Using the Java EE 5 container, you will get JPA 1…… -
Java – how to change property values at run time in spring
I need to change properties in the application at run time My properties file has hours.expired=12 My service private …… -
. Net – does the StringBuilder initialized with a string contain the exact (only) space for the string?
I wonder if this code StringBuilder sb = new StringBuilder("Please read the following messages."); ... initialize sb w…… -
Java – use hibernate JPA to store objects in columns
Can I store things like the following that use only one table? Now, what hibernate will do is to create two tables, on…… -
Java – customize webargumentresolver, such as @ pathvariable
I want to use a custom webargumentresolver as the ID – > entity If I use the request parameter, it is simple enough…… -
How to provide preprocessing instructions in Java
There is already an answer to this question: > how to mark java code such that it's not compiled [C#] #define PRODU…… -
Java – why can I set – Xmx to a value greater than physical and virtual memory on windows and Solaris?
On a 64 bit windows machine (each task manager) with 12gb ram and 33gb virtual memory, I was able to run Java (1.6.0_0…… -
Java – find duplicate entries in the collection
Is there a tool or library that can find duplicate entries in the collection according to specific standards that can …… -
Java – how to centrally print statement text?
So I'm developing my java project, and as part of the program, I'm printing text Example: public static void main(Stri…… -
How to work in Net application to identify possible memory optimizations?
We have one Net application, our customers think it is too large-scale deployment. We want to know what will help our …… -
Processing objects according to the implementation of interfaces in Java
I have been looking for design ideas to solve this problem in Java I'm using a library (I can't change it). For this e…… -
Java – unable to initialize class com sun. xml. internal. ws. fault. SOAPFaultBuilder
I use JAXB - impl - 2.1. In the Maven library 3.jar .. Everything looks good in the POM entry If someone encounters th…… -
Java – does not override generic methods in superclasses – > which one to use?
In view of this situation: public class Animal { public <T> void genericMethod(T t){ System.out.pri…… -
Java – BufferedReader does not read all lines in the file
I tried to read / proc / net / XT in Android 6_ qtaguid / stats. 2 a0 0 0 123456 311 48329 737 48 1 3 b0 0 0 0 0 0 0 0…… -
Java – a fast algorithm for inverting ARGB color values to ABGR?
I am using intbuffer to operate the pixels of bitmap, but the value in the buffer should be aabbggrr and the color con…… -
Java – the difference between the final variable and the static final variable
I'm just studying the final data members. What's the difference between the final variable and the static final variab…… -
Java – why mine Jar files run slower than programs in eclipse?
I have a java program that reads a large amount of input data from the database, operates on it, and then writes the d…… -
Java mimetypes filetypemap always returns the application / octet stream on the Android simulator
I'm trying to determine the mime / media type stored on the Android device (actually a virtual device used with the em…… -
Java generics: wildcards
So I'm reading generics to get familiar with these concepts again, especially when it comes to wildcards, because I ha…… -
Java – JUnit testcase object instantiation
Is a new (or different) instance of the testcase object used to run each test method in a JUnit test case? Or is an in…… -
Java – use Hadoop to process a large number of small files
I am using the Hadoop sample program wordcount to handle a large number of small files / Web pages (CCA. 2-3 KB) Since…… -
Java – I was studying robolectric, but something went wrong
I'm learning robolectric My project directory is, My unit test code mainactivitytest is as follows, package com.exampl……