包含标签：Java 的文章
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Java – when should I use inputstreamreader and outputstreamwriter?
From the Java Tutorial site, we know that inputstreamreader and outputstreamwriter can convert streams between bytes a…… -
Java – hibernate criteriabuilder connects multiple tables
I'm trying to add four tables using hibernate criteriabuilder @Entity public class BuildDetails { @Id private …… -
Java concurrency JDK 1.6: is busy waiting better than signaling? Valid Java #51
Item 51 of Joshua Bloch's "effective Java" does not depend on the thread scheduler, nor does it unnecessarily retain t…… -
Java – spring 5 – how to provide static resources
I'm trying to provide static resources in my web application. I've tried: @SuppressWarnings("deprecation") @Bean WebMv…… -
Java – property of type not found in JSF
I tried to invoke an attribute using primefaces in JSF. But I have the type managedbean Error 500 not found on persone…… -
Java – how to read BufferedReader two or more times?
I have a text file, one integer per line – 10 20 50 I want to read and print these numbers twice or more I tried some …… -
Java – optimistic locking and org hibernate. StaleObjectStateException：
I'm just trying to be optimistic I have the following courses: @Entity public class Student { private Integer id;…… -
Java – spring: how to get application context in webapp and standalone programs
I'm new to the spring framework We want to introduce it into the web application (3.1). At present, we use struts in t…… -
How can I find where bufferedimage uses alpha in Java?
I have a buffered image and a Boolean [] [] array It's like: for(int x = 0; x < width; x++) { for(int y = 0; y …… -
Java – is there any way to use secondarytable to jump multiple tables?
Suppose I have a main user table named userprofile and a display name I have various modules. You can use userprofile …… -
Java – sonar flag “bad practice”: if the class is extended, it may not be safe to use getresource in XYZ
Sonar pointed out this error in our java project Welcome any suggestions on safe programming! URL url = getClass().get…… -
Is the Java multicastsocket thread safe?
I have two themes It seems to work normally, but I still doubt it Can these two threads use the same multicast socket …… -
java. lang.NoSuchMethodError：javax. servlet. http. HttpServletRequest. startAsync
Do you know why I encountered this error at runtime? java.lang.NoSuchMethodError: javax.servlet.http.HttpServletReques…… -
Use classpathscanningandidatecomponentprovider with multiple jar files?
I am looking to use classpathscanningcandidatecomponentprovider to find subclasses of specific classes in my JVM What …… -
Use the start process and wait commands in PowerShell
I'm new to power shell. I don't have much programming background. I just try to use it for software packaging Anyway, …… -
Java – why get base class methods through reflection when subclasses override them?
I have super classes: class MyClass<T> { public void setValue(T value){ //insert code } public T getV…… -
Java allocated memory leak
I must assume that the following methods do not leak memory: public final void setData(final Integer p_iData) { da…… -
Java – hibernate bi directional many to many association creation duplication
My question is very similar to the hibernate bi directional manytomany updates with second level cache I have class, a…… -
Call mongodb function from Java
I'm trying to call stored JavaScript functions from the mongodb Java driver I have been following this guide to store …… -
Java – identify swing components on specific screen coordinates? (and manually schedule mouseevents)
I'm working on some Java applications that are compatible with alternative input devices Unfortunately, the device in …… -
Java – how to avoid instanceof when using list in design pattern
Imagine that you have a menu and each dish should be in multiple languages (French, English, Arabic...) The dish class…… -
Java – three questions about doing a lot of computing
This is just a series of questions about doing a lot of calculations Either I can't find the answer online, or I need …… -
Java – how to create a generic type safe HashMap by class type?
See English answers > java map with values limited by key's type parameter5 Later, I want to pass the class type an…… -
Java – should I override the hashcode () of the collection?
Given that I have a number of courses that cover a variety of areas: class MyClass { private String s; private…… -
A filled list with an empty vector causes its length to change
In the following code, I expect something of length 96, but I get a list of length 48 Can you explain the result? num_…… -
Java – log in and play non blocked?
Log in to play non blocked? Does it use some non blocking IO APIs behind the scenes? Is it scheduled in some other thr…… -
Randomize text files read in Java
I try to read a text file in Java, which is basically a set of problems There are four choices and one answer The stru…… -
java. Lang. internalerror: callersensitive comment expected in frame 1
In a static method (annotated with @ callersensitive), I try to get the name of the calling class: @CallerSensitive pu…… -
Java – jeooq does not generate Dao with flag set to true
I have refreshed my project, rebuilt it cleanly, searched for similar problems in stackoverflow with Google, read the …… -
Is there any way to use typescript in my code Collections. HashTable？
I saw the implementation of "hashtable" in the code of typescript compiler (in the file Src / compiler / core / hashta…… -
Java – tag interface
Can anyone explain the contract of marking interface in Java? For ex: if clonable is a tag interface without fields / …… -
Java – use graphics2d to draw images with sub-pixel precision
I'm currently trying to draw images on the screen at normal speed, just like in a video game Unfortunately, due to the……