OVERVIEW
OpenJDK provides all the source code for the Java Development Kit but, to run an application compiled into bytecodes, you need a binary distribution of the JDK. OpenJDK does not provide any pre-built binary distributions.
GET STARTED
To verify the installation, follow the below instructions
Step 1. Connect to SSH
In a terminal window, use the ssh command to connect to the instance. You specify the user name for your instance, and the public DNS name or IPv6 address for your instance, the path and file name of the private key (.pem).
ssh admin@publicIP -i [Path of key pair file]If it shows an access denied message run the following command, then run the above command again to connect via ssh.
chmod 400 [Path of key pair file]Step 2. Verify the installation
Follow the steps to verify the OpenJDK installation
1. Login with ssh
2. Type the below command to check the version
java -version3. You will see the responses as shown below.
4. For example how to run an OpenJDK file on the terminal:
5. Run the command given below: sudo nano Hello.java 6. After that paste the code in the file given below :
public class Hello {
public static void main(String[] args) {
System.out.println("Hello World");
}
}7. Run the below command: javac Hello.java
8. After that run the below command: java Hello 9. Then you will get "Hello World " as an output
To monitor and assess application functions:-
a. Navigate to your Amazon EC2 console and verify that you're in the correct region.
b. Choose Instances and select your launched instance.
c. Select the server to display your metadata page and choose the Status checks tab at the
bottom of the page to review if your status checks passed or failed.
For information about how to use the application, please visit: https://www.tutorialspoint.com/java11/java11_environment.htm
For detailed information about managing and requesting increased service please visit: https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html
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