Adding JDK "bin" Direcotry to Path Setting

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∟Adding JDK "bin" Direcotry to Path Setting

This section provides a tutorial on how to add JDK 'bin' directory to the 'path' system envirnoment variable.

In order to run Java tools by typing their program file name without the directory path name, I updated the "path" environment variable on my Windows computer:

Open "Control Panel > System and Security > System".
Click "Advanced system settings".
Click "Environment Variables".
Select "System variables > Path" and click "Edit".
Add "C:\Progra~1\java\jdk-17.0.1\bin" to the beginning of the current path list.
Click "OK" to save the change.

Then I ran the "echo %path%" command in a new command window to confirm the change:

herong> echo %path%

C:\Progra~1\java\jdk-17.0.1\bin;...

Now I should be able to run Java tool commands without the directory path name:

herong> java -version

java version "17.0.1" 2021-10-19 LTS
Java(TM) SE Runtime Environment (build 17.0.1+12-LTS-39)
Java HotSpot(TM) 64-Bit Server VM
  (build 17.0.1+12-LTS-39, mixed mode, sharing)

herong> javac hello.java

herong> java Hello
Hello world!

Now I am ready to play with Java tools included in Oracle JDK package!

Adding JDK bin Direcotry to Path Setting — Adding JDK "bin" Direcotry to Path Setting

You can also set a new environment variable called "java_home" to avoid typing the full path name to access Java tool program files:

herong> set java_home=C:\Progra~1\java\jdk-17.0.1

herong> %java_home%\bin\java -version

java version "17.0.1" 2021-10-19 LTS

If you are using a macOS computer, all Java commands are automatically linked to their latest versions. For example:

herong$ which java
 /usr/bin/java

herong$ ls -l /usr/bin/java

lrwxr-xr-x  1 root  wheel  74 Mar 23  2017 /usr/bin/java -> \
  /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java