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Contents
  1. 1. Setup Java Development Environment in Ubuntu
    1. 1.1. Install Oracle Java on Ubuntu Linux
    2. 1.2. 1. Check to see if your Ubuntu Linux operating system architecture is 32-bit or 64-bit
    3. 1.3. 2. Check if you have Java installed on your system
    4. 1.4. 3. Completely remove the OpenJDK/JRE from your system and create a directory to hold your Oracle Java JDK/JRE binaries.
    5. 1.5. 4.Check##

Setup Java Development Environment in Ubuntu

Ubuntu: ubuntu-16.04-desktop-amd64

Install Oracle Java on Ubuntu Linux

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# apt-get upgrade -y
# apt-get install ssh -y

1. Check to see if your Ubuntu Linux operating system architecture is 32-bit or 64-bit

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root@stan-virtual-machine:~# file /sbin/init
/sbin/init: symbolic link to /lib/systemd/systemd
root@stan-virtual-machine:~# file /lib/systemd/systemd
/lib/systemd/systemd: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=03b9d43299696aa6b67b92f1225fa6045b978cb2, stripped

2. Check if you have Java installed on your system

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root@stan-virtual-machine:~# java -version
The program 'java' can be found in the following packages:
 * default-jre
 * gcj-5-jre-headless
 * openjdk-8-jre-headless
 * gcj-4.8-jre-headless
 * gcj-4.9-jre-headless
 * openjdk-9-jre-headless
Try: apt install <selected package>

3. Completely remove the OpenJDK/JRE from your system and create a directory to hold your Oracle Java JDK/JRE binaries.

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root@stan-virtual-machine:~# apt-get purge openjdk-\*
root@stan-virtual-machine:~# mkdir -p /usr/local/java

Go to link: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
download http://download.oracle.com/otn-pub/java/jdk/8u101-b13/jdk-8u101-linux-x64.tar.gz

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root@stan-virtual-machine:/home/stan/Downloads# cp -r jdk-8u101-linux-x64.tar.gz /usr/local/java

# tar xvzf jdk-8u101-linux-x64.tar.gz
# vim /etc/profile     #add into end of the file
JAVA_HOME=/usr/local/java/jdk1.8.0_101
JRE_HOME=$JAVA_HOME/jre
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH

# update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_101/jre/bin/java" 1
# update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.8.0_101/bin/javac" 1
# update-alternatives --set java /usr/local/java/jdk1.8.0_101/jre/bin/java
# update-alternatives --set javac /usr/local/java/jdk1.8.0_101/bin/javac
source /etc/profile

4.Check##

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root@stan-virtual-machine:/usr/local/java# java -version
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)
root@stan-virtual-machine:/usr/local/java# javac -version
javac 1.8.0_101
Contents
  1. 1. Setup Java Development Environment in Ubuntu
    1. 1.1. Install Oracle Java on Ubuntu Linux
    2. 1.2. 1. Check to see if your Ubuntu Linux operating system architecture is 32-bit or 64-bit
    3. 1.3. 2. Check if you have Java installed on your system
    4. 1.4. 3. Completely remove the OpenJDK/JRE from your system and create a directory to hold your Oracle Java JDK/JRE binaries.
    5. 1.5. 4.Check##