Ubuntu 16.04/Linux 安裝 Oracle Java 8的教程

oracle資料安裝包下載

https://www.oracle.com/downloads/

java 8安裝包下載

https://launchpad.net/~webupd8team/+archive/ubuntu/java

檢查java是不是安裝過了

$ java -version
java version "1.7.0_95"
OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.15.10.1)
OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)

1. Setup the PPA

$ sudo apt-add-repository ppa:webupd8team/java
$ sudo apt-get update

2. 開始安裝 Java 8 installer

$ sudo apt-get install oracle-java8-installer

$ java -version
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)

3.安裝Oracle Java

$ sudo apt-get install oracle-java8-set-default

4.安裝OpenJDK package

$ sudo apt-get purge openjdk-*