Install and configure the Java environment in Ubuntu16.04LTS

We know that openjdk may be installed in Ubuntu in advance. However, I am used to Oraclejdk. ##& Lt; uninstall openjdk & gt; ### Terminalcommand: sudoapt-getpurgeopenjdk/openjdk *; sudoapt-getclean/autoclean; we should delete openjdk from the system. # & Lt; download and install O

We know that openjdk may be installed in Ubuntu in advance. But I am used to Oracle jdk.

##< Uninstall openjdk>

### Terminal command: sudo apt-get purge openjdk/openjdk *; sudo apt-get clean/autoclean;

We should delete openjdk from the system.

# <Download and install Oracle jdk>

### Terminal command: tar-zxvf jdk-8u77-linux-x64.tar.gz;
Sudo mv./jdk-8u77-linux-x64/opt/Java

Download Oracle jdk needs to Oracle (http://www.oracle.com/) Oracle jdk official website (http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html), according to different operating systems provide different installation packages, download the corresponding software packages.

Decompress the package on the Ubuntu Desktop and move it to/opt/Java. In this way, a separate folder is provided for you to manage and set environment variables. So far, if everything is correct, then let'sSet Environment Variables.

# <Jdk environment variable Settings>

### Terminal command: sudo gedit/etc/profile; source/etc/profile

'''

Export JAVA_HOME =/opt/Java/java version

Export JRE_HOME =$ {JAVA_HOME}/jre

Export CLASSPATH =.: java h ome/lib: JAVAHOME/lib: {JRE_HOME}/lib

Export PATH = java h ome/bin: JAVAHOME/bin: PATH

'''

Test whether the environment variables are correctly set

'''

$ Java-version

$ Javac

'''

##< Install eclipse>

### Terminal command:
Sudo tar-zxvf eclipse=java%mars%2%linux%gtk%x86_64.tar.gz;
Mv./eclipse-java-mars-2-linux-gtk-x86_64

Eclipse, as an open-source software, is suitable for java development. Eclipse (http://www.eclipse.org/) Linux X64 version (http://mirrors.ustc.edu.cn/eclipse/technology/epp/downloads/release/mars/2/eclipse-java-mars-2-linux-gtk-x86_64.tar.gz). Unzip it and put it in the folder you feel suitable.

For more information about Ubuntu, see Ubuntu special page http://www.linuxidc.com/topicnews.aspx? Tid = 2

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