2019 年 11 月 – APPX Tech 時賦科技 Blog

For Mac OSX 10.5 or later

In Mac OSX 10.5 or later, Apple recommends to set the $JAVA_HOME variable to /usr/libexec/java_home,
just export $JAVA_HOME in file ~/. bash_profile or ~/.profile.

$ vim .bash_profile 

<span class="token function">export</span> JAVA_HOME<span class="token operator">=</span><span class="token variable">$(/usr/libexec/java_home)
</span>

$ <span class="token function">source</span> .bash_profile

$ <span class="token keyword">echo</span> <span class="token variable">$JAVA_HOME</span>
/Library/Java/JavaVirtualMachines/1.8.0.jdk/Contents/Home

$ vim .bash_profile

export JAVA_HOME=$(/usr/libexec/java_home)

$ source .bash_profile

$ echo $JAVA_HOME

/Library/Java/JavaVirtualMachines/1.8.0.jdk/Contents/Home

For Linux

For each user, user can add the java path in ~/. bash_profile or ~/.profile.
For all users, system admin can add the java path in /etc/profile

To find java path location, try one of followings

update-java-alternatives -l
cd /
find . -name ‘javac’ //might need root privilege
alternatives –display java
sudo update-alternatives –config java
Or take look at the following

– /usr/local/java/jdk[version]
– /usr/lib/jvm/java-1.11.0-openjdk-amd64
– /usr/lib/jvm/java-1.8.0-openjdk

Once the JDK path is found, we can add into ~/.bash_profile or ~/.profile as following,

export JAVA_HOME=”path that you found”

export PATH=$JAVA_HOME/bin:$PATH

For Windows (*Reference : mkyong blog

Find System Properties (*My Computer > Right Click > Properties)

Add JAVA_HOME

ADD JAVA Bin PATH //Window 7

ADD JAVA Bin PATH //Window 10

Last Step, Let’s run some test

C:\Users\FRank<span class="token operator">&gt;</span>java -version
java version <span class="token string">"1.8.0_231"</span>
Java<span class="token punctuation">(</span>TM<span class="token punctuation">)</span> SE Runtime Environment <span class="token punctuation">(</span>build 1.8.0_231<span class="token punctuation">)</span>

C:\Users\FRank<span class="token operator">&gt;</span>javac -version
javac 1.8.0_231

C:\Users\FRank<span class="token operator">&gt;</span>echo %JAVA_HOME%
C:\Program Files\Java\jdk1.8.0_231

C:\Users\FRank>java -version

java version "1.8.0_231"

Java(TM) SE Runtime Environment (build 1.8.0_231)

C:\Users\FRank>javac -version

javac 1.8.0_231

C:\Users\FRank>echo %JAVA_HOME%

C:\Program Files\Java\jdk1.8.0_231

以上為安裝JDK 軟體後，需做的基本路徑設定。
也希望對各位初學者或是想找路徑的朋友有些幫助 ~

以上

時賦科技 FRank

月份: 2019 年 11 月

Java Path Setup / Java 路徑設定

For Mac OSX 10.5 or later

For Linux

For Windows (*Reference : mkyong blog