how to use “tab space” while writing in text file
You can use \t to create a tab in a file.
java
How to draw a circle with given X and Y coordinates as the middle spot of the circle?
The fillOval fits an oval inside a rectangle, with width=r, height = r you get a circle. If you want fillOval(x,y,r,r) to draw a circle with the center at (x,y) you will have to displace the rectangle by half its width and half its height. This will draw a circle with center at x,y
Java associative-array
Java doesn’t support associative arrays, however this could easily be achieved using a Map. E.g., Even more accurate to your example (since you can replace String with any object that meet your needs) would be to declare: See the official documentation for more information
“uses unchecked or unsafe operations” [duplicate]
Why am I getting “uses unchecked or unsafe operations” error everytime i compile? What’s wrong with the code? I copied the exact same code from this tutorial http://www.mkyong.com/java/json-simple-example-read-and-write-json/
Android Studio 2.2.3: Gradle project sync failed. Basic functionality (e.g. editting, debugging) will not work properly
Your gradle version is: 1.8 which is not working anymore so you probably have to update it: 1- Go to -> https://gradle.org/install check out the latest verion number. 2- In your project directory navigate to \gradle\wrapper\ directory and edit: gradle-wrapper.properties file. change: to: https://services.gradle.org/distributions/gradle-3.3-all.zip 3- go to Tools→Android→Sync Project with Gradle files 4- If sync doesn’t do the job restart Android studio
Can’t load IA 32-bit .dll on a AMD 64-bit platform
Yes, you’ll have to recompile the DLL for 64-bit. Your only other option is to switch to a 32-bit JVM, or otherwise get some 32-bit process to load the DLL on your behalf and communicate with that process somehow.
Could not find or load main class with a Jar File
I’m trying to load a jar using With the manifest of In the Jar directory, I can clearly see a classes\TestClass file when I extract it. Edit: classes.TestClass does have a public static void main(String[] args). Package Deceleration in classes.TestClass is package classes; But I still keep getting the error message I’ve been through everything … Read more
How to define a relative path in java
Here is the structure of my project : I need to read config.properties inside MyClass.java. I tried to do so with a relative path as follows : This gives me the following error : How can I define a relative path in Java? I’m using jdk 1.6 and working on windows.
return an ArrayList method
This is a drive method for two other classes. which i posted here https://codereview.stackexchange.com/questions/33148/book-program-with-arraylist I need some help for the private static ArrayList getAuthors(String authors) method. I am kind a beginner. so please help me finish this drive method. or give me some directions. Instruction some of the elements of the allAuthors array contain asterisks … Read more
Troubleshooting “The type parameter T is hiding the type T” warning
Do you somewhere have a class or interface named T, or are you using T as a concrete type name somewhere instead of as a type parameter (which means you might have forgotten somewhere else, for example in an enclosing class, to specify that T is a type parameter)? I can reproduce your problem with … Read more