Ubuntu installed Oracle JDK1.8

1. Put the downloaded jdk1.8.0_161.tar.gz in the Ubuntu directory / usr / java directory

2. Unzip: Tar -ZXVF JDK1.8.0_161.tar.gz

3. Set an environment variable:

You can choose to modify the global profile, just apply the current user profile, just act on the current user, the former I choose, modify / etc / profile file, vi / etc / profile, add:

Export java_home = / usr / java / jdk1.8.0_161

Export jre_home = $ {java_home} / jre

Export classpath =.: $ {java_home} / lib: $ {jre_home} / lib

Export path =.: $ {java_home} / bin: $ PATH

4. Keep the modified configuration right away: Source / etc / profile

5. Check if the installation is successful: java -version

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