Java
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Java – how do I rotate a rectangle in libgdx?
I rotate my sprites 90 degrees. I want to do the same for my rectangles so that they can be used for collisions, but t…… -
Java – use the ‘super’ keyword when accessing non overridden superclass methods
I've tried to get inheritance rights in Java and have learned that when overriding methods (and hidden fields) in subc…… -
Java – how do I get the method name from this method?
I tried to create a function that returns the method name from this method: public static String getmethodName(final i…… -
How do I replace a string in Java that contains dot?
I need to replace the string that contains spaces and periods I tried the following code: String customerName = "Mr. R…… -
Java – how to group / classify a large number of JUnit tests
In our project, we currently have a large number of JUnit tests, which are divided into three categories: unit, integr…… -
Bitshifting using BigIntegers in Java
I am using BigIntegers to implement DES encryption in Java I execute BigInteger The leftshift (int n) method shifts th…… -
Java – set reference = null in the finally block?
One of my colleagues set null in the finally block I think this is nonsense public Something getSomething() { JDBC…… -
Java – how to check if a class exists
Is there a static method of 'class' that can tell us whether the user input class (in the form of string) is a valid e…… -
Java – change the app name in eclipse
I finished my quiz application a few days ago Now, I want to release a second quiz with different questions I copied t…… -
Are the following incremental code threads safe in Java?
Java code: public class IncreaseTest { public static int value = 0; public synchronized int increment() { …… -
java. lang.Math. Is pi equal to m of GCC_ PI？
I have written several reference algorithms in Java and C / C + + Some of these algorithms use π I want two implementa…… -
Email template library in Java
I know that there is a library called FreeMarker that can create email templates for Java Do you think this library is…… -
Java – how JPA adds a unique constraint on the column of the @ onetomany relationship, for example, on the user name
I have a class website representing websites and class users The site can have multiple users class Site { privat…… -
How to parse this JSON response in Java
I want to parse these JSON responses: { "MyResponse": { "count": 3,"listTsm": [{ "id": "b90c6218-73c8-30bd…… -
Java – multiplication overflow of two ints results in negative numbers
Consider this fragment in the Java language specification class Test { public static void main(String[] args) { …… -
Java – why is char implicitly converted to byte (and short) primitives and when should it not?
Some features of the compiler puzzled me (using Oracle JDK 1.7 of eclipse) Therefore, I have this book that char primi…… -
How to use xwpftable in POI to merge cells (or apply colSpan) in Java?
Creating a table in POI is very simple, but its tutorial is very limited. I can't find a simple merged cell in the tab…… -
Java – cookie domain contains dot?
I use GWT's cookies class to generate cookies When I use the following Cookies.setCookie(LOGIN_COOKIE_NAME,value,expir…… -
Java – how to get latitude and longitude information from a picture
How to obtain longitude and latitude information from the picture storage in the device or SD card? Solution I found a…… -
Java – fastvector type is not recommended
I tried to get an arrf extension output file from a multidimensional array in Java I imported the Weka library, but I …… -
Java – LinearLayout: align with the right of the parent object
Consider the following XML <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas…… -
java – vert. How is x single threaded?
According to my understanding, every vert X instances will be assigned an event loop Event loops handle all requests a…… -
Java – spring rest security – protects different URLs in different ways
I use the rest API for basic authentication under spring 4 These rest services are located under / API / V1 / * * URL …… -
Close the Java program correctly when jdialog is the main window
I have a jdialog as the main window in my application (initially it was a JFrame, but it showed in the taskbar that I …… -
Will the “count limit” expression of the Java – for loop be evaluated only once, or each iteration?
If I call the method in the conditional statement of the loop, do I call it at every iteration of the loop? For exampl…… -
Java – what’s wrong with this clone()?
I have written this cloning method when the parent class of the Employee class is abstract and the clone () method in …… -
Does every program in Java need a class?
Is this always the case? Solution Yes, you need at least one class to have a program, but no, you don't need any metho…… -
I shouldn’t do ` string s = new string (“a new string”)` In Java, even automatic string practice?
Well, this problem is an extension of this problem Java Strings: “String s = new String(“silly”);” The above question …… -
Java – how to split without regular expressions
In my java application, I need to use the same "target" to find the index and split the string in both cases The goal …… -
How to use Java’s org w3c. dom. Get text from node_ TagName for node
In the interface's documentation, it declares that text nodes return "#text" as their name instead of the actual tag n…… -
Java gets the first two decimal digits of a double
I have a huge double, and I want to get the first two decimal numbers as floating point numbers Here is an example: do…… -
java – kryo. ReadObject causes NullPointerException with ArrayList
When I use kryo to deserialize the ArrayList object, I get a NullPointerException Caused by: java.lang.NullPointerExce……