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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:

Flowchart: Java exercises: Get the value of the environment variable PATH, TEMP, USERNAME

Java Code Editor:

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Java: Tips of the Day

initial:

Returns all the elements of an array except the last one. Use Arrays.copyOfRange() to return all except the last one

public static <T> T[] initial(T[] elements) {
    return Arrays.copyOfRange(elements, 0, elements.length - 1);
}

Ref: https://bit.ly/3zEKw9u