Java
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Java – fast string search, such as startswith() is not equal to ()
I have a sequence list (a dictionary – 100k words) and many words are often searched in this list Therefore, performan…… -
Why is the string method substring () not in camelCase in Java?
According to Java standards, we should follow camelCase But why is the string method substring () not in camelCase? Is…… -
Print a list in Java?
I want to print a list in Java @H_ 301_ 8@ @H_ 301_ 8@ r1 r2 r3 r4 This is the code: @ h_ 301_ 8@ @H_ 301_ 8@ public s…… -
Java – what is the best remote technology for mobile applications?
I have a Java backend that needs to expose services to clients running in the following environments: > J2ME > W…… -
Being confused by Java generics requires a cast
I'm confused about the following code: import java.util.ArrayList; import java.util.LinkedList; import java.util.List;…… -
Java – ArrayList and indexof problems of my objects
I have an ArrayList problem with Java I created an object that contains two attributes X and Y. now I loaded some obje…… -
Java: how to create a loop to create an array?
I need a lot of arrays, now I create them manually: int[] row1 = new int[3]; int[] row2 = new int[3]; int[] row3 = new…… -
Java – wicket – which ORM?
I am looking for an ORM that is easy to use and integrated for wicket applications I'm thinking about hibernate Is thi…… -
Java – find element or check if it exists in array / list?
I'm a novice. I really don't understand how this works I made a list of room information: List<Room> rooms = new…… -
Java – the question I tripped over in the interview
I was asked several Java interview questions. I don't know how to solve them. I can use some answers >Write a metho…… -
Can Java constructors construct subclass objects?
Is there any way to modify the class constructed in the constructor? public class A { A() { //if (condition) ret…… -
Java – how do I check for memory leaks?
Can I check for memory leaks without entering the code I have my application and I want to check for memory leaks In m…… -
Java – how to read a user’s char on the command line
How to read the user's char from the command line I am familiar with readint() There is no such thing as character Thi…… -
Java – structured stream exception when using additional output mode with watermark
Although I am using watermark (), when I run my spark work, I receive the following error message: From what I saw in …… -
Java – error: the main method cannot be found in the class calculate, please define the main method as: public static void main (string [] args)
See the English answer > "main method not found" error when starting program? 7 Error: Main method not found in cla…… -
Java 8 stream operation
Suppose I have a character stream named s Is it possible to convert a single string into a unary operation of two stri…… -
Is it a myth to improve the programming efficiency of Java or c#?
One of the advantages of Java or C # in improving development efficiency is that you should reduce time through comple…… -
Java – format for a period of time
In Java, I have a long integer that represents a period of time (in milliseconds) The time period can be any time peri…… -
Unit test – how to simulate the improved service observable that calls onerror?
I'm testing this code service.getProducts() .subscribeOn(Schedulers.io()) .observeOn(AndroidSc…… -
Java – what is the exact difference between these two sets of statements?
Set<Type> union = new HashSet<Type>(s1); Set<Type> union = new HashSet<Type>(s1); and Set<T…… -
Java – how to disable playback 2.6 csrffilter
I was recently migrated to 2.6. When I called my API from the postman about filters, I got 403 replies At first, when …… -
Java – how’s it going? Listening location setting is turned on (android app)
So I spent weeks working on my Android application and studying the best way to achieve what I need to do, but I still…… -
Java – Tomcat and VM
It's really hard for me to understand where Tomcat actually runs It is executed in the JVM, which executes servlets Or…… -
Java – I-phone VM for Android
I'm considering setting up a project to create an I-phone virtual machine for Android 2.0 (read Motorola Droid). Befor…… -
How to determine whether a class is equal to or extends another class (Java)
So I'm writing a minecraft mod, in which I successfully added a pistol, which can handle various support classes, ray …… -
Java – add schema names to entities in spring data?
Error using Oracle dB and spring data The error is: ORA-00942: table or view does not exist The reason for this error …… -
I have the following java code problems
public class b { public class b { public static void main(String[] args) { byte b = 1; long l = 12…… -
Java – how do I get the file list from the SFTP server?
I have a problem and hope to get a solution I also wrote some code, but I need to make some changes Question: I have a…… -
Java – change eclipse getters setters syntax
Is it possible for eclipse to generate getvar1 () instead of getvar1 ()? (with capital g) Solution I doubt it very muc…… -
Java – find specific file types from folders and their subfolders
I'm writing a method to get specific file types from folders and subfolders, such as PDF or txt, but I can't solve thi…… -
Multithreading – clojure – effectively increases the number in the list at the same time
Short version: what is the right way to store hundreds of numeric lists in clojure, increasing each number millions of…… -
Java – what is the purpose / purpose of abstract classes? Look for real-world examples
Can someone show me an example of an abstract class in Java? Something with real - World Applications (rather than tex……