RxJava - Environment Setup
RxJava is java library. TO work with RxJava we need first Java.
Environment Setup
Verify Java Installation
Open the console and execute a java command
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Windows -> c:\> java -version
Linux -> $ java -version
Mac -> machine:< joseph$ java -version
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It will returns java version if it installed.
If you do not have Java installed on your system, then download the Java Software Development Kit (SDK) from the following link https://www.oracle.com. We are assuming Java 1.8.0_101 as the installed version for this tutorial
Set JAVA Environment
Set the JAVA_HOME environment variable to point to the base directory location where Java is installed on your machine. For example
| OS |
Output |
| Windows |
Set the environment variable JAVA_HOME to C:\Program Files\Java\jdk1.8.0_101 |
| Linux |
export JAVA_HOME = /usr/local/java-current |
| Mac |
export JAVA_HOME = /Library/Java/Home |
Append Java compiler location to the System Path.
| OS |
Output |
| Windows |
Append the string C:\Program Files\Java\jdk1.8.0_101\bin at the end of the system variable, Path. |
| Linux |
export PATH = $PATH:$JAVA_HOME/bin/ |
| Mac |
not required |
Download RxJava2
Download the latest version of RxJava jar file from RxJava @ MVNRepository and its dependency Reactive Streams @ MVNRepository . At the time of writing this tutorial, we have downloaded rxjava-2.2.19.jar, reactive-streams-1.0.3.jar
Set RxJava Environment
| Sr.No |
OS & Description |
| 1 |
Windows
Set the environment variable RX_JAVA to C:\RxJava
|
| 2 |
Linux
export RX_JAVA = /usr/local/RxJava
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| 3 |
Mac
export RX_JAVA = /Library/RxJava
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Set CLASSPATH Variable
| Sr.No |
OS & Description |
| 1 |
Windows
Set the environment variable CLASSPATH to %CLASSPATH%;%RX_JAVA%\rxjava-2.2.19.jar;%RX_JAVA%\reactive-streams-1.0.3.jar;.;
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| 2 |
Linux
export CLASSPATH = $CLASSPATH:$RX_JAVA/rxjava-2.2.19.jar:reactive-streams-1.0.3.jar:.
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| 3 |
Mac
export CLASSPATH = $CLASSPATH:$RX_JAVA/rxjava-2.2.19.jar:reactive-streams-1.0.3.jar:.
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Verify RxJava by simple Example
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public class RXJava {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
Observable observer = Observable.just("Hello RxJava"); // provides datea
observer.subscribe(s -> System.out.println(s));
}
}
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Output
