Java on Notities

Use of Golang, Java, C/C++, or Rust: A Quick Guide

Sat, 22 Mar 2025 19:32:21 +0000

For real-time applications, Go and Rust are the top choices due to their lightweight concurrency and memory efficiency. Combine them for a balanced approach: Go for high-level logic and Rust for performance-critical tasks. Use C/C++ for legacy systems and Java for enterprise-level applications where real-time performance is less critical.

When using Go, the chance of classic concurrency errors like race conditions, deadlocks, and resource leaks is significantly reduced. This is thanks to Go’s use of channels for safe communication between goroutines and its built-in garbage collector, which works seamlessly with the goroutine scheduler. This makes Go not only efficient but also more reliable and easier to debug in high-concurrency scenarios.

Java convert a variabele for it to be printed in a price format related to country settings

Sun, 05 Jan 2025 20:09:27 +0000

For Dutch Euro use: .getCurrencyInstance(new Locale(“nl”, “NL”))

For Swiss Franc use: .getCurrencyInstance(new Locale(“de”, “CH”))

import java.text.NumberFormat;
import java.util.Locale;


public class prog_002_variables {
 
 public static void main(String[] args){

 String message;
 int year;
 double prijs;

 message = "De beste wensen voor: ";
 year = 2025;
 prijs = 2.50;

 // Combine the creation of the Locale and the NumberFormat in one line
 NumberFormat currencyFormat;
 
 currencyFormat = NumberFormat.getCurrencyInstance(new Locale("nl", "NL"));
 System.out.println(message + year + ", een frikandel kost nu: " + currencyFormat.format(prijs));

 currencyFormat = NumberFormat.getCurrencyInstance(new Locale("de", "CH"));
 System.out.println(message + year + ", een frikandel kost nu: " + currencyFormat.format(prijs));

 }

}

Multiple versions of Java on macOS

Wed, 27 Sep 2023 17:43:18 +0000

$ ls -al /usr/local/opt/ | grep -i openjdk

$ brew install jenv

$ jenv add /Library/Java/JavaVirtualMachines/openjdk-17.jdk/Contents/Home/

$ jenv versions
$ jenv local 1.8
$ java -version
$ jenv global 1.8
$ java -version
$ jenv shell 1.8
$ java -version
$ jenv versions