包含标签：Java 的文章
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Java – why is this non greedy regular expression more than I want?
I think it should return to "state, country", but it is returning to "country" System.out.println("city,state,country"…… -
Java: trying to get the percentage of integers, how to sort it out?
I have two integer values, X and the sum I tried to find the percentage of total X That's what I'm doing now: Percenta…… -
java – Math. How does random () generate random numbers beyond the “native” range?
As far as I know, math Random () itself generates random doubles between 0.0 and 1.0, including 0.0 but not 1.0 I also…… -
Java – exception: add a window to the container How?
I have a jdialog class called preferences This class creates a constructor, such as: class Preferences extends javax.s…… -
JavaFX Maven plug-in and API are incompatible
I recently upgraded my java version to 7u40. 0 on my Fedora 19 Then I started to make a nasty mistake in the JavaFX pr…… -
Java thread pool
I want to learn how to write a thread pool in Java Can anyone point out my useful resources? Solution You can view the…… -
Is there any way to make the constructor return a = = null object in Java?
I have a feeling that the answer is "no", but I think I'll ask just in case Pseudo code: Foo foo = new Foo(); if(foo …… -
How to modify the final StringBuffer value after creation in Java?
I know the final variable characteristics It cannot change from its initialization state however How is StringBuffer d…… -
Java – why do we have to declare dependencies on the JBoss 8 (wildfly) manifest?
The following ear is given: > my-app. ear > my-ejb. jar > my-webapp. war > lib > my-lib. jar My EJB nee…… -
A list of all binary combinations of numbers in Java
I'm working on a project involving "dynamic programming". I'm shocked by this trivial thing. Please help Suppose I tak…… -
Java integer ArrayList returns elements in a specific range
I have an integer Java ArrayList ArrayList <Integer> ageList = new ArrayList <Integer>(); I have some int…… -
What is the scope of Java variables in the block?
See English answers > why does Java not have block scoped variable declarations? 6 void foo(){ int a = 0; f…… -
Java – why mockito returns_ Default does not return the default string?
In the following example (mockito 1.10.19): MyClass myClass = Mockito.mock(MyClass .class,RETURNS_DEFAULTS); Strin…… -
Java – is there any reason to always use objects instead of primitives?
So I just started to write the second programming class in Java. This is an example that the professor showed us loops…… -
Java – hex color to RGB color
I have a decimal (non hexadecimal) color code. Using Java, I need to convert it to three RGB colors For example, 16777…… -
Java – excludes folder names from eclipse file searches
How do I exclude a folder name from eclipse file search (ctrl h)? For example, if I want to search all files but exclu…… -
Java – one to many one-way parent-child ID cascade saving
When I try to save the ID from the parent class to the child class, I keep getting errors I tried all types of mapping…… -
Java – repeated input errors when using POI with gradle
I started a project that needed the Apache POI library I pasted them in my build Everything seems to be fine in the gr…… -
Java – use Jackson JSON parsing to convert true or false to Boolean values
I'm using the Jackson annotation to parse the JSON response into a POJO object I use Boolean variables in POJO to map …… -
java – Restlet Protocol. File usage
I have an example about protocol in the restlet site Problems with file usage // URI of the root directory. public sta…… -
Writing custom Java objects to parquet
I have some custom Java objects (internally composed of other custom objects) I want to write this to HDFS in parquet …… -
Cause: javax net. ssl. SSLHandshakeException：java. security. Cert.certificateexception: there is no x509trustmanager implementation (spring) in Java
I'm trying to verify that I have a server certificate. I've created a keystore and trust store The exception occurred …… -
Java – error R10 (boot timeout) – > the web process cannot bind to $port – heroku within 60 seconds after startup
I'm trying to deploy my server on heroku I received this error: Error R10 (Boot timeout) -> Web process Failed to b…… -
General Java questions about interfaces
Consider that I have a method that passes list as a parameter In this method, I want to use a specific function such a…… -
Playframework – cause: javax persistence. Entitynotfoundexception: bean deleted – deferred load failed
Edit: additional information: play.api.Application$$anon$1: Execution exception[[EntityNotFoundException: Bean has bee…… -
java – String. Error in replaceall() function
I'm trying the following code: – String x = "asdfg/dgws"; x.replaceAll("/","\\"); But it was a failure This gave me th…… -
Java – ternary operator does not work
NetBeans says my ternary operator is not a declaration How? int direction; direction = (Math.random() < 0.5) ? 0 : …… -
Java – InputStream closed by imageio
I encountered a very strange problem with imageio Some objects in my java program have an image I use the static metho…… -
About classes extended from base classes (Java)
I am a beginner of Java, trying to write a party task system for the game I am writing. I have a few questions I want …… -
Java – prime factorization of large numbers
I want to find the prime factorization of large numbers less than 10 ^ 12 public static List<Long> primeFactors(…… -
Why does the java compiler complain that local variables are not initialized here?
int a = 1,b; int a = 1,b; if(a > 0) b = 1; if(a <= 0) b = 2; System.out.println(b); If I run this, I receive: Ex…… -
Java – to in Oracle_ Display time zone description in char()
I have an SQL query select to_char(cast(sysdate as timestamp with LOCAL time zone),'YYYY-MM-DD,HH24:MI:SS TZR') from d……