包含标签：Java 的文章
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Java – is this too much refactoring?
I try to refactor the code so that it will use a separate method to do some calculations Just to make it clear What I …… -
Java – how to add elements to the end of an array?
I want to know how to add or append a new element to the end of the array Is there a simple way to add elements at the…… -
Java – Maven resources plugin: 2.6 – unable to create resource output directory
So I just created a Linux instance from EC2, and now I'm trying to install AWS Java SDK on it At the end of the instal…… -
Java – what is the best way to handle invalid CSRF tokens found in requests when a session times out in spring security?
I am using spring MVC / security 3 10. The problem is that whenever the session times out, I get 403 on the login page…… -
Java – how do I get exclusive access to certain session entries?
Due to the remote invocation feature of rest services, they are in a state of constantly becoming competitive conditio…… -
Java – hamcrest matcher compares the double value of JSON
I am using the hamcrest corematcher class as part of the spring test integration test My JSON looks like: {"data":[{"d…… -
Java – use GlassFish Library in proprietary software
I want to use some parts of GlassFish in a proprietary software licensed under CDDL gplv2 Am I allowed to do this? I d…… -
Java – eclipse autocomplete does not apply to lambda and types
I use eclipse oxygen 2 Release(4.7.2) I tried some lambda expressions and encountered the following problems: I write …… -
Is java 9 abandoning the SHA1 certificate or something else?
[update] Oracle has just revised its encryption roadmap（ https://www.java.com/en/jre-jdk-cryptoroadmap.html ）, they …… -
Beginner’s questions about heap and garbage in clojure
I have a question about clojure: (defn getAllPrimes [lim] (defn getPrimes [primes numlist] (if (not-empty numli…… -
Java – why mystring equals(“aString”); Different from “astring” equals(myString);?
I have heard many times that Boolean equals (object o) is used to compare strings. It is best to put the constant on t…… -
Java – the difference between loadclass (string name) and loadclass (string name, Boolean resolve)
What is the difference between loadclass (string name) and loadclass (string name, Boolean resolve)? The only differen…… -
Java: read the image and display it as imageicon
I'm writing an application that reads and displays images with imageicons (in jlabel). The application needs to be abl…… -
Openid architecture for Java
I try to understand the concept and benefits of implementing openid in the project Moreover, since I am a java develop…… -
Memory leak using tensorflow for Java
The following test code leaks memory: private static final float[] X = new float[]{1,2,3,4,5,6,7,8,9,1,0}; public voi…… -
Does Sun’s hotspot JIT compiler automatically apply “final” to Java local variables?
I've heard of this, but I can't find a definite online resource to confirm it Background: a colleague likes to make hi…… -
Java – set the list parameter to native query
I want to set the parameter to local query, javax.persistence.EntityManager.createNativeQuery Such a thing @ h_ 419_ 5…… -
JavaFX removable pane system
This is what I like. I've seen it in several different software I don't know its origin or actual call content, but he…… -
java. Lang. IllegalStateException: assetmanager completed
I went to bed yesterday while my application was working, and today I couldn't start when I tried to run it Once I try…… -
Java – why Catalina home_ IS_ The undefined directory is generated by logback in the same project directory?
I wrote the logback configuration file for my application, but when I was doing Maven clean install (MVN clean install…… -
How do I use JNDI to pass parameters to an LDAP custom socket factory?
I am using JNDI to establish an LDAP connection Example: Hashtable env = new Hashtable(); env.put(Context.PROVIDER_URL…… -
Java – best practice for testing indexof return values
What do you usually write when testing the return value of indexof? if str.indexOf("a") < 0 VS if str.indexOf("a") …… -
Java – you cannot use expressions to increment byte values, but use the increment operator
See English answers > why byte + = 1 compile, but byte = byte + 1 not? 8 byte i=0; i++; The following is invalid by…… -
Strange behavior of Java scanner reading files
Therefore, I encountered an interesting problem when using the scanner class to read content from a file Basically, I'…… -
Java – what is the default temporaltype for temporal mapping keys without @ mapkeycolumn or @ mapkeytemporary annotations?
I am creating a JPA 2.0 annotation compliance kit for my internship I know that when you use @ mapkeycolumn to define …… -
ADO. Optimistic concurrency in net Entity Framework
I found that an MSDN article describes how EF handles concurrency when saving changes: I have two questions: >There…… -
Java – someone can explain spring security basepermission Create?
I'm developing a project involving spring security ACL, and I encountered creating permission basepermission CREATE. S…… -
Java – hibernate 5: generator class = “sequence” does not work properly
I have the following mappings: <id name="id" type="java.lang.Long" column="id"> <generator class="seq…… -
Java 9 repl for running applications
Java 9 introduced repl. Exe called jshell in the JDK distribution Is there any way to connect to the jshell of the JDK…… -
Criteria – multiple expressions in the JPA querybuilder where clause do not work
I'm using javax persistence. criteria. Criteriabuilder encountered a problem creating the query I am using eclipse lin…… -
Java – iterator of wildcard type variables with upper bound
Hello, I'm trying to extend HashMap < string, string > to enforce the "all lowercase" rule public class HttpQuer…… -
How to convert vectors in 1 row table in R
In R, I have a 1 - row table How do I convert it to a vector? Specifically, the table is as follows: 0 1 2 3 4 21……