Java
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Java – move background image in swing
Hello, I'm a novice programmer. We have a project We created a simple racing game with a moving background, but I insi…… -
Java – quickfixj login problem
There are problems with quickfixj The problem is that I can't send the login message correctly In addition, it's hard …… -
Missing instruction number in javap output
Whenever I try to understand the disassembly code of a compiled Java file, I wonder why some instruction numbers are m…… -
Using java to attach nodes to existing XML files
Hello, I'm looking for a solution to attach nodes in Java to existing XML files <data> <people> <pe…… -
Java – how do I move all even numbers to the front of an array?
Here are the questions – Given an array of integers as input, returns an array containing the same numbers as the inpu…… -
Java – why this swing error occurs when using repaint () instead of GetParent () repaint()？
This problem is based on the problem I came back with a simple swing dice program The original question I posted is he…… -
A Java method that can only be called by its own class or other subclasses
I want my class to have a method that can only be called by itself or its subclasses The closest is protected access, …… -
Use volatile to ensure the visibility of shared (but not concurrent) data in Java
I'm trying to implement a fast version of LZ77. I have a question for you about concurrent programming Now I have a fi…… -
Java decompiler and Java disassembler
I'm preparing the core Java. I have questions Is javap a disassembler or a decompiler? What's the difference between t…… -
Java – treemap deletes all keys larger than a key
In a project, I need to delete all objects whose key value is greater than a certain key (the key type is date, if imp…… -
How to convert set to ArrayList
How to add all elements of set < < set < string > >? VaR to an ArrayList < < ArrayList < strin…… -
Java recursion: Examples
I know how recursion works, that is: Method calls itself until it reaches the base case, and then it can begin to solv…… -
Java: using static methods of the parent class in subclasses
I tried to refactor my code by using the basecomponenttype class and inheriting my code in my electricalcomponenttype …… -
Java – error 403 when trying to deploy Maven project using Tomcat Maven plugin
I'm trying to deploy my project to tomcat7 using the eclipse IDE, and I encountered this error: Uploading: http://loca…… -
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…… -
Can I add Ruby gem / module like a Java jar file?
I use eclispse Kepler and dltk plug-ins to make ruby I can't "request" the nokogiri module because eclipse can't find …… -
Java – more appropriately, amortized o (1) vs o (n) for inserting unordered dynamic arrays?
This belongs to stackoverflow COM / help / on topic's "software algorithm", in this case, is a software algorithm that…… -
Delete the object created in ArrayList in Java loop
I'm trying to delete the objects I created in ArrayList: turtles.add(new Turtle()); I want to get rid of the last turt…… -
Java – remove the back arrow button from the action bar
In my android project, whenever I go from first activity to second, I get a left arrow button, followed by some text i…… -
The Java input date from scanner is on one line
I'm trying to read the date from the user to pass to the Gregorian calendar variable At present, I have an embarrassin…… -
Multithreading – do I have to signal an anonymous thread if the main thread completes?
Is it necessary to explicitly stop all threads prior to exiting a Win32 Application? 5 procedure TForm1.FormCreate(Sen…… -
Java – list iteration – General Logic
I have a bean list (list < aclass >), from which I create two sub lists based on some logic, including checking …… -
Java deadlock when synchronizing on local resources?
I see the problem of multiple thread deadlock in the same line of code I can't understand why the thread is blocked on…… -
How do I apply calculations on the springs @ value property?
application.properties: application.properties: //timeout in ms timeout = 20000; @Value("${timeout} / 1000") private …… -
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……