包含标签：Java 的文章
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Java – random and uniform distribution
I know that if I use the random generator in Java and generate numbers with nextint, the numbers will be evenly distri…… -
Java – what is the difference between length and length?
See English answer > length and length () in java7 arrayone.length; However, for things like array lists or strings…… -
How to get the root node attribute on Java
I have an XML file, as shown below I want to get the latitude and longitude attributes of the pharmacy node I can get …… -
Datetime – dome minutes using java 8
So I was lucky to use Java 8 and the new time API, but I didn't see any rounding function Basically, if the time is 20…… -
Java – spring security and LDAP authentication
I'm trying to set up LDAP authentication. This is my spring security XML file: <?xml version="1.0" encoding="UTF-8"…… -
Nesting enumerations in Java
I want to nest some enumerations The object I represent is flags, with type and value There are discrete types, each w…… -
Java – why does one loop throw a concurrentmodificationexception while the other does not?
I encountered this problem when I was writing a travel salesman plan For the inner loop, I tried one for(Point x:Array…… -
Cassandra Java driver: how many touchpoints are reasonable?
In Java, I connect to the cussandra cluster as follows: Cluster cluster = Cluster.builder().addContactPoints("host-001…… -
Java – why (long) 9223372036854665200d give me 9223372036854665216?
I know the strange things of precision error, but I can't understand it, Why did the (long) 9223372036854665200d give …… -
Java – hibernate noob fetch join problem
I have two classes test2 and test3 Test2 has a property test3, which is an instance of test3 In other words, I have a …… -
Java – mockito style anyxxx unit test method
When unit testing some methods, some situations may occur. The value of some parameters is not important and can be an…… -
Java – sipdroid – another incoming call is not displayed, while another continues
I have installed sipdroid I made three accounts in sip2sip The question is: if I use SIP to call the same phone multip…… -
How to determine whether a Java class implements a specific interface
I'm trying to use reflection to determine whether the incoming class implements the iswdidget interface: public boolea…… -
Java – how to create a specific date in HSQLDB?
I need to create a high date in HSQLDB. The solution does not include me I need something similar Date(9999-12-31 0:0:…… -
Java – write a mat file instead of MATLAB header files and libraries
I have some data that I want to save to mat file (version 4 or 5, or any version for this) Capture: I don't want to us…… -
How to extract dates from UUIDs using Java?
How to convert UUID to date format 2011-04-22? For example, I have such a UUID 118ffe80-466b-11e1-b5a5-5732cf729524. H…… -
Java – ArrayList warning- warning:[unchecked] does not select Add (E), nor does it run the file. Please help?
I've been trying to make this code feel like an era at this stage It is to calculate prime numbers in a range, and I h…… -
How to use java code to find the distance between two Zipcodes?
My request is similar to this question, except for the fact that I am prohibited from using latitude and longitude val…… -
Java – delete elements from copyonwritearraylist
I received an exception when I tried to delete an element from copyonwritearraylist using an iterator (from http://dow…… -
Java – how to get offline tokens and refresh tokens and automatically refresh access to Google APIs
I am developing an application that uses oauth2 and Google client library (located in appengine and GWT btw) to access…… -
Using javax Tool for cascade memory compilation
Eclipse's JDT compiler provides an interface inameenvironment, which defines the method findtype (...), enabling you t…… -
Sparksql and explode on dataframe in Java
Is there a simple way to use array column explosion on sparksql dataframe? It's relatively simple in Scala, but this f…… -
Java – HashSet adds duplicate entries, although hashcode() and equals() are implemented
I have the following categories: class Point { double x,y; // .... constructor and other functions here …… -
Java – how to resolve conflicting attributes if multiple profiles are activated
Maven profiles documentation does not mention this, which may be a sign of wrong design in the construction process, b…… -
Java – convert a triangle to another triangle
Hi, I'm trying to create an affine transformation, let me turn one triangle into another I have the coordinates of two…… -
Java – why does TreeSet throw ClassCastException
In the following code, I try to add two employee objects Set<Employee> s = new TreeSet<Employee>(); s.add(…… -
Is the Java – VIM editor smart?
I program in C or Java So I want to use the VIM editor because it is very flexible I heard I can configure the VIM edi…… -
Java anonymous classes and synchronization and “this”
I'm dealing with a competitive condition that I believe in my java GUI I have some methods to create an "anonymous met…… -
Java: the difference between collections and “data structures”
In Java, I don't understand the relationship between sets and "data structures" In my opinion, set refers to list, set…… -
Java – Tomcat can’t find my servlet and throw an exception, but why?
I tried to get into Java Web development, but it seems to be running into a strange problem with Tomcat and a very sim…… -
@Elementcollection Java persistence (hibernate) causes duplicate instances to be loaded
When @ elementcollection is used, multiple instances of all objects being loaded are loaded More specifically, it is l…… -
Is there a quick way to convert Java XML objects to scala XML objects?
Scala has its own XML library and provides built - in support However, one of the main features of the language is cal……