Install and Configure Java 11 Development Kit (JDK) 2019 - Java Programming Tutorials 2019

The PATH is the system variable that your operating system uses to locate needed executables from the command line or Terminal window.
The PATH system variable can be set using System Utility in control panel on Windows, or in your shell's startup file on Linux and Solaris.

Windows 10 and Windows 8
1. In Search, search for and then select: System (Control Panel)
2. Click the Advanced system settings link.
3. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
4. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable (e.g. C:\Program Files\Java\jdk-11.0.2\bin;). Click OK. Close all remaining windows by clicking OK.
5. Reopen Command prompt window, and run your java code.


Windows 7
1. From the desktop, right click the Computer icon.
2. Choose Properties from the context menu.
3. Click the Advanced system settings link.
4. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
5. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable (e.g. C:\Program Files\Java\jdk-11.0.2\bin;). Click OK. Close all remaining windows by clicking OK.
6. Reopen Command prompt window, and run your java code.


Windows Vista
1. From the desktop, right click the My Computer icon.
2. Choose Properties from the context menu.
3. Click the Advanced tab (Advanced system settings link in Vista).
4. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
5. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable (e.g. C:\Program Files\Java\jdk-11.0.2\bin;). Click OK. Close all remaining windows by clicking OK.
6. Reopen Command prompt window, and run your java code.


Windows XP
1. Select Start, select Control Panel. double click System, and select the Advanced tab.
2. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
3. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable (e.g. C:\Program Files\Java\jdk-11.0.2\bin;). Click OK. Close all remaining windows by clicking OK.
4. Reopen Command prompt window, and run your java code.


Mac OS X
To run a different version of Java, either specify the full path, or use the java_home tool:
% /usr/libexec/java_home -v jdk-11.0.2 --exec javac -version


Solaris and Linux
1. To find out if the path is properly set:
In a terminal windows, enter:
% java -version
This will print the version of the java tool, if it can find it. If the version is old or you get the error java: Command not found, then the path is not properly set.
2. Determine which java executable is the first one found in your PATH
In a terminal window, enter:
% which java
Set the PATH permanently
To set the path permanently, set the path in your startup file.
Note: Instructions for two most popular Shells on Linux and Solaris are listed below. If you are using other shells, there will be a similar method for achieving the same results.


Bash Shell
Edit the startup file (~/.bashrc)
1. Modify PATH variable
PATH=/usr/local/jdk-11.0.2/bin:$PATH
export PATH
2. Save and close the file
3. Load the startup file
% . /.profile
4. Verify that the path is set by repeating the java command
% java -version


C Shell (csh)
Edit the startup file (~/.cshrc)
1. Set Path
set path=(/usr/local/jdk-11.0.2/bin $path)
2. Save and close the file
3. Load the startup file
% source ~/.cshrc
4. Verify that the path is set by repeating the java command
% java -version