包含标签：Java 的文章
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How do I check the Windows version in Java?
I want to check the Windows version in Java (basic or home or professional or business or other) What should I do? Sol…… -
Java – use Guice injection and actor to throw null pointers
I get a null pointer exception on the field injection of the server, which starts as an akka actor Plan part: private …… -
Java – Amazon S3, how to check whether the upload is successful?
I wrote a short test code in Java to upload the PDF file generated in memory In this test code, I only use a virtual b…… -
What is the important idea behind the Java – AOP implementation?
I want to make it clear to me I read the concept of AOP and I understand that it is a good way to share cross domain s…… -
Java – GWT – unable to get type signature of class
I am developing an application GWT, which can search files on different servers I have my search code in the server pa…… -
The difference between equals and colons in Java properties files
In spring, you can use different property files to configure messages, so they are often like this: message.key=text h…… -
Java – finds the sum of numbers in the array – excluding the number 13 and the number after it
I want to write a program in Java, give an array and find the sum of all the numbers in the array - with one exception…… -
Java – xssf how to get any strings
I try to use Apache poi xssf to parse Excel files into XML cell.getStringCellValue() It throws an exception because it…… -
Java runtime error “non terminating decimal extension; no exactly representable decimal result” in BigDecimal class
When I choose "positive incorrect integration" or "negative incorrect integration", it gives me a mistake at java.math…… -
Java – how to use the custom JTable cell editor and cell renderer
I have created a JTable with custom table rendering and custom cell editor, which can give the results in the image I …… -
Java – how to improve efficiency?
I'm creating an asteroid clone, but there are still some bells and whistles So far, I have an ArrayList < < aste…… -
Java – why does the enummap constructor need a class parameter?
The enummap class constructor requires a class as an argument Most of the time, k.class is passed as a parameter I sti…… -
Java 8 applies stream filters based on conditions
In Java 8, is there any way to apply filters to streams based on conditions, example I have this stream if (isAccessDi…… -
Java – spring throwing httpmediatypenotacceptableexception: an acceptable representation cannot be found due to a point in the URL path
Final editing So after research, because the answer is not because of what I see, I found that spring does some strang…… -
Java – how to use ant to check signed jar files?
I use ant signjar task to sign the jar file, and now I want to test it before deployment I can check jarsigner -verify…… -
Java – Maven assembly plugin mojoexecutionexception, where dependencyset is outputdirectory
In my Khatami project, I use Maven to manage compilation and package the results into a runnable artifact: the top-lev…… -
Java – set column headers in JTable
I have the following JTable table model: http://s17.postimage.org/7zfh3l4lr/Screen_Shot_2012_03_10_at_15_11_31.png Ins…… -
Java – completable future | then apply vs thenpose
I can't let my head revolve around the difference between thenapply () and thenpose () So can anyone provide an effect…… -
Java – type mismatched keys from the map: expected Text,received … LongWritable
I have a simple Hadoop application that takes a CSV file, splits the entries with "," and then calculates the first it…… -
Java – how to repeat the “if” statement when the output is false
I'm developing a simple game where users have to guess a random number I've set up all the code except the fact that i…… -
Java – how to set the background color of custom button status?
I have a button that contains drawable and text I hope the background of the button is different from the normal backg…… -
Java – confused about ThreadLocal
I just learned about ThreadLocal this morning I read that it should always be final and static: private static final T…… -
Java – namespace in JDOM (default)
I'm trying to generate XML documents using the latest JDOM package I encountered a problem with the root element and n…… -
Java – how to sort vectors?
In Java, I want to know how to sort vectors on a specific column. One vector is used as a row and one vector is used t…… -
Java – what is the correct way to create a completed completable future
I use completable future in Java 8. I want to write a method to run multiple tasks with side effects in parallel accor…… -
Java – invalid sort on date in JTable
Look at the code below import java.awt.*; import java.awt.event.*; import java.text.NumberFormat; import java.text.Par…… -
Java – is there a case where the abstract class is better than the interface
I have a scenario in which several subclasses have similar implementations and some additional methods, and the implem…… -
Java instance: supertypes and subtypes seem equal? How to accurately test type?
If an instance completely belongs to a given type, I need to test it However, if the subtype is tested as a supertype,…… -
Get Java classes from multiple wsdls
I have a maven project where I need to generate Java classes from multiple WSDL files I have checked this link: http:/…… -
Java – use a specific pattern to format an instant as a string
I'm trying to format instant as a string using a specific format According to the question of format instant to string…… -
Java – stores serializable objects in the database
I'm writing an application that needs to write objects to the database For simplicity, I want to serialize objects But…… -
Java – regular expression in spring controller
I'm trying to build a request filter that will only be used if it matches the pattern of the letter E and then a numbe……