包含标签：Java 的文章
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Java – Functional Programming: how to handle exceptions or their equivalents in functional programming
Let's say I have the following code public int divide(int dividend,int divisor) { if( divisor == 0 || (dividend ==…… -
Java – the scanner did not scan my input
I'm trying to read a line and then enter the if statement But it will terminate after the first input of red import ja…… -
ActiveX from Java applications?
Can ActiveX controls be easily embedded in Java applications? Is it worth it In my next project, I should use existing…… -
Java – how do I access the configuration files in the jar?
I am using flatpack to parse and load data in flat files This requires loading the configuration file that stores the …… -
Java – why are variables allowed to be declared in a for loop?
I'm a student. I'm learning java at school. I'm confused about it That's what I mean: for (int i = 0; i < 3; i ++) …… -
Java – how to test e-mail logic using play framework
I found an extended mailer course and wanted to test it automatically Using a mock mail program, I can send mail to th…… -
Java – draw simpleweightedgraph on JPanel
I have a simpleweightedgraph that I want to draw on JPanel in JFrame I read this article They are using the listenable…… -
Unable to make Java program run! NoClassDefFoundError?
I am. Net developers, but for my current project, I need to use Google Caja, which is a java project Well, oh! On a Wi…… -
Java – find a simpler way to prime than this?
Is there a more effective, cleaner / more elegant way to find primes? The code works normally, but I just wrote some o…… -
Does adding a method to a Java class increase the memory usage of its instance?
Adding a member variable to a class will certainly increase the memory usage of its instance on the heap, but what abo…… -
Java – common types and performance
I wonder if the use of generic types in an application will have any (significant) degraded performance impact on the …… -
Java – viewpager is called actvity after completion.
I'm developing an application. I have to use viewpager. After all the projects in viewpager are completed, I have to c…… -
Java – unchecked transformation
I don't want to suppress the warning Is there another way to handle this warning? An expression of type iterator requi…… -
Rewriting conditional statements in Java
Suppose I have the following code, which basically determines some condition matches, then assigns Boolean values, and…… -
How to perform validation in JSF and how to create a custom validator in JSF
I want to perform validation in some of my input components, such as < H: inputtext > using some java bean metho…… -
Java 8 – filter lists in map values
I am writing a method that uses the input map in the format of map < term, list < integer > > One of the t…… -
Java – jodatime gets the current number of milliseconds from one day
I tried to get the current number of milliseconds from the beginning of that day So I want to do the following calcula…… -
Java – guava why is tostringfunction not a generic function?
Guava tostringfunction() has the following Declaration: public static Function<Object,String> toStringFunction()…… -
Java – view global / static / inherited variables in the eclipse debugger
This is a little trouble for me, rising When I debug the program, I can see the variables in the direct scope, but I c…… -
Java – access spring beans * through dependency injection instead of*
We have some domain objects created at runtime – not spring These domain objects need access to some service type bean…… -
Syntax highlighter for Java
As you know, there is a PHP syntax highlighter named Geshi, which supports a large number of programming languages or …… -
Java – integer range when using 64 bit JDK
As far as I know, there is a difference between 32 - bit and 2 - bit integers The 64 bits are as follows: I use the 64…… -
Java – Lucene performance
Can you suggest steps to follow for Lucene performance Especially big data (about 1TB PDF files should be indexed) Sol…… -
Multithreading – the sender becomes an actor [akka: / / main / deadletters]
I can't figure out why I made a mistake "dead letters" class MyActor extends Actor { private def getIdList = Future…… -
Java – play! Frame Create a new view
I created a new project using the playback console main.scala.html index.scala.html I want to add a new view file I…… -
Download files of unknown length over HTTP using java
I want to download HTTP query in Java, but the length of the file I downloaded is uncertain I think this is very stand…… -
Java – why does the program have an “illegal startup type” error?
This is a related code snippet: public static Rand searchCount (int[] x) { int a ; int b ; int c ; …… -
Find substrings in strings in Java
I'm writing a program to find substrings in strings in Java without using any Java libraries I wrote a function substr…… -
Java – loads drools / KIE workbench artifacts directly from the repository
We tried to switch to drools 6.0 using a new KIE workbench (formerly known as guvnor) and a new Maven based artifact N…… -
Because Java io. NotSerializableException：org. apache. spark. Sparkcontext, spark job failed
When I try to apply method (computedwt) on RDD [(int, arraybuffer [(int, double)])] input, I face an exception input:s…… -
Java – subtract the smallest number from several numbers
I have two numbers I want to subtract the lower number from the two values x: 1000 y: 200 => result: x = 800 and y …… -
Java – quicksort partitioning algorithm
I'm trying to write a quick sort algorithm using the cormen algorithm textbook Here is my code class Quicksort { p……