Java Exercises: Get the value of the environment variable PATH, TEMP, USERNAME
Java Basic: Exercise-90 with Solution
Write a Java program to get the value of the environment variable PATH, TEMP, USERNAME.
Sample Solution:
Java Code:
import java.lang.*;
public class Exercise90 {
public static void main(String[] args)
{
// gets the value of the specified environment variable "PATH"
System.out.println("\nEnvironment variable PATH: ");
System.out.println(System.getenv("PATH"));
// gets the value of the specified environment variable "TEMP"
System.out.println("\nEnvironment variable TEMP: ");
System.out.println(System.getenv("TEMP"));
// gets the value of the specified environment variable "USERNAME"
System.out.println("\nEnvironment variable USERNAME: ");
System.out.println(System.getenv("USERNAME"));
}
}
Sample Output:
Environment variable PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games :/usr/local/games Environment variable TEMP: null Environment variable USERNAME: null
Flowchart:

Java Code Editor:
Contribute your code and comments through Disqus.
Previous: Write a Java program to check whether a security manager has already been established for the current application or not.
Next: Write a Java program to measure how long some code takes to execute in nanoseconds.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
Java: Tips of the Day
countOccurrences
Counts the occurrences of a value in an array.
Use Arrays.stream().filter().count() to count total number of values that equals the specified value.
public static long countOccurrences(int[] numbers, int value) { return Arrays.stream(numbers) .filter(number -> number == value) .count(); }
Ref: https://bit.ly/3kCAgLb
- Exercises: Weekly Top 12 Most Popular Topics
- Pandas DataFrame: Exercises, Practice, Solution
- Conversion Tools
- JavaScript: HTML Form Validation
- SQL Exercises, Practice, Solution - SUBQUERIES
- C Programming Exercises, Practice, Solution : For Loop
- Python Exercises, Practice, Solution
- Python Data Type: List - Exercises, Practice, Solution
- C++ Basic: Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - exercises on Employee Database
- SQL Exercises, Practice, Solution - exercises on Movie Database
- SQL Exercises, Practice, Solution - exercises on Soccer Database
- C Programming Exercises, Practice, Solution : Recursion