在 Ubuntu 透過 WebUpd8 team ppa 安裝 Java：

sudo add-apt-repository ppa:webupd8team/java
sudo apt update
sudo apt install oracle-java9-installer

安裝的過程中遇到 404 Not found 問題。

錯誤內容：

Downloading Oracle Java 9...
--2017-10-19 08:41:59--  http://download.oracle.com/otn-pub/java/jdk/9+181/jdk-9_linux-x64_bin.tar.gz
Resolving download.oracle.com (download.oracle.com)... 210.61.248.163, 210.61.248.216
Connecting to download.oracle.com (download.oracle.com)|210.61.248.163|:80... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://edelivery.oracle.com/otn-pub/java/jdk/9+181/jdk-9_linux-x64_bin.tar.gz [following]
--2017-10-19 08:41:59--  https://edelivery.oracle.com/otn-pub/java/jdk/9+181/jdk-9_linux-x64_bin.tar.gz
Resolving edelivery.oracle.com (edelivery.oracle.com)... 104.116.18.92, 2600:1417:1b:188::2d3e, 2600:1417:1b:184::2d3e
Connecting to edelivery.oracle.com (edelivery.oracle.com)|104.116.18.92|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: http://download.oracle.com/otn-pub/java/jdk/9+181/jdk-9_linux-x64_bin.tar.gz?AuthParam=1508373839_4021b0b2a88845635225f537490b9b5a [following]
--2017-10-19 08:42:00--  http://download.oracle.com/otn-pub/java/jdk/9+181/jdk-9_linux-x64_bin.tar.gz?AuthParam=1508373839_4021b0b2a88845635225f537490b9b5a
Connecting to download.oracle.com (download.oracle.com)|210.61.248.163|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2017-10-19 08:42:01 ERROR 404: Not Found.

download failed
Oracle JDK 9 is NOT installed.
dpkg: error processing package oracle-java9-installer (--configure):
 subprocess installed post-installation script returned error exit status 1
E: Sub-process /usr/bin/dpkg returned an error code (1)

在等待官方之餘，嘗試先自己修改 deb 來解決這個問題。

Solution

Install tools

先安裝 tool：

sudo apt install apt-src

接下來，修改 /etc/apt/sources.list.d/webupd8team-ubuntu-java-xenial.list，取消 deb-src 的註解：

deb http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main
deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main

然後更新 apt-src 的資料庫：

sudo apt-src update

Download deb source

下載 oracle-java9-installer 的 deb source：

mkdir ~/oracle-java
cd ~/oracle-java
sudo apt-src install oracle-java9-installer

這邊還是會再出現一次錯誤，不過可以忽略。

Modify deb file

Step 1

先到 Oracle 官網去確認安裝檔的路徑：

安裝檔 jdk-9.0.1_linux-x64_bin.tar.gz 的下載位址為：http://download.oracle.com/otn-pub/java/jdk/9.0.1+11/jdk-9.0.1_linux-x64_bin.tar.gz

編輯 ~/oracle-java/oracle-java9-installer-9b181/debian/oracle-java9-installer.postinst:

將 JAVA_VERSION_MAJOR (line 68) 修改成 9.0.1
將 J_DIR (line 71) 修改成 jdk-9.0.1
將 JAVA_VERSION_MINOR (line 69) 修改成 11

Ex:

if [ ! $arch = "arm" ]; then
  JAVA_VERSION_MAJOR=9 #
  JAVA_VERSION_MINOR=181 #must be modified for each release
  JAVA_VERSION_DATE="04_nov_2015" #no longer needed with b95
  J_DIR=jdk-9 #must be modified for each release
  FILENAME=jdk-${JAVA_VERSION_MAJOR}_linux-${dld}_bin.tar.gz # jdk-9_linux-x64_bin.tar.gz
  PARTNER_URL=http://download.oracle.com/otn-pub/java/jdk/${JAVA_VERSION_MAJOR}+${JAVA_VERSION_MINOR}/$FILENAME
else
  JAVA_VERSION_MAJOR=9.0.1 #
  JAVA_VERSION_MINOR=11 #must be modified for each release
  JAVA_VERSION_DATE="04_nov_2015" #no longer needed with b95
  J_DIR=jdk-9.0.1 #must be modified for each release
  FILENAME=jdk-${JAVA_VERSION_MAJOR}_linux-${dld}_bin.tar.gz # jdk-9+109_linux-arm64-vfp-hflt_bin.tar.gz
  PARTNER_URL=http://download.oracle.com/otn-pub/java/jdk/${JAVA_VERSION_MAJOR}+${JAVA_VERSION_MINOR}/$FILENAME
fi

Step 2

根據 Oracle 官網的 checksum 表：

修改 SHA256SUM_TGZ (line 24) 的值：

Ex:

case $(dpkg --print-architecture) in
'i386'|'i586'|'i686')
  #arch=i386; dld=x86;
  #SHA256SUM_TGZ="ba0c77644ece024cdb933571d79f0f035e91a9c9ab70de9c82446c9fbd000c97" #must be modified for each release
  echo "Error. Oracle Java 9 does not support 32bit."
  ;;
'amd64'  ) arch=amd64; dld=x64;
  SHA256SUM_TGZ="2cdaf0ff92d0829b510edd883a4ac8322c02f2fc1beae95d048b6716076bc014" #must be modified for each release
  ;;

Build deb

接下來開始 build deb 檔：

apt-src build oracle-java9-installer

完成之後，會在目錄下看到三個 deb 檔：

oracle-java9-installer_9b181-1~webupd8~2_amd64.deb
oracle-java9-unlimited-jce-policy_9b181-1~webupd8~2_amd64.deb
oracle-java9-set-default_9b181-1~webupd8~2_amd64.deb

Install Oracle Java

sudo dpkg -i oracle-java9-installer_9b181-1~webupd8~2_amd64.deb
sudo apt install oracle-java9-set-default

Fix the Oracle Java installation on Ubuntu 16.04