Java Tools Tutorials - Herong's Tutorial Examples - v6.21, by Dr. Herong Yang
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:
Then I ran the "echo %path%" command in a new command window to confirm the change:
herong> echo %path% C:\Progra~1\java\jdk-12.0.1\bin;...
Now I should be able to run Java tool commands without the directory path name:
herong> java -version java version "12.0.1" 2019-04-16 Java(TM) SE Runtime Environment (build 12.0.1+12) Java HotSpot(TM) 64-Bit Server VM (build 12.0.1+12, 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!
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-12.0.1 herong> %java_home%\bin\java -version java version "12.0.1" 2019-04-16 Java(TM) SE Runtime Environment (build 12.0.1+12) Java HotSpot(TM) 64-Bit Server VM (build 12.0.1+12, mixed mode, sharing)
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
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