包含标签：Java 的文章
-
Java – find unpaired numbers in an array
I have an array that repeats all elements except one: int[] a={2,6,2,4,1,4}; How do I find unpaired element integers? …… -
IO stream technology
Create and delete files: createnewfile(), delete() Create folders: mkdir() and mkdirs() List next level: lists the sub…… -
How to resolve file names in Java?
I have a java file path /opt/test/myfolder/myinsidefolder/myfile. jar I want to replace the file path with the root pa…… -
Java – how to add padding using container?
I tried to do some padding at the top, but how do I use the container? JFrame frame = super.screen.getFullScreenWindow…… -
How to use Qt5 to realize multithreading (I)
#include "thread_one.h" thread_one::thread_one(QObject *parent) : QThread(parent) { } void thread_one::run() { …… -
The value of Java jsonobject array is key
I'm new to Java, so it's a little confusing I want to get a string in JSON format What I want is { "user": [ "name","l…… -
Java hashcode() string conflict
I know little about hash codes I found that this code can print out collisions Can you tell me what collision is and h…… -
Java – allocate memory using thread
I wonder what happens if a local thread is declared in a method? Usually, after the function returns, all local variab…… -
How to solve this Java lang.ClassCastException：org. apache. tomcat. dbcp. dbcp. Basicdatasource cannot be cast to org apache. tomcat. jdbc. pool. DataSource？
I tried to use pool for database connection in Tomcat. This is my context: <Resource name="jdbc/slingemp" auth="Con…… -
Why does BigInteger’s stackoverflowerror in Java end up as an integer in the 19635th Fibonacci sequence
I use the following code to calculate the Fibonacci sequence to any large number The code worked as expected until I a…… -
Java – find the largest palindrome made by the product of two 3-digit numbers
package testing.project; package testing.project; public class palindromeThreeDigits { public static void main(S…… -
Java – when comparing two equal integers in a while loop, does the equal operator fail?
I post two examples below Example 1: Integer myVar1 = 42985; Integer myVar2 = 1; while (true) { if (myVar2 …… -
Java regular expression performance
I'm trying to parse links with regular expressions in Java But I think it's getting too slow For example, to extract a…… -
Suspend and resume the main thread in C for windows
I need to be able to pause and resume the main thread in Windows C applications I used it handle = GetCurrentThread();…… -
Java – button with rounded corners in Android
I want to create buttons such as the register and login buttons >Using shape drawable The results so far are not sa…… -
How to map a vector to a map and push duplicate key values into it?
This is my input data: [[:a 1 2] [:a 3 4] [:a 5 6] [:b \a \b] [:b \c \d] [:b \e \f]] I want to map this to the followi…… -
Java – it is not a good practice to use arrays as parameters to return multiple values
I sometimes (actually, often) find myself using a single element array to return multiple values from a method Somethi…… -
How do we divide integers into vectors in r that make up numbers
I think an example should make things clear I have I would like some_ 1 to the following a_ Function of 2 Solution Con…… -
How to use java to move the mouse smoothly across the screen?
There is a MouseMove () method that causes the pointer to jump to that position I want to be able to move the mouse sm…… -
What does a java thread do after running?
In a game, I'm using many instances of a thread, and it won't track them clientThread cT = new clientThread(socket); n…… -
Java – draw a point on the JPanel
Is there any way to use Java awt. The graphics class draws a point on JPanel? I can't find any such way There are many…… -
java. sql. Sqlexception: ora-00932: inconsistent data type: expected number to get binary
I have a method in Dao class that returns list < object [] > Back, I'm using named queries public List<Object…… -
When we assign integer to int in Java, why doesn’t the compiler make an error
When we assign integer (object) to int (primitive), why does the compiler not make an error? int i; Integer ii = new I…… -
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……