Recent Posts
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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…… -
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.…… -
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 – 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 – lock static members of a class
According to my understanding, the following code should cause deadlock However, the program runs normally and prints …… -
How to wait for the Java applet to finish loading on safari?
This does not work in Safari: <html> <body> <applet id="MyApplet" code="MyAppletClass" archive="MyApple…… -
Java – is it bad practice to save data in static variables?
(this exact question may have been asked before. I can't find it through search. If you find that it has duplicate tag…… -
Create directory If so, delete the directory and its contents and create a new directory in Java
I'm trying to create a directory in Java If it exists, I want to delete the directory and its contents and create a ne…… -
How do events work in Java swing?
How does event creation and handling work in Java swing? Solution Java event mechanism is actually an implementation o…… -
Java – why is the output different in the case of \ u0026 \ u0026, &, |?
This is a code snippet Can you explain why the output changes? 1) public static ShortCkt { public static void main…… -
Java – does Python really create all binding methods for each new instance?
I'm reading the classes in python (3.4). According to my understanding, it seems that each new object has its own bind…… -
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…… -
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…… -
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 – 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 – 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…… -
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…… -
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 …… -
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…… -
Multithreading – does Delphi class variable have global or thread local storage?
My guess is that the class variable ("class var") is a real global variable in storage (that is, an instance of the wh…… -
Java – pass the map to the method that needs the map
I have a method with the following signature public static ActionDeFinition reverse(String action,Map<String,Object…… -
java. Lang. outofmemoryerror: cannot create a new native thread
I see such comments At Sun Java Forums In my application, we initially planned to use threads, but then we decided we …… -
Java library for converting latitude / longitude to MGRS coordinates and vice versa?
I want to know what kind of libraries exist (licensed or unlicensed) and I can find a way to convert between latitude …… -
JNA unsatisfiedlinkerror – when I put Java library. Takes effect when path is set to a dummy value
Using JNA 4.0.0 on Linux 0, I tried to load a native library (libmean. So), which is located in the Lib subdirectory (…… -
Java – how to unpack an original object from a dynamic proxy
What is the best way to unpack a dynamic proxy to retrieve the following original objects? thank you. Solution Each ag…… -
Send trap V2 in Java
How to send SNMPv2 traps from Java applications I tried to do an example on snmp4j, but it didn't work Solution I use …… -
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…… -
Java – use limit connection string
Using only the standard Java library, what is a simple mechanism for concatenating strings to restrictions and appendi…… -
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…… -
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…… -
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 – 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……