包含标签:Java 的文章
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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 – use static variables in spring annotations
I am using spring's preauthorize annotation as follows: @PreAuthorize("hasRole('role')"); However, I have defined 'rol…… -
Java – a good tool for debugging verifyerror
I found bytecode verifyerrors notoriously difficult to debug JVMs provide little feedback, usually just the current cl…… -
Java – synchronization difference between field reading and volatile
In a good article with some concurrency tips, an example is optimized to the following lines: double getBalance() { …… -
Java – find the complement of color programmatically?
Is there any way to find the complement of the color of a given RGB value? Or can only find some colors? Will anyone d…… -
Java – implementation comparable to generic classes
I want to define a class that implements a general comparable interface In my class, I also define a generic type elem…… -
Java: freeze objects accessible from the final field
Dzone refcard entitled "core Java concurrency" points out: and I am not fully aware of the second statement Does this …… -
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…… -
Unknown column in Java hibernate ‘field list’
I need a help When I use getallstreets() method, I have HQL error: org.hibernate.exception.sqlGrammarException: UnkNow…… -
Java – missing “run JUnit test”
I created a JUnit 4 test in eclipse by right clicking the Java class and selecting new JUnit test case When I right-cl…… -
Java – assignment of value in array index
Please check the following code snippet to let me know how to output 1.2 int[] a = { 1,2,3,4 }; int[] b = { 2,1,0 }; S…… -
Java – how do I get the server port number when using a JMX server with a transient port?
When launching a Java application using the following options: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmx…… -
Java – annotation processor output in maven
I'm using JSR 269 as a compile - time method to analyze code and fail it if necessary Solution I think you encountered…… -
Java – can eclipse refresh Tomcat applications automatically?
I use eclipse indigo (EE) to build applications in the Java framework vaadin, Otherwise, when I refresh the applicatio…… -
Java – images are not cached locally (using the general image loader) – slow image loading time
Problem Description: Image loading is very slow... I thought using the "universal image loader" to cache images on the…… -
URL routing in Java
From other web frameworks, I'm used to being able to map part of a URL to method parameters I know web XML provides a …… -
Java – why does switching from infinite loop to TimerTask cause CPU utilization to decrease?
I wrote a daemon with the following structure: @ h_ 502_ 2@while ( true ) { // do some stuff Thread.sleep( 1000 ); } I……