Recent Posts
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Java – how to sort the values of the HashMap freemaker template
I have this HashMap in Java: HashMap<String,String> map = new HashMap<String,String>(); map.put("k1"…… -
Java – why can I assign a value to a char variable without explicit conversion?
I wonder why this clip works char ch1; ch1 = 'a' + 1; System.out.println(ch1); In line 2, instead of promoting the rig…… -
Java – hibernate restricted result query
How does the maxresult property of a hibernate query work? In the following example: Query query = session.createQuery…… -
Java – running Google App Engine applications on multiple client domains
I want our customers to integrate our Google App Engine Application into their domain For example, suppose a customer …… -
Java – is ThreadLocal better than HttpServletRequest setAttribute(“key”,“value”)？
The servlet specification (see my previous question) guarantees that the same thread will execute all filters and asso…… -
Java – firestore – objects with internal objects
Custom object with (documentsnapshot documentsnapshot) parameter It is also the internal object of firebsae. It retrie…… -
Java: non heap memory analysis
The problem we have is that our non heap memory has been growing So we have to restart our Jee (java8) – webapp every …… -
Comments – how do I discard bindings in Ocaml?
I want to comment the function in the external library as deprecated to ensure that it will not be used in my project …… -
Java – 1e9d divided by what does that mean?
This is a clip: String myTime = someTime / 1e9d + ","; Sometime is using system Derived from nanotime() 1e9d what are …… -
Rx-java2 – create custom operators in rxjava2?
It's hard for me to find examples of how to create custom operators using RX Java 2 I have considered several methods:…… -
In Java, is there any way to read the file when it is locked by another thread?
So I use the following command to create a lock on the file so that I can edit it exclusively: File file = new File(fi…… -
Java Swing; How do I make it so that the program starts on the far right side of the screen?
By default, my swing program starts at the top left corner of the display Is there any way to make it pop up on the ri…… -
Android – downloading the PDF from Dropbox to the phone from the given URI in Base64 will cause unreadable PDF corruption
You are reading PDF input bytes (hexadecimal) and storing them in the wrong format (text). For example, all valid PDF …… -
java – . Time format used in ICs file?
I'm creating one in Java ICs file, I need to know the date and time format to use This is the current format of my ICs…… -
Java – file upload “multipart / form” exception org apache. commons. fileupload. FileUploadBase $InvalidContentTypeException
I tried to upload a file using Apache commons, but threw the following exception org. apache. commons. fileupload. Fil…… -
What methods can represent weighted directed graphs in Java?
I can't use any external libraries, so I try to think of some ways to build my own data structure I was thinking maybe…… -
How to make indexof case insensitive in Java
I have a simple question How to use @ L_ 419_ Make indexof case insensitive in 0 @ This question has been answered in …… -
Java – log4j: error with Tomcat 6
I wrote a web application in Java EE I use log4j and Tomcat 6.0 28. When I start my application in tomcat, an error me…… -
What is the appropriate media type for Java – Hal JSON?
I'm using spring to create restful services, and I'm curious about the syntax of media types According to my understan…… -
Java – is there a more portable way to encapsulate pointers than jlong in JNI?
I've seen an example of using long / jlong to allow Java objects to hold C pointers: class Foo { private native lo…… -
Java – how to convert solrquery (solrj) to URL?
When using solrj, I want to know how to use Solr query syntax to convert solrquery objects to their URL representation…… -
Java – how to set the default code format and template for a new workspace
Eclipse allows Java class files to use custom formats and templates The general way to change these settings is from t…… -
Java – exclude a single JUnit test method without modifying the test class?
I am currently using JUnit 4 tests in another project to oppose my code As part of my automated ant build, I get them …… -
Java – conversion from bufferedimage to SWT image
After careful consideration, I found some codes to convert buffered image into SWT image (I won't read it for now): pu…… -
What is the Java template engine / API for creating text files?
I want to create files in different formats in Java - based web applications These files are plain text files without …… -
Java – CRC-16 with 0xa001 polynomial
I want to calculate CRC - 16 checksum of byte array with 0xa001 polynomial But I really don't know how to use it in Ja…… -
Java – realmobject and Parcelable
I'm new to real for Android, so I'm not sure if I'm getting close to this problem correctly I have a class that looks …… -
Java – how do I remember the last value in the swing GUI form?
I have a simple java GUI form made with swing It has some text input and check boxes, and I want it to remember the la…… -
java – MyBatis 3.0. 1 insert questions
I decided to move one of my projects from ibatis to mybatis and encountered an insertion problem mapper xml： <?xml…… -
Java – J2ME networks, threads and deadlocks
The simple MIDlet code (class MOO) is locked (after excerpt) (at least I think it is locked after reading this article…… -
When to use ‘Java util. Objects.*’？
I'm browsing the seven functions of Java. They talked about Java util. Objects course What I can't understand is the f…… -
How do I find infinite loops in Java Web applications?
One day, the CPU utilization of our Java Web application reached 100% We try to find the problem by using kill - quit ……