Recent Posts
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Java – how to prefetch Oracle sequence id-s in a distributed environment
I have a distributed Java application running on five application servers, all using the same Oracle 9i database runni…… -
Java – how do I use class files?
I'm new to Java. I want to know how to import the class file into NetBeans and use it I know class files are machine -…… -
Java – how do you call other methods in an enumeration?
enum Enum1 enum Enum1 { BIG(8),HUGE(10) { public String getName() { return "Huge";…… -
Java – elasticsearch uses the jest API to scan and scroll
I am currently working with jest: Can I scan and scroll using this API? http://www.elasticsearch.org/guide/reference/a…… -
Java – how to insert detail bands between existing bands in ireport?
A simple question How do I insert detail bands between existing bands in ireport? Detail 1 Detail 2 Detail 3 ... I wan…… -
Java – spring: a bean that receives a list of classes
I want to define a bean in my spring XML context, which has attributes of type list type: List < class > class …… -
Print * as triangle in Java?
My task in java course is to make three triangles One left, one right and one center I have to create a menu of why ty…… -
Java 8, lambda: sort in the grouping list and combine all into the list
Based on the following answers: https://stackoverflow.com/a/30202075/8760211 How to use study_ ID sorts each group, an…… -
Java – HashMap return method
I have a method in my class, which initializes a HashMap and puts some keys and values in it, and then the method retu…… -
Java starts another Java application
I'm building a wrapper jar for the jar I built It will handle updating the main application and ensure that the user i…… -
Java – create a new instance class reference
I have an enumeration like this: public static enum TestEnum { // main ENUM_A (1,"test1",TestADto.class),ENUM…… -
Java 8 nested loop flow
Try to understand java 8 stream syntax through a simple example Look at other similar problems on this topic, but I ca…… -
Java sliding jpanels
I have a menu showing various buttons. I can make the buttons call their respective jpanels when clicked The thing is …… -
Java – optimal time complexity of string reverse operation: O (n) or O (n / 2)?
The following is a snippet of string inversion private static String reverseString(String originalString){ char arr[]=…… -
Java adds a string to a string array
See English answer > java dynamic array sizes? 18 static String[] ipList = {"127.0.0.1","173.57.51.111","69.696.69.…… -
Java – how to add a new element to varargs?
I have a way public boolean findANDsetText (String Description,String ... extra ) {@H_404_3@ 在里面我想调用另一个方…… -
Java – pass additional (second) parameters to guava predicate
I have this predicate to filter my task objects by date: Predicate<Task> startDateFiltering = new Predicate<T…… -
Exception in thread “main” Java lang.NoClassDefFoundError：org/sqlite/NativeDB
I'm trying to run a simple SQLite example on the Mac I'm pretty sure the code works well on windows But not on the Mac…… -
Java – Preparedstatement does not read all parameters of PostGIS geography
I have the following JDBC code Please note that I am trying to use PostGIS geographic location: PreparedStatement stmt…… -
Jar – getting started with JavaCC
I'm new to JavaCC and can't figure out how to make it work I am using Mac OS X, and I have javacc-6.0 installed Zip an…… -
Keep a pair of primitives in Java HashMap
I have a list of documents I want to scan and keep the number of files of the same size The problem is that the file s…… -
Caught “Java. Util. Concurrentmodificationexception”
This is my code: // eventList is a LinkedList public void run() { Iterator<Event> it = eventList.iterator(…… -
Java – eclipse link: there is no persistence provider named entitymanager
I want to create a bundle that can use Java persistence To do this, I created a plug - in project in eclipse In my pro…… -
Which to choose: 2D or 3D for java games
What should a small team choose for their first game when they are not punctual but ambitious? I am an experienced pro…… -
Why do we prefer primitives and boxed primitives in Java
I'm reading the second edition of valid Java and page 23 // Hideously slow program! Can you spot the object creation p…… -
Java – reset auto increment in H2
I'm testing a controller that returns a JSON response but doesn't @Before public void setUp() { Fixtures.deleteAll…… -
Can a java program know its current directory?
Can a Java application know its own current directory I am referring to the results of PWD For example, when executing…… -
Iterates over generic arrays of any type in Java
If there are Java collection instances that can carry primitive types, generic arrays, and / or iteratable collections…… -
If there is no system Out, what about printing on the console?
I recently encountered a problem in an interview The problem statement is – > assuming that you cannot access the s…… -
Is java suitable for “Web 2.0” applications?
A few days ago, I chatted with someone who suggested that rails and PHP are the most suitable platforms for web applic…… -
Java – UML represents an anonymous class in the class diagram?
How to represent Java anonymous classes in UML class diagrams? Solution Illustration: resources: >UML class diagram…… -
Java IPv6 address string to byte
How to convert a string containing IPv6 machine packet targets into a 16 byte array? I know GetBytes and encoding, but……