包含标签：Java 的文章
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How does Haskell remove list usage from this code?
I'm trying to learn Haskell and binary io I try to read many word32 values and some word8 values (metadata) from a giv…… -
Why in Java util. Static Java. Java is declared in collections util. Collections. Fill () method instead of Java util. Instance method in abstractlist?
In Java util. In collections, there is a method: public static <T> void fill(List<? super T> list,T obj) P…… -
Using objects as keys in Java HashMap
package test; package test; import java.util.HashMap; public class test { public static void main(String args[])…… -
RX Java – retry the same project after the error
I'm trying to build a robust processing pipeline using RX - Java, but I have a problem Here is an example: public stat…… -
Use the or “|” operator on statements in Java
Suppose I have an array a [], if I want to change the value of a [i] and change it to zero, I can do it by using the t…… -
Evaluation order of sub expressions in Java expressions
I have the following code snippets: int x=2,y=3; if ( (y == x++) | (x < ++y) ) // rest of code I know that in C you…… -
Java swing gridbaglayout – add a button without spaces
How to delete the spacing caused by gridbaglayout and make them stick together? import java.awt.BorderLayout; import j…… -
Java – why can’t the final static variable be assigned in the instance block?
class Test { class Test { static final String name; { name = "User"; /* shows error. As …… -
Java sorts a collection of date and time values
I'm using notes Jar Lotus Notes API to extract the date and time of E - mail When I add them to the collection, if I a…… -
Java – webelement or webdriver calls findelement method?
What's the difference if we use webelement or webdriver to call the findelement method? Does each of them have an adva…… -
If the specific conditions are incorrect, I can’t return anything
I'm writing a matrix class. I've written a getnumber method that returns the number in a specific slot in the matrix W…… -
Java – how to use the if else statement returned by the function?
I always try to avoid nested statements They guided me to put the code in curly braces When the amount of code in each…… -
Error passing volatile STD:: queue discard qualifier [- fpermissive] C 98
I have one volatile std::queue<int> requestQueue; When I try to call any of its methods (pop, push, empty, front…… -
Generic – rxkotlin: attempt to add custom error capture
I'm trying to write my own extension function for rxkotlin, which will make observable handle a specific error type (t…… -
Java – is there any other throw role instead of propagating checked exceptions?
After more and more research on the throws statement in exception handling, I am confused I found – class @R_474_2419@…… -
Java – Jackson mapping: deserializing JSON with different attribute names
I have a server that returns JSON strings: {"pId": "ChIJ2Vn0h5wOlR4RsOSteUYYM6g"} Now, I can use Jackson to deserializ…… -
Java class by default, it implicitly extends Java lang.Object
See English answers > java doesn't support multiple inheritance but implicitly every class in Java extends object a…… -
java. Lang.illegalargumentexception: unable to initialize due to invalid key
I received an encryption exception I'm running >OS X 10.11 > java 1.8 > groovy version: 2.4 4 > Gradle 2.3…… -
Java initialization variable increment
Is it risky to initialize a global variable in increments of another global variable? Example: int a=0; int b=a++; i…… -
Implement within the interface – Java
We know that we cannot implement functions in interfaces in Java I just tried public interface InvoiceService { publi…… -
Java – retrieves values from nested JSON arrays in mongodb
My Mongo collection has entries in the following format { "myobj" : { "objList" : [ { "locatio…… -
Java – the difference between using the exception class or FileNotFoundException class to catch exceptions
Just like I have these two scenarios, we must deal with FileNotFoundException Case 1: try { FileInputStream fi…… -
Java gives the wrong answer in computing
I want to do some calculations in Java, I know it's not so bad to do something in more steps, but why use additional t…… -
Multithreading – when using a method in a thread, “the type does not meet the required lifecycle”
I tried to use a method in a thread in rust, but I received the following error message Here is the sample code: use s…… -
Java – setlocation in jlabel
My task is to get the position of the mouse when I click, except for one thing: the position of the output I should ge…… -
Java – connect to AEM 6.0 JCR: precondition failed
I encountered some problems connecting to the JCR repository in AEM 6.0 When I reach the point about creating a sessio…… -
Java – static and non static overloads to each other
Are these two functions overloaded class yogi{ public static void fun(){ System.out.println("Fun"); } …… -
Java – generics and inheritance?
See English answers > java: can't to generic list mylist 4 public static void main(String... args) { List<C…… -
Creating named pipes in Java
I'm trying to create named pipes in Java I'm using Linux However, I encountered a problem writing to the pipeline File…… -
Reducing objects to maps using java 8 streams
If I had a similar course public class Property { private String id; private String key; private String va…… -
Java – first item name of JTable jcombobox error
I added a swing to a JTable JCombo@R_695_2419 @, but the tag of my first project was always javax swing. JCombo@R_695_…… -
Java – rise from preferencearag and preferencefragments using optionsitemselected
I'm having trouble using optionsitemselected when using Android studio's default set activity (extended appcompatprefe……