Java
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Java – why does HashMap insert new nodes on the index (n-1) and hash?
Why does HashMap insert a new node on the index Where hash = key hashCode()^ key. Hashcode() > > > 16 and N =…… -
Java – keytool creates a trusted self signed certificate
I'm trying to create a self signed certificate using (Java) keytool, but when I try to use it, I get the following exc…… -
Java – how does soap support asynchronous calls but rest does not?
Through soap vs rest on the Internet, I found that most people said that soap supports asynchronous calls, but rest di…… -
java. Lang. outofmemoryerror: Java heap space when initializing arrays
I tried to initialize a Boolean array whose size is a 10 bit integer It continues to throw OutOfMemoryException I have…… -
Layout manager preferredSize Java
I'm still trying to learn how layout manager works I made a frame with two jpanels I set the preferredSize of each pan…… -
Java – returning an int from a native function (C, JNI) causes the application to crash
Trying to figure out why returning an int from a C function call causes the entire application to crash without any er…… -
JSF 2.0: verify the equality of two inputsecret fields (confirm password) without writing code?
I am using JSF 2.0 and GlassFish to develop pure Java EE 6 applications I want to verify whether the values of the two…… -
Java – can I access interfaces only in the same package and sub package?
Can I access interfaces only in the same package and sub package? I have defined an interface using the default modifi…… -
Arm64: ldxr / stxr and ldaxr / stlxr
On IOS, there are two similar functions, osatomicadd32 and osatomicadd32barrier I want to know when you need the barri…… -
Java generics and addall methods
Addall (..) in Java collection What is the correct parameter type for the method? If I do something like this: List<…… -
Java – GVM is always offline
I'm trying to install gradle through the GVM command '$GVM I gradle', but I received a message in offline mode ➜ ~ ➜ …… -
Java – sets the column width of JTable by percentage
I need to assign a fixed width to several columns of JTable, and then assign an equal width to all other columns Suppo…… -
Java – finds and counts specific words in a text file
Can someone help me with the code? For example, test txt： hi hola hey hi bye hoola hi If I want to know in test Txt h…… -
Java – what is the difference between T and T in the return type of a method?
I have a way, like this, public <T> T doSomething(Class<T> T) { return T.newInstance(); } I can do it like…… -
If I don’t know any of the frameworks involved, what methods should I use to understand large J2EE applications?
I started working in my company five or six years ago as a junior java developer. I started some J2EE programming usin…… -
Java – how to iterate over a Multimap in insertion order?
Using guava from Google, http://code.google.com/p/guava-libraries/wiki/NewCollectionTypesExplained New series How do I…… -
Java – FreeMarker – remove commas from milliseconds
Using FreeMarker, I want to display the date in milliseconds: ${mydate?long} But I get a comma separated millisecond a…… -
The Java – Weblogic management console is too slow
I have installed Weblogic 10.3 3. A simple domain is configured using the default configuration After starting Weblogi…… -
Collections. Binarysearch (list, K key) clarification Java
In view of the following declaration, it is taken from this Oracle Java Tutorial and related to the binarysearch() met…… -
Java – performance difference between post increment and pre increment operators?
In Java, does the use of post increment and pre increment operators have any performance impact? Example: i++ ++i Sol…… -
Java – using collections Frequency() prints some values
I have an array as follows: int[] array = {11,14,17,11,48,33,29,22,18}; What I want to do is find duplicate values and…… -
Java – why include class names when referencing static variables?
When doing some Java jobs, I answered a question by writing an instance method. In the method, I used some static fina…… -
Java – what does the syntax “final string… Args” mean / do?
This should be a fairly simple question I looked around and couldn't find any topic about this grammar, and "..." made…… -
Java – how to create a class that I can’t change and implement an interface?
I have a class from another closed source library, but I want to be able to use its interface The reason is that I don…… -
Java – ‘for’ loop can be replaced by ‘foreach’
My code is: ArrayList<People> people = new ArrayList<>(); // people.add(...); // people.add(...); …… -
Where can I find the Java source code for the Vigenere password?
In my application, I want to implement some encryption So I need the code for the Vigenere password Who knows where I …… -
Java – how does eclipse actually run JUnit tests?
I encountered a difference when running JUnit tests in eclipse and ant This is the scenario: Everything runs as expect…… -
Get image path JavaFX
I want to get the pathname of the current image loaded in my image object I have the following code: Image lol = new I…… -
Java – how do I limit the size of a table?
I have a SQL Server 2005 database I'm recording the data in the table I want to prevent the table data from getting to…… -
Java – how to ignore unit tests when conditions are met?
I wonder if there are comments or methods that can only execute tests if pre conditionoin is satisfied? Solution You c…… -
When the mouse clicks, Java draws a circle
I'm writing a program that draws a circle when I click the mouse So far I have written the following code import java.…… -
Java – calling a new thread inside is a constructor
Is it correct to create a thread and call its start () method in the constructor of the class? public class Server imp……