包含标签：Java 的文章
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Multithreading – what is saved in context switching?
Precisely saves and restores content in context switching between two threads >In the same process > between two…… -
Comment – @ singleton in Java EJB
I have an EJB that needs to be single and stateful because it will become a connection pool My question is: >If I d…… -
Java – the easiest way to index a collection’s attributes, which are themselves a collection
I have a list < foo > and want a guava Multimap < string, foo > we divide each tag of their collection <…… -
Java me – how to create a browser window in J2ME?
How to create a browser component in J2ME that can display web pages in applications? Is there an API available? Or is…… -
How to separate lists by using conditions of Java 8 streams
Consider the following codes: List<Integer> odd = new ArrayList<Integer>(); List<Integer> even = nu…… -
Java – insert the row and get the generated ID
I am trying to use spring's jdbctemplate class to insert a row into the MySQL table named transaction and get the gene…… -
Why use negative int in toString method of integer class in Java SRC for mod operation
When I read the Java version of 1.7 0_ 09 source code, I found that the implementation of toString method of integer c…… -
Java – function method of thread safe shared counter
I am new to scala and functional programming. I like the idea of using immutable objects. I can avoid many thread safe…… -
Multithreading – can static arrays be safely accessed from multiple threads?
If each thread guarantees to read / write a specific subset of the array, multiple threads can work on the same (stati…… -
Does Java also test the equality of handling null values?
Is there anywhere in the Java standard library with static equality functions? public static <T> boolean equals(…… -
Java – spring boot: how to reference application. In @ importresource properties
My spring boot application has an ApplicationContext XML file In this file, it has an attribute placeholder – ${profil…… -
Java – ecobertura does not work properly in eclipse
So I tried to test the coverage of Java applications in eclipse I installed ecobertura from the "install new software"…… -
Java API interrupt
I have the following APIs: public interface MyApi { /** * Performs some stuff. * @throws MyException if co…… -
A problem about Java multithreading
Assume the following courses public class TestObject{ public void synchronized method1(){ //some 1000 line…… -
Java – when there is more data, the Jasper report exports empty data in PDF format
I have a report exported in Excel, PDF and word using Jasper report I use the XML file as the data source of the repor…… -
Java – how do I enable Maven profiles when the build version is not – snapshot?
I'm trying to use the gitflow helper Maven plugin extension for my Maven build Therefore, I want to configure my proje…… -
java – ASN. 1 encoding – decoding
I am currently developing a client server program, a client in Java / C and a server in C In this case, I realized the…… -
The best way to print simple reports in Java
I have developed a Java application, and now I want to provide some simple printing support Print invoices, reports, e…… -
Multithreading – reentry locking: advantages and disadvantages?
Under what circumstances do people want to use turn back locks and ordinary locks? Solution I think reentrant locks ha…… -
Variable fields of objects in Java collections
I correctly assume that if you have a field contained in the Java collection & (or as a key in the map about the t…… -
Execute diff in Java
I am looking for diff implementation in Java I see Python has its own sequencematcher (with difflib), which is exactly…… -
Java – spring application startup error: source cannot be empty
I'm following the spring tutorial and the following error occurred when I tried to start the spring application: What …… -
Java – manage JAXB generated classes in the Maven project
I have a maven based project in which I try to add some JAXB classes automatically generated by the "jaxb2 Maven plugi…… -
What is the c# equivalent of a calendar in Java?
I am converting java to c# and need to convert code involving calendar: Calendar rightNow = Calendar.getInstance(); St…… -
Java – files cannot be accessed from Src / main / resources through test cases
I have a file in Src / main / resources dat. When I try to test a class that loads the file through a jar file, the te…… -
Java – set the hours, minutes and seconds to 00 in zoneddatetime or instant
I have a date string in UTC format – String dateStr = "2017-03-03T13:14:28.666Z"; I want to convert it to the followin…… -
How to in Weblogic 10 Enable JMX on X
I have a JMX enabled application It has its own JMX proxy and some MBeans When I start an application in Weblogic, I c…… -
Java – is writer an atomic method?
I want to write some strings to the file Therefore, I use the bufferedwriter class Since many threads tend to write to…… -
Java – can I tell bufferedimage what the original file type is?
In my code, I have a bufferedimage loaded with the imageio class, as shown below: BufferedImage image = ImageIO.read(n…… -
Java – why toolkit getDefaultToolkit(). Beep() does not work in windows?
When I try to use toolkit getDefaultToolkit(). When beep() beeps, it doesn't seem to run on any of my windows computer…… -
RX Java – the difference between interval() and repeatwhen() for polling from observable in the interval
What is the difference between: Observable<String> observable = Observable .interval(0,1,TimeUnit.SECOND……