Install the JRE environment in ubuntu 14.04, 14.04jre

Install the JRE environment in ubuntu 14.04, 14.04jre

It took me one morning to finally install the latest jre. It's not easy. I 've experienced countless failures. I really want to give myself a thumbs up !!!

1. Download the jre installation package

Web http://www.java.com/en/download/manual.jsp

On the above page, find the linux Section

Select linux x64 and download it. Be sure to write the 64-bit version to prepare for installing the java Plug-in firefox later.

2. Install jre

Find the downloaded file and decompress it:

sudo tar -zxvf jre*.tar.gz

Create a JAVA library directory:

mkdir /usr/lib/java

Move the file to a folder:

sudo mv jre* /usr/lib/java/

Modify environment variables:

Many friends like to modify/etc/environment. This is a system-level modification, which is effective for any user. We do not recommend that you directly modify system-level files.

It should be modified according to the process of configuring the user environment in linux ~ /. Profile file. This is the file that the system will automatically execute for you when each user logs in. This will not affect other users. This is important !!!

vim ~/.profile

Add the following content

Export JAVA_HOME = "/usr/lib/java/jre1.7.0 _ 67"
Export CLASSPATH = "$ JAVA_HOME/lib"
Export PATH = "$ JAVA_HOME/bin": $ PATH

Update the configuration file immediately on the terminal:

source ~/.profile

Now the environment variable has changed. How are you doing. Enter the following command to test:

echo $PATH

Isn't there any more java !!!

The most critical step is to enter:

sudo update-alternatives --install /usr/bin/java java /usr/lib/java/jre1.7.0_67/bin/java 300

Check whether the current JAVA environment has been installed:

java -version

3. Allow firefox to support java

A command is enough: (first, go to the/usr/lib/mozilla/plugins/directory !)

sudo cp -a /usr/lib/java/jre*/lib/amd64/libnpjp2.so

4. Check if the load is successful in firefox!

In the firefox address bar, enter:

About: plugins

Success!

Ubuntu1404 install the jre Environment

Sudo apt-get install openjdk-7-jre
Or
Sudo apt-get install openjdk-8-jre
The two commands are only different in java version.
After installation, you do not need to set or restart anything,
Can be used directly ~
 
How to install jre in ubuntu

Command installation:
Sudo apt-get install default-jre or open the Software Center and search for jre for installation.