A Small Test after Installation of Android Studio

I recently installed Android Studio release 3.2.1 (for Windows 64-bit). That is the latest release at the time of writing.  The installation was smooth, and ended without error messages on my Windows 10 desktop.  Like Eclipse that I had fun with some years ago, Android Studio downloaded a lot of plug-in's after the initial installation. 

As a small test, I created the simplest "Hello World" type of project.  I entered a few lines of code and checked if they would be compiled well.  I launched the phone emulator of my choice (Google Pixel 2), and ran the app. The emulator displayed the number array according to my test code.



The installation of Android Studio was good.

In Android Studio, click Help > About, we can see the version information:



In addition to Android Studio version 3.2.1, we can see JRE (Java Runtime Environment) version 1.8.0_152-release.  That is a version number that I wanted to double check.

Before I started installing Android Studio, I already had JDK 11 (that is Java Development Kit version 11) on my computer.  Because of that, I preferred to check where the JDK bundled with Android Studio was located.  That was necessary because Android Studio uses that specific version of JDK to compile my code.

The JDK version that Android Studio uses is seen in File > Project Structure.

In the Project Structure window, check the JDK location.



The default JDK location is at C:\Program Files\Android Studio\jre

In that directory, I checked that...

The Java Compiler version is:
javac 1.8.0_152-release

The Java Runtime Environment is:
openjdk version "1.8.0_152-release"
OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
OpenJDK 64-Bit Server VM (build 25.152-b06, mixed mode)

Therefore it is clarified that Android Studio overrides the use of my original setup of JDK 11 by its older bundled version JDK 8 by default.  I have the option to specify my newer JDK location, however, Android Studio recommends using the embedded JDK.

Comments

Post a Comment

Popular posts from this blog

Finding Median by Stream

Image
This small waterfall is one of the many intermediate operations of the stream. Photo taken in Algonquin, ON The Java's DoubleStream class provides a few methods for common statistics including min(), max(), sum(), and average().  For average(), what does it actually mean?  Here is the description in the specification: The average() method returns an OptionalDouble describing the arithmetic mean of elements of the stream, or an empty optional if the stream is empty. While the arithmetic mean method is handy, we likely want a median method for different needs as well.  The DoubleStream class doesn't provide a median() method but the sorted() method.  We can use the sorted() method to assist in finding the median value. Building the Median Function Given each of existing min(), max(), and average() will return an OptionalDouble, having a median() method to return the same type is preferable.  There are different ways to create a median method, and the goal here is ...
Read more

Factorial by Different Styles in Java

Here is a collection of methods of calculating factorial by different programming styles. class Factorial { // Iteration static long iterativeFactorial( int n) { long r = 1; for ( int i=1; i<=n; i++) r*=i; return r; } // Recursion static long recursiveFactorial( int n) { return n == 0 ? 1 : n * recursiveFactorial(n-1); } // Tail-recursion static long tailRecurFactorial( int n) { return tailRecurHelper(1L, n); } static long tailRecurHelper( long acc, int n) { return n == 0 ? acc : tailRecurHelper(acc*n, n-1); } // Lambda and Recursion static Function<Integer, Long> lambdaRecurFactorial = x -> x==0 ? 1L : x * Factorial.lambdaRecurFactorial.apply(x-1); // Stream static long streamFactorial ( int n) { return LongStream.rangeClosed(1, n) .reduce(1, (a, b) -> a*b); } /...
Read more

Reduction by Java Stream

For business analysis, it is often useful to reduce a list of numbers to a single value. "What is the sum of product A sold among all the invoices?" "What is the median price among all the houses sold in Toronto last month?" "What is the average annual inflation over the last 10 years?" This type of queries is reduction operation that can be handled by the Stream class.  Below are some examples to help memorizing how the reduce  method is used. Here are three different functions of calculating the sum of a list of integers. The first function is a typical for-loop.  The second and third produce the same result by using stream's reduce . Compare the functions for mnemonic.  List<Integer> list = Arrays.asList(2, 4, 6, 8, 10, 12, 14, 16); Function<List<Integer>, Integer> sumMethod1 = (numbers) -> { int sum = 0; for (Integer x : numbers) sum += x; return sum; }; System.out.println ( "sum = " + sumMethod1.apply(l...
Read more