Recent Posts
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Iterate over all byte values – 128-127 without Java casting
I need to traverse all byte values (- 128 to 127, including endpoints) I can use an int iterator, but I have to conver…… -
Is OOP – ORM a unique problem in object-oriented programming?
Object relational mapping (ORM) is a problem that must be solved in all applications that implement and use relational…… -
Java – does FileInputStream already use buffers?
When I use FileInputStream to read an object (such as a few bytes), does the underlying operation involve: 1) Read the…… -
Java practice: returns the same object passed as a parameter
In the following code, isn't it bad that updatewithcontext returns an object with the same parameters? class SomeClass…… -
Java – get components from JList by clicking the location
How do I get components from JList by clicking on a location? I have my own list cell renderer, I insert some panels a…… -
Java – use appbarlayout Behavior. Dragcallback to control the scrolling of the collapsed toolbar layout
I want to be able to enable and disable scrolling on the collapse toolbar Who can tell me how to use appbarlayout Beha…… -
Java – return files in spring MVC rest
I have the rest service code. The following code returns a file. Now the problem is that I get an original response in…… -
Java – the dropwizard does not record custom recorders to files
I have a dropwizard application. I configure the logger appender as a file, as shown below: logging: level: INFO …… -
When the mouse clicks, Java draws a circle
I'm writing a program that draws a circle when I click the mouse So far I have written the following code import java.…… -
Java – how does eclipse actually run JUnit tests?
I encountered a difference when running JUnit tests in eclipse and ant This is the scenario: Everything runs as expect…… -
Java – what does the syntax “final string… Args” mean / do?
This should be a fairly simple question I looked around and couldn't find any topic about this grammar, and "..." made…… -
Collections. Binarysearch (list, K key) clarification Java
In view of the following declaration, it is taken from this Oracle Java Tutorial and related to the binarysearch() met…… -
If I don’t know any of the frameworks involved, what methods should I use to understand large J2EE applications?
I started working in my company five or six years ago as a junior java developer. I started some J2EE programming usin…… -
Java – GVM is always offline
I'm trying to install gradle through the GVM command '$GVM I gradle', but I received a message in offline mode ➜ ~ ➜ …… -
JSF 2.0: verify the equality of two inputsecret fields (confirm password) without writing code?
I am using JSF 2.0 and GlassFish to develop pure Java EE 6 applications I want to verify whether the values of the two…… -
Java – window builder Pro not found in eclipse indigo
I read that eclipse indigo installed the window builder Pro plug-in, but I can't see where it is File / new / project …… -
Java – how to put hover effect on JButton?
I'm trying to create a java desktop application. I use two buttons I want to add a hover effect to these buttons I thi…… -
Java – which data type or data structure to choose to calculate the factorial of 100?
I want to write a program to evaluate the factorial of a given integer The following basics I wrote the following code…… -
Java – buffered vs. unbuffered, which one is used?
Sorry, if this is repeated, but I can't find the exact answer to each type of best practice I want to know what is the…… -
Java – place nested classes in a separate file
I have a nested class file, but it becomes long enough to be unreadable Is there any way to decompose nested classes i…… -
Compare hashmaps in Java
I have two hashmaps: foo & bar HashMap foo is a superset of HashMap bar How to find out the missing "key" in HashM…… -
Java – extract data from PDF417, such as driver licenses
I have an android app and I'm scanning PDF417 barcode images After scanning the bar code, I got the following results …… -
Minimal java8 NiO secure websocket client (WSS)
It took me a long time to find a simple java websocket client that can use WSS without mess I tried https://github.com…… -
Java based web framework alternatives
I tried to choose a Java based web framework to start a new project, so far I have a little troublesome decision I hav…… -
How do I get the difference between two Java maps?
I have two maps as follows: Map<String,Record> sourceRecords; Map<String,Record> targetRecords; I want eve…… -
Java – how to exclude object properties in GWT from serialization?
Is there any way to exclude the original and object properties in serializable objects from GWT serialization? public …… -
Java – dynamodb global secondary index with exclusive startup key
Can I specify an exclusive startup key when querying dynamodb table through global secondary index? I am using AWS Jav…… -
Is there a zero time start (no recompilation) switchable condition flag in Java?
I'm looking for a way to provide the fastest possible on / off flag for if conditions (I mean zero time - compile / cl…… -
Java – capitalize the first word in a string with multiple sentences
For example: String s = "this is a.line. Over" Should come out "This is a.line is. Over" I thought about using string …… -
Java get download progress
I'm writing Java applications (using NetBeans as IDE and JFrame forms), part of which is downloading files How do I up…… -
Java simpledateformat interprets the parsed string as UTC
My time zone is GMT 1 Therefore, the "date" object and "22.09.1985 00:00 UTC" print "Sun SEP 22 01:00:00 CEST 1985" on…… -
Java – how to create a modal jdialog over another modal jdialog
I have a mode setting dialog that is a jdialog In this setup window, I put some components (including a button) into a……