How to retrieve environment variable values using JAVA.

In this article we mainly discus about how to retrieve environment    variable values using Java program. In java programing language has an   API  support to retrieve OS level variables.

In java language, by using System class getenv() method we  can retrieve environment variable values.

Syntax: static getenv(String name)

Filename: EnvironmentVaribaleTest.java
/** Class which is used to retrieve system environment vaiable values */
class EnvironmentVaribaleTest
{
 public static void main(String args[])
 {

        System.out.println("********************************************");
	System.out.println("**    System Environment Varibles         **");
	System.out.println("********************************************");

	System.out.println("JAVA_HOME ::"+System.getenv("JAVA_HOME"));
	System.out.println("CATALINA_HOME ::"+System.getenv("CATALINA_HOME"));
	

	System.out.println("********************************************");	

  }
}


OUTPUT:    

C:\corejava>javac EnvironmentVaribaleTest.java

C:\corejava>java EnvironmentVaribaleTest
********************************************
**    System Environment Varibles         **
********************************************
JAVA_HOME ::C:\Program Files (x86)\Java\jdk1.6.0_25
CATALINA_HOME ::C:\apache-tomcat-6.0.35\apache-tomcat-6.0.35
********************************************


Tags: core java,environment variables

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