包含标签：Java 的文章
-
Java – make custom Parcelable with byte array
I'm trying to create a Parcelable class that contains an array of bytes public class Car implements Parcelable{ priva…… -
Java – ` public static void main (string [] args) ` what does it stand for?
What is public static? What does < x > void main (string [] args) stand for? I tried to understand, but I didn't…… -
Why doesn’t Java recognize my ArrayList with an overloaded constructor
I have two constructors set as follows: public XMessage(Information info,List<Object> results) { this.inform…… -
Use Java [Close] to find the index of the first occurrence of integer from the string
I have string xxxy 1 / 1 / 2. I need to use java to find the index of integer for the first time The output will be th…… -
Java – HibernateException: the proxy handle is no longer valid after the database violation error
I have a loop to hold several objects Invoke the service method in the loop and catch the exception. The service saves…… -
Java – arrange swing components by edge
Can swing components be arranged? You can see a subtle difference that I find very annoying I know that all jlabels [B…… -
Java – declaring class abstraction is a bad design because it has only static members?
My project has a class for loading external resources (i.e. images and audio files) This class has only a few members:…… -
Java – read multiple scanner inputs
What I want to do is have multiple inputs with different variables Each variable is part of a different equation I'm l…… -
How to determine whether there are available threads in the thread pool in Java
I try to get the task queue from the database table as quickly as possible, while limiting the number of threads proce…… -
java. Lang. illegalaccessexception: is it related to the public / private attribute of the class?
The following error occurred in my java code: java.lang.illegalaccessexception: Class org.apache.commons.digester.Obje…… -
Java – understand the terms “extension”, “component” and “plug-in” in XMPP?
Can anyone explain different "extensions", "components" and "plug-ins" in XMPP? Solution Protocol extension, component…… -
Java – why do derived class constructors always access base class constructors?
I saw this problem in a problem paper: Why do derived class constructors always access base class constructors? I wond…… -
What does javac – version show?
Even official documentation of javac Solution Javac - version tells you the JDK version That is, it provides informati…… -
Java is equivalent to Python’s string lstrip()?
I want to remove leading spaces from the string, but not trailing spaces - so trim () won't work I use lstrip () in Py…… -
Java thread, what is its answer?
The problem is from http://www.javacertifications.net/javacert/scjp1.6Mock.jsp start No problem - 20 What is the outpu…… -
Java – how does Tomcat recognize servlets specified with annotations?
Before servlet 3.0, you need to provide URL patterns and servlet classes in web Configure servlet. XML Whenever a requ…… -
Is memory allocated for unused fields in Java?
I want to know how memory allocation works in Java I have a class duck with two instance variables int size and string…… -
How to convert bytes in binary representation to ints in Java
I have a string [] with a byte value String[] s = {"110","101","100","11","10","1","0"}; Recycling s, I want to get th…… -
Java – get different JSON representations of the same object
Give a Java object serialized as a JSON string with Jackson Compression: { "a":"123","s":"100" } Or normal: { "alt…… -
java – BorderLayout. Vertical alignment of gridbaglayout panel on Center
What I want to do is to place a gridbaglayout panel in the center of my borderlayout and align the gridbaglayout panel…… -
java. Lang. IllegalStateException: you need to use theme. In this activity Appcompat theme (or descendants)
I received this error while trying to run my Android application Oddly enough: it only happens when Android applicatio…… -
STD:: sum of vector members C
I have sample classes: class Example { private: int testValue1; int testValue2; int testValue3; public: Examp…… -
Java – given a string, does “XYZ” appear in the middle of the string?
My solution works without the second line, except for one condition: if STR = "xYx" is it possible to modify the for l…… -
Java – Abstract generic class
I have the following courses: public abstract class Step { public abstract <S,T> S makeAStep(S currentResult…… -
How do I format a date range in Java?
I have two appointments - start and end I want to format them so that when the month matches, they will crash to a sta…… -
Loading and saving block – based games in Java XML or txt?
I have been making a sim game based on 2D tiles for some time, and everything is going well! Thank you for this websit…… -
Java – what type of encryption does 48 bit to 48 bit use?
I have a stack of 48 bit (6-byte) values and I need symmetric encryption These two requirements are: >The generated…… -
Java – contrary to C, why can’t you reduce method visibility when overriding?
See English answer > java, cannot reduce the visibility of the inherited method from object abstract class A { pr…… -
Java – how do I wait for CSS properties to change?
How do I tell selenium webdriver to wait on a specific element and set a specific attribute in CSS? I want to wait: el…… -
Too many Java – MySQL connections
I hate to ask a question that is widely asked on the Internet, but I can't seem to solve it I started a project after …… -
Java ThreadLocal singleton – what is it?
Laymen say, what does it mean when someone says that an object is a thread singleton in Java? I'm attending a lecture …… -
java – Arrays. Contains (int) error
May I ask why the following output is false? import java.util.Arrays; public class Test2 { public static void m……