包含标签：Java 的文章
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Can Java string literals be garbage collected? If so, how to prove it?
Can Java string literals like "ABC" be garbage collected? If so, how can we programmatically prove that they are GCed?…… -
Java – get localdatetime from seconds, including time zone
I have time from our computer "day 0" (at midnight on January 1, 1970) in a few seconds. I want to convert it to a loc…… -
Java – eclipse debugger does not stop at a conditional breakpoint
I have this java code in eclipse and I want to debug it This is the code: public Double repulsion(Node n1,Node n2) { …… -
In Java Correct method of setting read-only path in NiO 2
I'm confused... According to this Java page file The setreadonly() function is now a "legacy" function and should be c…… -
java. nio. file. Nosuchfileexception: why NiO did not create a file
I'm using Java nio. File package and try to create a file using the following code private static void printReport(Str…… -
Java – there is no OpenGL context in the current thread
I'm following the tutorial on youtube, but I've encountered an OpenGL problem that I can't solve I don't know how to s…… -
Java – SQS expiredtoken: the security token contained in the request is expired status code: 403
I have a long - running worker process running on EC2 that uses items from the SQS queue After some time (8-12 hours, …… -
Java – how do you ensure that spring @ EventListener is called first?
When implementing the applicationlister interface, there is an option to implement ordered to specify the call order S…… -
Java – undefined behavior
I did some simulations on C and I encountered a strange problem I have the following function to return the vector of …… -
Embedded wharf java. lang.IllegalStateException：！ STOPPED
I tried to make a simple servlet in an embedded jetty container public class Application { public static void main(S…… -
Java – obtain the currently logged in user from the spring angle
I use spring security in the spring boot application. I want to get the currently logged in user from the principal #g…… -
Unable to run program “…” error = 2, no such file or directory (Java)
I'm trying to create a java program that will set up an SSH connection for me on my MacBook It prompts me for a user n…… -
Comparing “queue” objects in Java
I am currently studying the properties of the queue interface and encounter the following declaration in Java document…… -
Java – gradle build error (Android studio 2.2.2)
I installed Android studio 2.2 with the necessary packages on Debian Jessie 2 and check for updates When the gradle bu…… -
How does Java 8 pass non functional methods as parameters
See English answers > java pass method as parameter 15 Class SimpleClass { methodA(var1,var2) { //body …… -
Database – Java multiple database connections in UserTransaction
static void clean() throws Exception { static void clean() throws Exception { final UserTransaction tx = InitialCont…… -
Error creating bean named ‘application’, unable to find default constructor; The nested exception is Java lang.NoSuchMethodException
I don't quite understand why this code gives me the error "can't find the default constructor" The constructor is @ Au…… -
How to replace two loops with a stream and keep the same elements in the list
Set <ShipperModel> shippers = baseSiteSerivce.getCurrentBaseSite().getStores().get(0).getShippers(); Set…… -
External parameters referenced by methods in Java 8
I want to pass external parameters to method references: String prefix = "The number is :"; numbers.forEach(Main::prin…… -
Add a table with borders for each cell in Javadoc
I know I can use HTML tags in Java documents How do I add a table with borders for each cell? I want the cells to alig…… -
How to convert a list into a map in Java 8 Map function in chain
See the English answer > java 8 grouping using custom collector? 3 class Passenger { String type; String firs…… -
Java – localdate cannot resolve ‘WW’ using ‘yyyy’
I must parse the date in the following format: "201710", in which the year number of 10 weeks I try to achieve it in t…… -
RX Java – create an observable by combining other observables, and issue events from the first sampling
When one is an infinite data source, I need to combine two observers, and the other is an indicator that obtains the l…… -
JavaFX: when tabed to the textarea, place the insert / cursor at the end of the textarea
(searching on stack overflow, I see that this problem is aimed at JavaScript rather than JavaFX) I have a textarea tha…… -
Java – * and * * differences
*What's the difference between and * *? Why** When using pattern Did not compile when compiling (". * *");? Solution S…… -
Java – Android: reverse the position of recyclerview
I'm setting up a recyclerview like a list. I want to have a button at the bottom of the list to add more views when cl…… -
Convert from swing to JavaFX?
When converting a swing project to a JavaFX project, which classes in JavaFX match the swing class? 1 - 1 is the best …… -
The Java size() function does not work in Processing 3.0
I tried to set the window size by passing parameters from image width and height in Processing 3.0 However, processing…… -
How to draw arrow JavaFX? (pane)
I need to make a directed graph from undirected I can draw line edge, but I don't know how to make arrows: public clas…… -
Java – what is notifyitemrangechanged (0, this. Data. Size()); How does it work in this example?
I understand how the onbindviewholder of viewholder works, but I don't know how notifyitemrangechanged (0, this. Data.…… -
Java – code in public static void main, or use code to call another method in main?
In the tutorials on the Internet, I often see code fragments in public static void main (String [args]), while my prog…… -
Java – error defining bean named ‘entitymanagerfactory’ in classpath resource
The following error occurred while running the spring application I'm very new in spring, so I'm very sleepy here Need……