Java
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Java – the best way to initialize ArrayList and HashMap?
Suppose I want to create an ArrayList for numbers The way I learn it is this: private static List<Integer> numbe…… -
java. Lang. numberformatexception: for input string: “23” [copy]
See English answers > what is a numberformatexception and how can I fix it? 9 PS I tried to solve the "Chef and str…… -
You need to display the date in the format yyyy / mm / DD in Java
I'm using nebulla datechoosercombo I use it as datechooserfrom getText();. It produces results such as 7 / 31 / 2011 i…… -
R: Delete the numbers at the beginning and end of the string
I have the following vectors: words <- c("5lang","kasverschil2","b2b") I want to delete "5" in "5lang" and "2" in "…… -
Java – database write lock entity in spring
When I am using its child entity, I need to write lock the parent entity so that it is not allowed to modify (or spars…… -
Java promotes the exact value of N from n to n
I have this simple question Sample input: Enter a 95.123 Enter two 12 Raising the first input to the second input must…… -
Java file to binary conversion
How to convert files to binary? I just need it for my project I need to encrypt the file through its binary file Solut…… -
Java – check in scope precondition
I like the premise of guava, but what I really need is another way - check whether the number is in the range SMT like…… -
How to deny that a value is the same as the value in Java [integer. Min_value]
How are these values the same in Java? -Integer.MIN_VALUE == Integer.MIN_VALUE The values are: -2147483648 : -21474836…… -
Java – the declaration of variable name declares the type of value to be stored? A prank?
Therefore, I have this true / false question in my computer science class (we use Java): (the word "type" in the quest…… -
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…… -
What is a “runtime class” in Java?
I try to understand object The function of the getClass () method Documentation means that it "returns the runtime cla…… -
Java – maximum flow using custom comparator
The following is my specially written code for using a custom comparator with Max in Java 8 stream import java.math.Bi…… -
Java – save values in a loop
I'm trying to read the value of my country array string, which reads CSV files InputStreamReader reader = new InputStr…… -
Java – try to parse the date time in PDT into zoneddatetime representation
How can I parse the date time value in the PDT time zone? 06/24/2017 07:00 AM (PDT) I want to maintain time zones so t…… -
Java – how to parse the “DD mm” date format to get the current year? “
I have to use java to parse the date in "17 - Jun" format The problem is that when I try to parse the "DD mm" format u…… -
Java problems for beginners (string output)
So I'm reading the input of a file that says these lines: NEO You're the Oracle? NEO Yeah. So I just want to ou…… -
Java – stream result using struts 2
I tried to use stream results to return images from a struts 2 application I seem to be having trouble configuring the…… -
Why can’t the java compiler solve this problem?
Why can't the compiler from collections. In the following example Emptyset() infers the correct type of result? import…… -
Java compiler replaces StringBuilder with concatenation
Here are some simple java code: String s = new StringBuilder().append("a").append("b").append("c").toString(); I compi…… -
Java: how to get the connection port from InetAddress?
I'm trying to use Apache Mina to build a socket server based on Java NiO I really need to know the port of the remote ……