包含标签：Java 的文章
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Java – vector vs ArrayList performance test
Everyone said that vectors should be used because of performance (causing vectors to synchronize after each operation …… -
Java – a better way to create AES keys than secure random
I need to send encrypted data from the Java client to the c# server Now I'm learning how to encrypt data using AES Acc…… -
Determine whether the document is doc or docx in a Java application without knowing its extension
There is a constraint in the content management system that requires all word documents with a specific extension to b…… -
Java converts GIF images to PNG format
I have to build a java servlet to receive images and return images converted to PNG format How can I do this? Thank yo…… -
Java – how to send a post request and get a file response?
I want to send post requests (such as HTML forms) and get files (HTTP Title: "content disposition: attachment; filenam…… -
Java – when the enumeration type reference is class How do I convert a string to an enumerated value?
I have code to set values on objects using the setter method One of the setters takes enum type as a method parameter …… -
Error message: “when debugging PHP with Xdebug and eclipse, the script is terminated unexpectedly, and debugging is over”
I encountered the following errors while debugging: PHP. Ini settings: xdebug.remote_enable=true xdebug.remote_host=l…… -
How to insert big integer in Java preprocessing statement
I want to insert a large integer value using preprocessing statements. I have a string variable named XID (41527820021…… -
Setting an instance in Java?
Java defines a set interface, where contains() is defined as follows: The collection interface defines contains() as f…… -
Java extending class containing main method
I use the following code as part of my assignment class Base { public static void main(String[] args){ System.ou…… -
Java – spring launch security configuration – AuthenticationManager must be specified
This is my main application configuration @SpringBootApplication public class Application { public static void ma…… -
How to convert comma separated string to ArrayList in Java
See the English answer > how to convert comma separated string to ArrayList? 23 import java.util.ArrayList; import …… -
How big is the Java – integer cache?
The class integer has a cache that caches integer values So if I use the method valueof or in@R_633_2419 @Ing, the new…… -
Multithreading – waiting for any given future in scala?
Suppose I need to perform some parallel tasks in scala Each task performs some blocking calls (for example, process. W…… -
Using listproperty in JavaFX
I defined a class that contains a list I tried to initialize the list in the constructor with the transport list: publ…… -
Check whether there are files or directories in Java
This java tutorial from Oracle: Why are they different? It has no further explanation Does anyone know more about it? …… -
Java – stores serializable objects in a file, but does not include some data
I have an object that allows me to store buffered image in my target file In the same object, I have the bufferedimage…… -
Assign int to byte in Java?
int val = 233; int val = 233; byte b = (byte) val; System.out.println(b); I have a simple example: I have an integer w…… -
Object array, the difference between Java and C
I'm new to C. I'm porting a java project to C Consider the following java code, where piece is a class representing ch…… -
Java: scheduling tasks at random intervals
I'm new to Java. I'm trying to generate a task that runs every 5 to 10 seconds, so any time interval between 5 and 10,…… -
Java – sort the (array) list in a specific order
I have a list of objects that I want to sort in a defined order Before sorting: After sorting: orange …… -
Tricky Java programs
Look at the following code, please help me solve this problem class TestTrick{ public static void main(String arg…… -
How to read comma separated values from text files in Java?
I have this text file, which contains the latitude and longitude values of different points on the map How do I divide…… -
How to use webdriver selenium to get the value of the “style” element
I want to check whether the value of a style element is greater than a specific value (that is, is it > 666px?), Bu…… -
Java – eclipse generates getters / setters for domain objects and class members with’m ‘suffixes
I have a small problem with the getter and setter methods generated in my domain object class User{ String mName; List…… -
Java – print the inversion of any string without using any predefined functions?
How to print the reverse of string Java is an object-oriented language without using any predefined functions, such as…… -
Can I write variable names with hyphens in Java?
I use gson in my application I have the following JSON responses: { "success":true,"person-name": "John" } So I'm cr…… -
java. Lang. class and equal
According to the Javadoc of the class But when I ran down there int[] intArray = { 1,2 }; out.println(intArray.getClas…… -
Java observer and observable do not work properly between applications
I have an application that contains the main JFrame of the default list model I hope that if I modify the contents of …… -
Java – mockito: how to test that a constructor is called?
I'm using mockito to test methods in Java applications How to test that the constructor is called once? I'm trying a s…… -
Java – JIT optimization and weak references
I have the following code: private final List<WeakReference<T>> slaves; public void updateOrdering() { …… -
Java – set the most important bit by bit
I want to find the most important bit set to 1 I've tried all possible ways from & oring all bits from 1 to 31, it……