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…… -
How do Erlang virtual machines run as daemons?
I want to run Erlang VM as a daemon on a UNIX server in non interactive mode Solution The easiest way is to give the E…… -
Eclipse 4.3.0 with Java 8 patch 2 unrecognized source level 1.8
I am using eclipse 4.3 with patches for Java 8 2, as well as M2e and subclipse, completely update all contents to the …… -
Compare twice in Java more or less
Date date1= new java.util.Date(); Date date1= new java.util.Date(); java.sql.Date sqldob = new java.…… -
Java – using quartz and spring
In my application, I need to be able to create scheduled jobs (dynamically) based on the incoming request type Can I a…… -
Java – jspinner: increase the length of the edit box
I have a jspinner that displays decimal values from 0.0 to 999.0 It seems to work properly, except that it displays a …… -
Overhead and code speed (java.io.file array and java.lang.string array)
Just trying to sort out a small category I have here At present, I am developing an application involving collecting t…… -
Java – CompareTo may return 0 instead of TreeSet / treemap
I need an ordered set of objects and am currently using TreeSet My problem is that CompareTo of objects usually return…… -
java. util. zip. Zipexception: duplicate entry with firebase
I'm building an application using firebase, but I got a duplicate class error I checked all dependencies, but I couldn…… -
java – DataOutputStream#writeBytes(String)vs BufferedWriter #write(String)
I want to create an HTML file for my report You can use bufferedwriter #write (string) to create the content in the re…… -
Java – randomgenerator – lost 50% of aircraft simulation
I'm working on a problem that I'm a little confused The problem is, suppose you were a general of the British air forc…… -
In Java, is there a more concise method for if statements with a large number of |
I know this problem is basic, but I'm looking for a less clumsy method. The following if statement: if ((sOne.Contains…… -
Is Java: executorservice less efficient than manual thread execution?
I have a multithreaded application When using thread When start () starts threads manually, each concurrent thread use…… -
Java – how to use apostrophe (‘) in XPath when using webdriver to find elements?
I need to use an apostrophe (') in my XPath expression, and I need to use it when using webdriver to find elements I n…… -
Java – can I close and reopen the socket?
I learned an example of socket use In this example, the client sends a request to the server to open the socket, and t…… -
Java – an instance that calls a static method
nice day! I'm a little confused I want to use calendar, so I search it on the Internet and encounter the following cod…… -
Why do single threaded Java programs have so many threads?
I have a java program with 13 threads, but only one is 99% CPU utilization and has been running for about 24 hours Oth…… -
Java – resource exception not found
I got a resource not found exception in the line where I referenced one of my class methods that mapped the EditText o…… -
Java stream operation sequence executed by the terminal
See English answers > stream intermediate operations ordering 2 For example, let's look at these examples using the…… -
What are the effects of redundant import statements in Java?
What is a redundant Java import statement? Do they affect the compiled runtime (performance / size)? Or something like…… -
Java BinarySearch
Can I get some help? I've tried many ways to make this work. I get array sorting and printing, but then my binary sear…… -
Java – use limit connection string
Using only the standard Java library, what is a simple mechanism for concatenating strings to restrictions and appendi…… -
Java – how to prevent the function passed to optional orelse from being executed when optional is not empty?
If I call a function from orelse, the function will be executed even if optional is not empty Is there any way to rest…… -
Java – use jodatime to calculate the month between the two dates of the holding year
I use this code to calculate the number of months between the input pastdate and CurrentDate It uses jodatime LocalDat…… -
Using Java and AES to encrypt large files
I tested my code with files below this value (10MB, 100MB, 500MB), and the encryption worked normally However, I encou…… -
Java – can I restart my application using main()?
I'm working on a way to restart my java application by clicking a button on the GUI I searched the Internet and encoun……