包含标签：Java 的文章
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Java HashMap detected a collision
Is there a way to detect collisions in Java hash maps? Anyone can point out that there are many collisions where some …… -
Java – volatility of reference types – does it always avoid publishing references due to JMM?
Suppose this lesson: public class AmIThreadSafe { private int a; private int b; AmIThreadSafe(int a,int …… -
How to add JDBC Properties to spring / Hibernate?
I encountered the following error when trying to pass the value from the properties file to spring, so I don't have to…… -
Occurs before the relationship in the JAVA memory model
With regard to JLS ch17 threads and locks, it says "if an action occurs before another action, the first action is vis…… -
Java – continue statement marked in the while loop
The following simple example causes compile - time errors But it is not clear why public static void main (String[] ar…… -
The Java synchronization thread did not work as expected
The following code does not work properly: import java.util.ArrayList; import java.util.List; import java.util.Random;…… -
Java shutdown function not executed
In main () of my application, I have the following code to back up the data so that it will not be lost when the syste…… -
Confirm the Java LinkedList “foreach” loop
nice day, Someone can confirm the content at the bottom of the Java – iterating a linked list post. The post mentioned…… -
Java – there is no bean named ‘sessionfactory’ defined after opensessioninview filter
Well, because lazyinitializationexception, I need it on my web Add "opensessionviewinfilter" in XML and use the follow…… -
Java – why doesn’t implicit conversion happen here?
I'm looking to convert a char array to a set of characters Logically, if I write something like how to convert an arra…… -
Java – throw multiple exceptions from a method
How to throw multiple exceptions from one method at a time? Example: public void doA() throws Exception1,Exception2{ …… -
Java – immutable classes and subclasses
I'm trying to learn variable / immutable classes. I met this post Some of the answers provided are: @ h_ 419_ 3@ OK, I…… -
Java – asynchronous HTTP client (ning) create more threads?
I am using Ning async HTTP client to realize the advantages of non blocking Doing an apple to Apple test (non blocking…… -
Java – inherited protected member behavior
I have some questions about the protection identifier In the first chapter of K. Sierra's sun certified java programme…… -
Java – you cannot deploy a simple spring boot web application to openshift
I have one War file. When I copy it to the webapps folder in my local instance of Tomcat 9, it will be successfully de…… -
Java – pass variables from servlet to JSP
I have seen other problems similar to this problem, but none of them helped me solve my problem Basically, I'm trying …… -
Java swing JFrame size returns a larger screen size
When investigating some problems in my application, I found something strange Basically, the sscce should prove this p…… -
Java – spring managed transaction, eclipse link JPA, custom isolation level
I doubt it's embarrassing. I made a mistake in a terrible way, but please wait for me patiently I have a spring applic…… -
Java – JSF 2.1.0 not found 13 custom component: tag library supports namespace: but no tag is defined for Name:
problem I am using JSF 2.1 Create a prototype to demonstrate the benefits of JSF to the webapp we currently build usin…… -
Java 8 maps the collection. If the collection is empty, add the default value
I have a use case, and I must return a set containing at least 1 element The incoming collection may contain 0 or more…… -
Java – pdfbox coded symbol currency euro
I use Apache PDF@R_745_2419 @The library creates a PDF document My problem is to encode the euro currency symbol when …… -
Vector – what is the correct way to convert VEC to FFI without reallocation?
I need to pass an element VEC in the FFI Through the experiment, I found some interesting ideas I started to give the …… -
Java – thread interrupt: will it cancel receiving the wait () call?
I have a thread that has an incoming job queue (a LinkedList containing job descriptions) When no task can work, the t…… -
Java – can I programmatically detect whether there are any chromecast devices on the current WiFi network?
Whether you can detect whether there are any chromecast devices on the current WiFi network I've seen a cast SDK, but …… -
How to make static methods thread safe in Java?
I'm creating a web application and I'm experiencing thread safety issues After reading several similar questions, I am…… -
VHDL test results are converted to JUnit (or other Jenkins approved) format
I am setting up automatic regression testing for FPGA projects, almost entirely as follows: > Continuous integratio…… -
Java – delete items from the list or add build new list?
Usually, I have to iterate over an ArrayList and want to create a subset from it based on any condition From a perform…… -
Java – how to quickly load large txt files into BigInteger?
I'm importing a large 17 million bit text file. I'm using this Code: BufferedReader reader = new BufferedReader(new Fi…… -
Java – bufferedinputstream and blocking
I'm using bufferedinputstream to read from the socket The contents of bufferedinputstream are as follows: socketInput.…… -
Java – handling interruptedexception (error in Android?) while waiting for an exit signal
I've seen the following code, and I want to know if it's really what I think: synchronized(sObject) { mShouldExit …… -
Java – comparison of two empty objects of two different types
public void m1(Integer f) { public void m1(Integer f) { ... } public void m1(Float f) { ... } public void ma…… -
Stop the running process through the GUI in Java
I have a GUI program that executes TestNG automation scripts This means that users can easily configure certain settin……