Install JDK and environment variable configuration in Ubuntu

Install JDK and environment variable configuration in Ubuntu

Objective: To install JDK and environment variable configuration in Ubuntu

1. getconf LONG_BIT: view the number of system digits and download the corresponding jdk.
My Ubuntu system is 32-bit, so the downloaded jdk is: jdk-8u77-linux-i586.gz.
And stored in the/home/injavawetrust/software Directory.

2. Create a directory/usr/lib/jvm to put the downloaded and decompressed package in this directory.
Cd/usr/lib
Sudo mkdir jvm

3. decompress and put the decompressed jdk folder in the/usr/lib/jvm directory.
Cd/home/injavawetrust/software
Sudo tar zxvf jdk-8u77-linux-i586.gz-C/usr/lib/jvm

4. Go to the/usr/lib/jvm directory.
Cd/usr/lib/jvm

5. Rename the decompressed jdk folder to java1.8.
Sudo mv jdk1.8.0 _ 77 java1.8

6. first enter the vi editor, and then enter the following command
Vi ~ /. Bashrc
The command entered in the open file is as follows:

 
7. Run the following command:
Source ~ /. Bashrc

8. Test
Java-version

The following information is displayed:
Java version "1.8.0 _ 77"
Java (TM) SE Runtime Environment (build 1.8.0 _ 77-b03)
Java HotSpot (TM) Client VM (build 25.77-b03, mixed mode)

Jdk is installed successfully.

9. Test the written java code.

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