Java
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Java – how does SSL protect data from sniffing?
I have a small website. Its security is very important to me I have no money to buy SSL certificate, so I want to make…… -
Togglegroup using togglebuttons JavaFX
How to deselect all togglebuttons in the togglegroup in JavaFX? There seems to be no clearselection () function like t…… -
Java – bean validation: how to manually create a constraintviolation?
I have a specific scenario where I can only manually check violations later in the process What I want to do is throw …… -
Java – is delayed initialization using immutable data always thread safe?
I have two classes a and B: class A { private final String someData; private B b; public String getSomeDa…… -
Java – why are the best practices for static classes different in OOP?
I'm currently reading about Java best practices. I find that according to this book, we must support non static static…… -
Java – a better way to implement an empty while loop to maintain control
I'm playing the background audio. I want the control of the program to remain stationary until the audio playback is o…… -
Java – StringBuffer class and Chinese character encoding
I wrote a method to return a string containing Chinese characters public printChineseMenu(){ StringBuffer buffer; …… -
Java – hibernate does not create tables – spring MVC
I have a spring project and I'm using hibernation When I started the project, DB didn't change I tried the difrenf con…… -
Java – why does the swagger annotation generate API docs with a default path prefix
I use the Maven plug-in below to integrate swagger with my application I configured the following in my spring servlet…… -
Java – use regexp to extract values between parentheses
Before management, I try to extract the value between parentheses (and) to check the existence of the value Please hel…… -
Java – Eclipse Plug-in: run the code immediately after startup
I want to display a message immediately after the plug-in starts If I put my code in activator At the end of the start…… -
Why does this multithreaded Python program print correctly from 0 to 99?
This is the code from Queue import Queue from threading import * threadLock = Lock() def do_stuff(q): while True: …… -
Java regular expression: if the closing bracket is the last character in the string, match any number of digits in the parentheses
I need some help to save my day (or my night) I want to match: >Any number of numbers > enclosed in parentheses …… -
Java – Android slidinguppanellayout up slide event
I'm using https://github.com/umano/AndroidSlidingUpPanel. It works well, but I'm trying to find some ways to listen fo…… -
How to use the same add () method in two different classes
Is there any way you can use the same add () method between two different classes (add content to the array)? For exam…… -
Java – ArrayList changes a property value of all objects
Java Spring Collection List<CustomObject> myList = new ArrayList<CustomObject>(1000); // list with thousnd…… -
Java – spring boot application failed to start
I recently started using spring boot to develop a web application, ANF, and tried to create these two files according …… -
Java – filter ArrayList with dates by start and end times
I am implementing a simple listview, where the data source is an ArrayList, which contains name, start and end dates I…… -
Java – how do I force MKDIR to overwrite an existing directory?
I need my program to create a directory with a specific name and overwrite any existing directory with that name At pr…… -
Java – Android NullPointerException when trying to retrieve data from sqliteopenhelper
When trying to retrieve all SQLite rows from sqliteopenhelper, I encountered the following error in logcat Caused by: …… -
Java – why does 10 > > 2 5 > > 2 evaluate to zero?
Consider the following codes: int a=10,b=5; int c=a>>2+b>>2; System.out.println(c); At run time, the (surp…… -
Java – use TreeSet for sorting without providing comparator
I know that TreeSet in Java will automatically sort its elements in ascending order to ensure the order For example, i…… -
Java – why does my socks proxy code throw a socketexception: a malformed reply from the SOCKS server?
Why does my socks proxy code throw a socketexception: a malformed reply from the SOCKS server? I tried on urlconnectio…… -
Java – spark job server: “the server cannot respond to your request in time”
I'm using spark job server to run spark jobs. It works normally But when I try to do a big job (it takes more than 40 …… -
Java – JBoss wildly and Jersey web service deployment error jbas011859: naming context is read-only
I am using Jersey servlet (1.18.1) to process Java Web services projects When I deploy my ear file to JBoss wildfly (8…… -
Java – a case insensitive sort set – maintains the same string in different cases
Today I have a case insensitive sort set, such as: Set<String> set = new TreeSet<>(String.CASE_INSENSITIVE…… -
Why Java io. File does not implement autoclosable?
See English answer > why Java io. File doesn’t have a close() method? 5 try (File file = new File(FILE_NAME)) { …… -
Java – how Jenkins finds out if a given slave server is running a job
I have this unique requirement to check whether a given node is running a job I'm thinking about using groovy because …… -
Java – GCM: how to send heartbeat to GCM server
I want to send a heartbeat from my application to the GCM server, so the connection will remain active How can I do th…… -
Volatile in double check locking in Java
See English answers > why is volatile used in double checked locking class Foo { private volatile Bar _barInsta…… -
Java – extract the first letter from each word in the sentence
I have developed a voice to text program where users can say a short sentence and insert it into a text box How do I e…… -
How to use Java Time parses the date in the string from the year and week
In old Java, I could do this: System.out.println(new SimpleDateFormat("yyyy w",Locale.UK).parse("2015 1")); // shows M……