包含标签：Java 的文章
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Java – reads the httprequest content from the spring exception handler
I use spring's @ exceptionhandler annotation to catch exceptions in my controller Some requests save post data as a pu…… -
Java – Implementation of pop-up window method in IntelliJ
I am using IntelliJ 2016.1. I want to know if there is a shortcut to view the method body in the pop-up window instead…… -
Java – how to identify the cause of JNI global reference memory leak?
I am using Tomcat and still refer to the classloader instance of my web application after stopping my web application …… -
Java – how to insert the current date and time in the database using SQL?
I use the following code, but the datetime field in SQL is represented as: 2005-04-08 00:00:00 I also want to have tim…… -
Java – how do I check if BigDecimal is in a scale independent manner in a set or map?
BigDecimal's equals () method is also relatively large, so new BigDecimal("0.2").equals(new BigDecimal("0.20")) // fal…… -
How to create a file in Java?
I'm trying to implement the following operations in Java. I don't know how to: /* * write data (Data is defined in my…… -
Java – autocomplete jtextfield and arrow keys
I'm trying to use javax swing. JList builds a javax swing. Jtextfield, used for automatic completion, such as Google W…… -
Java – different “getdocumentelement” and “getfirstchild”
I have the following document objects – document MyDoc MyDoc holds an XML file myDoc = DocumentBuilderFactory.newInsta…… -
Java – always keep the mutable objects sorted in the TreeSet
I noticed that TreeSet does not keep mutable objects in sort order if the object property value changes later For exam…… -
Java – session variables in ServletRequest
I need to access session variables through a filter I don't even know if it's possible In fact, the problem comes from…… -
Java – I can do it without commons logging Using Apache httpclient in the case of jar
I'm trying to use Apache http client.asp in my project No logging for this application is required here So I can do it…… -
Java – get random elements from a sequence collection
I talked about an API and gave me a Java util. A collection of iterators This means I can iterate over it, but I can't…… -
Java – attempt to read NullPointerException of parcel string []
When I create an object from parcel, when I try to read back a string [], I get a NullPointerException This is my code…… -
Java – when excel (. Xlsx) is converted to PDF (. PDF) using open office, there are missing worksheets and page size problems
I have created an application using jodconverter and open office to convert excel (. Xlsx) to PDF. The application wor…… -
Java – EJB and CDI and entity boundary control mode
I try to understand CDI and EJB and entity boundary control (ECB) patterns My understanding of ECB mode is that bounda…… -
Java – GC Optimization: for vs foreach
I've been trying to optimize some of my code and got a strange conclusion about fors In my test case, I created a new …… -
What is the order in which initialization blocks and variable definitions are executed? (in Java)
I understand the order in which initialization occurs This is my hypothetical order: *Once per 1. Static variable…… -
Java – try to log in to XMPP server with smack result and “unauthorized” in SASL
I tried to log in to the XMPP server using smack When I try to log in, I receive the following error message: I have b…… -
Java – “when creating a simple RMI application,” ClassCastException: $proxy0 cannot be converted “error
I am creating my first very simple RMI client - server application This is the code: Interface "communication" package…… -
Java – how do I check the JDK version in oracle?
We have a Java class in Oracle database. Recently, an error was raised in a line of code in this class: static BASE64E…… -
Java – what happens when you look in a HashMap or HashSet when the object hashcode changes
In HashMap, the hash code of the provided key is used to put the value in the hash table In HashSet, hash codes are us…… -
What do comments in Java – IntelliJ source code mean?
When looking for the source code of the IntelliJ idea Community Edition project in GitHub, I found the following symbo…… -
Java – error upgrading Cordova application
For security reasons, I'm trying to get from Cordova 3.5 0 update a phone app to Cordova 5.1 one W/System.err( 1672): …… -
Is declaring many of the same anonymous classes a waste of memory in Java?
I recently browsed the following code snippet in the current code base and added the comments you saw there I know thi…… -
java. sql. Timestamp comparison error?
See English answer > java sql. Timestamp created from java. util. Date,why always before() it? two Date d1 = new ja…… -
Java – add the click handler to the horizontalpanel in GWT
How to add a click handler to the horizontalpanel? It uses adddomhandler () in the newer version of GWT, but I had to …… -
Java – establish a two to many relationship in JPA / hibernate
I have the following physical relationship issues The game must have two (only two) team objects "Team" can have many …… -
Java – why is the last number wrong?
Why output the last numeric error code: public class Test { public static void main(String[] args) { Syste…… -
Java – how to organize classes and packages
How do you decide what a package name should be, what classes should enter and what packages? I'm working on a project…… -
Java – data viewer for App Engine development server
Google AppEngine @L_ 419_ 0 @ use embedded database to simulate Google's back-end database It can create a file on the…… -
How to express numbers with scientific symbols in Java?
There is already an answer to this question: > 5 format double value in scientific notation 3.30 x 10ˆ23 One elemen…… -
Java – how to find the “last page” in the view pager Or total “views” Android Development
Thank you for your advanced help Sorry, if this is a very stupid question, but I can't find anywhere else Fragment f =……