Java 8 application on EC2

Question

Keeping it simple I wish to know if we can install Java 8 on an EC2 instance? Java 8 should alone do the job for me.

Answer 1

If you want java 8 instantly on your AMI. I doubt that is possible out of box. You will be required to install it once you have an instance

Following posts may help you do so:

link1

link2

Answer 2

Before doing that you need to check the current version of java installed

java -version

install Java 1.8

sudo yum install java-1.8.0

change the Java version

sudo alternatives --config java

Now you can work with Java and you will have a current version of Java installed in your ec2 instance

Answer 3

To remove java 1.7 and install java 1.8:

sudo yum install java-1.8.0
sudo yum remove java-1.7.0-openjdk

Answer 4

Install Java Runtime 1.8

sudo yum install java-1.8.0

OR if you need a java compiler and other developer tools:

sudo yum install java-1.8.0-openjdk-devel

Then use the alternatives command to make Java 1.8 the default.

sudo /usr/sbin/alternatives --config java
sudo /usr/sbin/alternatives --config javac
# etc

You can remove Java 1.7 with

sudo yum remove java-1.7.0-openjdk

Answer 5

This set of command will serve the purpose
yum install java-1.8.0 -y
/usr/sbin/alternatives --set java /usr/lib/jvm/jre-1.8.0-openjdk.x86_64/bin/java
/usr/sbin/alternatives --set javac /usr/lib/jvm/jre-1.8.0-openjdk.x86_64/bin/javac
yum remove java-1.7.0-openjdk