Java
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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 – aliastobeanresulttransformer and hibernate sqlQuery
I have a fairly complex query (HQL or criteria queries have too many nesting levels), so I write it as sqlQuery I real…… -
Understanding generic types in Java
I have a general class that says: @H_ 404_ 8@ @H_ 404_ 8@ MyClass<T>@H_419_12@ 在这个类的方法中,我想测试T的类…… -
Java – how to get parameters from the URL in Liferay portlet?
I used something like feed in Liferay 6 JSP of out of the box portlet such as jspf: String articleId =null; HttpServle…… -
Java – ArrayList removeall() does not delete objects
I have simple ArrayLists for member classes: ArrayList<Member> mGroupMembers = new ArrayList<>(); ArrayLis…… -
Concurrency – can I receive results from one of multiple goroutines in go?
I just learned about Google's programming language go I'm interested in the concurrency support it provides and set ou…… -
Java – splits the list into sub lists according to the conditions of the stream API
I have a specific question There are some similar problems, but these problems are either Python or Java, or even if t…… -
Can you comment on my java game?
I have marked this question as a community wiki, so no reply points will be thrown I made this game, forest defender, …… -
Java – cannot inherit from final class
I just created my first Android library In another application, I want to extend a class from it But it shows an error…… -
Is there any way to declare a method “friendly” in Java?
I know you can set the property to public, friendly or private to specify its visibility Is there any way to announce …… -
Java – get random numbers from ArrayList?
ArrayList<Integer> lista = new ArrayList<Integer>(); ArrayList<Integer> lista = new ArrayList<I…… -
After uninstalling Java and reinstalling it to a new location, eclipse will not start
I reinstalled the JDK tonight because there is embedded space in the program file... Now eclipse will explode immediat…… -
Java – how do I send messages from my android app to specific contacts via WhatsApp?
I'm developing an android app. I need to send messages to specific contacts of WhatsApp Uri mUri = Uri.parse("smsto:+9…… -
Merge sort Java
I'm trying to create a merge sort method, but it continues to give the wrong sort Where do I make changes to actually …… -
Java – can I create a bitmask for ~ 100 constants?
Does this mean that the 100th constant must be 1 < < 100? Solution You cannot do this directly because the maxim…… -
Java – returns the number of rows in a 2D array?
I have this 2D array: private boolean[][] landscape; This landscape array defines a pond with [rows] and [cols] The pu…… -
Char range in Java
The following line of Java code generated an error char c = -128; Solution Char is a data type that is not signed in J…… -
Short condition, Java
I want to test whether the current char is', ',' – ',' Or‘‘ if((current != ' ') || (current != '.') || ...) Any ideas?…… -
Java – cannot run Hello world on drools – kiecontainer does not select DLR files from the classpath
The following documents: 6.1 The basics I created a simple class applicant, which should be checked by using the DRL f……