在debian9.3下面安裝與設置Oracle jdk1.8的最好方法

1、ssh login到debian9 系統

2、切換到rott用戶：sudo su- OR su –

3、下載oracle jdk1.8

###32 bit ###

# wget –no-check-certificate –no-cookies –header “Cookie: oraclelicense=accept-securebackup-cookie” http://download.oracle.com/otn-pub/java/jdk/8u152-b16/aa0333dd3019491ca4f6ddbe78cdb6d0/jdk-8u152-linux-i586.tar.gz

### 64 Bit ###

4、解壓jdk.tar.gz 文件並移到/usr/local/目錄：

#tar -zxvf jdk-8u*-linux-*.tar.gz

# mv jdk1.8.*/ /usr/local/

5、安裝oracle jdk1.8

# update-alternatives –install /usr/bin/java java /usr/local/jdk1.8.*/bin/java 2

# update-alternatives –config java

6、選擇那oracle jdk1.8

There are 2 choices for the alternative java (providing /usr/bin/java).

Selection Path Priority Status

————————————————————

* 0 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 auto mode

1 /usr/local/jdk1.8.0_152/bin/java 2 manual mode

2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode

Press to keep the current choice[*], or type selection number: 1

update-alternatives: using /usr/local/jdk1.8.0_152/bin/java to provide /usr/bin/java (java) in manual mode

7、確認JAVA 版本：

# java –version

輸出:

java version “1.8.0_152”

Java(TM) SE Runtime Environment (build 1.8.0_152-b16)

Java HotSpot(TM) 64-Bit Server VM (build 25.152-b16, mixed mode)

8、環境變量設置：

用vi 打開並編輯「/etc/profile」文件，並增加以下內容：

# export JAVA_HOME=/usr/local/jdk1.8.0_*

# export JRE_HOME=/usr/local/jdk1.8.0_*/jre/

# export PATH=$JAVA_HOME/bin:$PATH

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