包含标签：Java 的文章
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java. sql. Sqlexception: ora-00932: inconsistent data type: expected number to get binary
I have a method in Dao class that returns list < object [] > Back, I'm using named queries public List<Object…… -
When we assign integer to int in Java, why doesn’t the compiler make an error
When we assign integer (object) to int (primitive), why does the compiler not make an error? int i; Integer ii = new I…… -
How to set httppost header for client requests in Java and Android
I can't get Apache httpclient to send httppost header correctly I have no problem sending name value pairs and things …… -
Java – how to display ProgressDialog when using salvo for network operations
I work on an Android application and I am very interested in using the volley library to perform network HTTP calls Bu…… -
Java – abstract classes cannot be implemented from other packages
For some reason, I can't seem to implement an abstract class outside the package that defines it Abstract classes in P…… -
Java – find the smallest integer based on the input
I have a task to find the minimum, maximum and average number of user input Basically, they enter positive integers, s…… -
How to ensure that collections in Java contain only one type?
I want to make sure that the collection can only hold one type It can be said that there is such a method public Colle…… -
The most lightweight Java collection
If I want to create a Java collection and just want to fill it with elements and traverse it (I don't know the necessa…… -
Java – design GUI for J2ME applications
How to create J2ME application for mobile phone using GUI similar to menu displayed in java game? I've tried using Net…… -
Javac does not have openjdk-6-jdk installed
I've been trying out some different Java compilers over the weekend and decided to stick to javac this morning Then I …… -
Java – wait for all threads to complete before closing executors
This is a snippet of my code ExecutorService executor = Executors.newFixedThreadPool(ThreadPoolSize); while(conditionT…… -
Java – Maven compilation does not create class files
I have a 3-module Maven project with the parent POM When I run Maven clean compile test from the parent process It fai…… -
Java – how to add a second table to the database in SQLite?
I have a database exam guide. I have created a table_ Subject and now private static final String DATABASE_CREATE = "c…… -
For loops run forever in Java [copy]
See English answer > what is X after "x = x + +"? 17 @H_ 419_ 9@ @H_ 419_ 9@ public static void main(String[] args…… -
Implicit super interface in Java?
So we all know that all classes implicitly extend object How about the interface? Is there an implicit super interface…… -
Java – why can I unexpectedly create multiple instances of my singleton class?
According to my knowledge, singleton design pattern means that we can only create a single object of one class The fol…… -
Java – multipart resolver does not process multipart requests
I recently made some changes to my spring application by adding CSRF support To do this, I must also change the way I …… -
Java – hibernate manytoone n 1 select id
N 1 select query I encountered a strange problem My mapping looks like this: @Entity @IdClass(MyTablePK.class) @Table(…… -
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 – ignore the record of repeated exception messages from third-party libraries
I need to deal with the repetition of specific exceptions in the log I use slf4j and logback to log in to my applicati…… -
Java – create the assertclass () method in JUnit
I am creating a test platform for the protocol project based on Apache Mina In Mina, when you receive a packet, the me…… -
Java – how to get the contact name from the Android (calllog. Calls. Content_uri) table?
I am new to Android and am developing an application. I need all outgoing call logs, numbers, call duration and contac…… -
Java – clicking on an item results in an IllegalStateException
How did this happen? I used recyclerview in the clip, and the clip itself implements my click listener Sometimes, clic…… -
Java – numbers and occurrences in the array
My job is to use the package implementation of array. You can add and delete numbers as needed So far, I have successf…… -
Java – spring data JPA – custom sorting in jparepository
I used spring data JPA and spring data rest and created a jparepository for my thing entity @Repository public interfa…… -
Load a record with
What is the preferred way to load a record using doctrine? I'm using it $em = EntityManager::create($connectionOptions…… -
Java – can I open repl in the context of a spring web application?
I am developing web applications based on spring MVC and hibernate on Tomcat 8 (for deployment and local development) …… -
Java – Google server authentication code failed login
So I managed to use the new Google login to work GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignI…… -
JavaFX is relative
Everything is great to work on this desktop application There were some problems with her and there, but each one was …… -
Java – add JPA to the right
NewRequest. java @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Basic(optional = false) @Column(nullable = f…… -
Thread job in Java
I want to generate 200 threads in Java at the same time What I'm doing now is entering the loop and creating 200 threa…… -
Why is the order of return types important when defining methods in Java?
public void static final finalMethod() public void static final finalMethod() { //This throws error saying "Syntax e……