包含标签：Java 的文章
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. Net – multithreading and Boolean
I have a class that contains Boolean fields like this: public class MyClass { private bool boolVal; public boo…… -
Java: retrieve key after executebatch() in H2
I tried to retrieve the generated key from the executebatch() transaction, but I only got the last key to add This is …… -
Java – duplicate code in enumeration inheriting public interface
I have several enumerations that conform to common interfaces: interface TableColumns { String getColumnName…… -
Java generics pass parameters
I hope someone can help me get rid of this trouble I did this: public static <T> void myMethod(Map<Class<T…… -
Java – the ideal place to store binary data that can be rendered by calling a URL
I am looking for an ideal (performance efficient and maintainable) place to store binary data In my case, these are im…… -
Java – add firebase in app messaging issues
I've been trying to add firebase in app messages to our Android project It builds successfully, but when I run the app…… -
Unable to authenticate SSL site in Java: “pathlenconstraint violated – this certificate must be the last certificate in the certificate path”
I tried to read from a secure (i.e. SSL) web page in Java code Please note that I have successfully established a non …… -
Java – illegal UTF-8 sequence connected to PostgreSQL database
I have the following code to connect to the database String host = "jdbc:postgresql://localhost:5432/name"; String…… -
How to use concat to get different object lists in Java 8
I have two Java classes class A { String name; List<B> numbers; } class B { Integer number; } I want to get …… -
Java – line breakpoints do not work in some classes
I am using IntelliJ idea to debug applications running on Tomcat But I have a problem. In some classes, line breakpoin…… -
Java finds the network interface of the default gateway
In Java, I want to find the Java. Net interface corresponding to the interface used net. The network interface arrives…… -
Java – class with multiple bounded types and unchecked casts asSubclass
I have a class of type < T extends enum < T >& Ampere; Operational replacement I have a member variable c…… -
In Java Purpose of class file
I tried to understand How class files work in Java and what their purpose is I found some information on the Internet,…… -
java – Spring – server. Invalid connection timeout
In my application In the properties file, I have server.port=8086 server.connection-timeout=15000 I know the file is l…… -
What are the best practices for including third-party jar files in Java programs?
I have a program that needs several third-party libraries. At present, its packaging method is as follows: zerobot.jar…… -
Java – system. In Tomcat Scope of setproperty
This question is the "cousin" of this one involved Android But here we are in the Tomcat environment If in my webapp, …… -
Java – OWASP HTML sanitizer clear comments
I have an application where customers can store the following HTML lines to load different styles for the actual brows…… -
Java – GCM – failed to publish JSON request to GCM after 6 attempts
I have the same problem as this I will try to provide more information I'm using the play framework, written in Java I…… -
Java – Eclipse: editing and running code in real time
When editing java code in eclipse, I can modify the code in various ways and make these changes take effect without re…… -
Java – improving the movement of aliens in space
I wrote a mini Android game scene inspired by space invaders and moon patrol Aliens can be photographed horizontally (…… -
Java – servlet filter URL mapping
How do I map a filter to the root of a URL? I'm using Tomcat 7.0 2 and deploy the application as root war. The welcome…… -
Java – create a user in the keycloak through the keycloak management client and return the illegalargumentexception
I want to create a user through the keycloak management client, but I get: This is my keycloak bean: @Bean Keycloak ke…… -
Java – hibernate and Flyweight
Is there a way to use flyweight objects with sleep persistence mapping? My data model contains many of the same object…… -
Jackson object mapper converts Java maps into JSON maintenance keys
I use Jackson map. The objectmapper API converts a map into a JSON string I use the writevalueasstring method to achie…… -
Java – hibernate onetomany standard returns duplicates
I have an association mapped by: @Entity public class Parent { ... @Id @Column(name = "parent_id") private…… -
Write temporary files in Java
I want to write temporary files in append mode I see that the file has been created, but the data in the StringBuffer …… -
Java – copy of Lombok @ getter and collections
Using @ getter on the list field works normally, but concurrent modificationexceptions are encountered when trying to …… -
java – org. apache. commons. net. ftp. Problem with ftpclient listfiles()
org. apache. commons. net. ftp. The listfiles() method of ftpclient is applicable to 127.0 0.1, but returns null under…… -
Java – convert the list to a list of 10 items
I have a list of POJOs Convert this POJOs list to a list, where each sublist is 10 or smaller in size So, for example,…… -
Java – convert c-shared library callbacks to other languages
I am developing a library that will be written in go and compiled into a C shared library, so it can be written in Pyt…… -
Java – RPM files generated using the Maven RPM plug-in
I tried to create my Maven project on my windows machine RPM file I follow the steps given in the link below to implem…… -
Java – when AspectJ is loaded, weaving cannot work on spring beans
I'm developing a project that uses the Java (not XML) style of spring configuration to connect dependencies It also ha……