包含标签：Java 的文章
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Java – how to make the variable method take a single array as the first value of the varargs array?
Given the variable: Object[] ab = new Object[] { "a","b" }; Object[] cd = new Object[] { "c","d" }; When the following…… -
Java – resulset – cursor: rs.next() takes a lot of time
The cursor I returned from the database executes in 31 MS (milliseconds) But when I use this cursor to get more than 1…… -
Java – the jdbc driver throws a “resultset closed” exception on an empty resultset
I have a problem with the jdbc driver for SQLite I am using the select statement to execute the query If I get an empt…… -
Java – compare log4j and logger
Compare the logger of JDK with Apache log4j? Which is more suitable for a new project for Java 6? How do they compare …… -
Java – different series of xyline charts in different colors JfreeChart
I have created an XY line graph using JfreeChart. There are two data sets. I want both rows to be in different colors …… -
Java 7 switch statement, string does not work
According to the Java tutorials, in Java se 7 and later, you can use string objects in expressions of switch statement…… -
Reduce image resolution in Java
I need to use a java program to reduce the size of the image (not the width and height) I need to reduce the size from…… -
Why can’t violation parameter types in Java be overridden?
Java allows return types to be covariant when overriding superclass methods Why is it not allowed to use opposite para…… -
Java – JSTL string comparison always returns false
I'm trying string comparison <c:if test="${dept eq 'account'}"></c:if> But this always returns false I che…… -
Can the Java – hibernate tool generate JPA POJOs?
Can I know if the Eclipse Plug-in hibernate tool can be used to generate JPA entity @ entity? The generated java files…… -
Migration of JAXB for Java – Weblogic 12C disaggregation
We have a Weblogic 10.3 5.0, we are migrating to WL 12.1 2.0. 0. We are solving the problem of ungrouping WS calls fro…… -
Limit the length of content obtained by Java httpurlconnection
Yes, so I started to create a java download manager project that worked well The only problem I see so far is when I a…… -
Java – does hibernate 4 and ehcache need ehcache core library?
I tried to upgrade my hibernate 3 application to hibernate 4 The application uses ehcache When upgrading to hibernate …… -
Java – add parameters to the job context from the tasklet step and use them in subsequent steps of spring batch
Now, I use jobparameters to get the file names of my flatfileitemreader and flatfileitemwriter My batch can be tested,…… -
Java – servlet filter “proxy”, which only acts on the response of the remote endpoint
I need that some HTTP requests must be redirected to the spring boot web application / service, but on the requester s…… -
Java – what are the benefits of using “import static”?
What are the benefits of using "import static"? Solution In general, you should use the static import very sparingly O…… -
Java – replace El in JSP with spel from spring 3.0
Tired of old el, unable to call bean and other methods in JSP Can I use spiel from spring 3.0 in JSP? Solution Upcomin…… -
Multithreading – synchronous counter in clojure
If I want to keep a global counter (for example, count the number of incoming requests across multiple threads), the b…… -
Java – replace cutycapt
Is there any alternative to cutycapt... That can be accessed using the Java library In short, cutycapt is a cross plat…… -
How to set timeout on BufferedReader and printwriter in Java 1.4?
How do I set timeouts in BufferedReader and printwriter created using socket connections? This is my code for the serv…… -
Error when using logmanager (l4j2) and Java 8 (java.lang.reflect.annotatedelement cannot be resolved)
When I switched the JDK version of a new project from 7u45 to 8u20, I encountered a strange error At the beginning of …… -
Processing lists using rxjava and retrofit
I have several API calls (sequential, asynchronous), some of which return lists My API interface is as follows @GET("/…… -
Java – get the most common image colors
I want to get the most common colors from the image I use Java and I want to have the main color Is there any CBIR Jav…… -
The package imported by Java does not exist
I'm trying to use pdf@R_688_2419 @To write a simple PDF file, but the problem is that I received an error: cannot find…… -
Java – let actionlistener listen for changes in jtextfield instead of just entering?
So you may know that if you have a text field and add an actionlistener, it will only listen to the buttons However, I…… -
JPA best practices and Java 8 optional return?
I like the semantics of Java 8. I use a lot of such code in my Dao: public Optional<User> findBy(String username…… -
Accessing Gmail from Java
I need a library that allows me to use Java for email operations in Gmail (e.g. send / receive mail) Solution Have you…… -
Java – the best GWT codesplitting design encapsulates “modules”
At present, I am facing a challenging problem related to GWT code segmentation. I hope to provide some help I'm curren…… -
How to send custom XML packets using Java’s smack API?
I use the smack API in Java to connect to my XMPP server I want to send a customized message package as follows: <m…… -
ToString Java array
I have several arrays in a class I want to implement toString () to print all the values What should I do? public Stri…… -
Nsurlconnection / cfurlconnection HTTP load failed (kcfstreamerdomainssl, – 9813) IOS
At present, I am using a soap web service in IOS. My source code is as follows NSString *xml = requestXMLToSent; NSSt…… -
Java – how do I know if an array can be sorted by one or more swaps?
Given an array containing n elements, can we sort the array in ascending order by performing an exchange operation? Fo……