How to Install Java on Ubuntu


java on ubuntu

Why Do I need to install? 

Java is a open source and platform independent programming language. First released by Sun Microsystems in 1995. Java used to develop programs that run on Windows, Linux and Mac computers. There are lots of software will not work unless Java installed.

What is JDK?

Java Development Kit(JDK) is used to develop java application. which is includes JRE, JVM, interpreter and compiler.

What is JRE?

Java Runtime Environment(JRE) is a set of java APIs used to develop java applications.

What is JVM?

Java Virtual Machine(JVM) is use to execute the java applications. JDK will generate byte-code(0's,1's) from our source code. JVM will execute the byte-code and show output.

Install Java 8

Step 1: Add Java Repository (PPA)
   sudo add-apt-repository ppa:webupd8team/java

java repository
Java Repository

Step 2: Update your Package 

   sudo apt-get update
Update Package
Update Package



Step 3: Install Java


   sudo apt-get install oracle-java8-installer



 if you need java 9 run following command


   sudo apt-get install oracle-java9-installer




java 8


Install Java






oracle configuration


Oracle Configuration












Configuration Confirmation


Configuration Confirmation








Step 4: Check Java Version




   java -version




Java Version


Java Version





 Step 5: Set Java 8 as default 


   sudo apt-get install oracle-java8-set-default




Set default java


Set default Java




 









 



 



 













































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