Setting JAVA_HOME and PATH variables¶

Windows¶

We’ll explain here how to set up JAVA_HOME and PATH variables on Windows.

Setting the JAVA_HOME variable¶

Open Search and type “advanced system settings” and hit Enter.
Find the Advanced tab and click on the Environment Variables.
In the System variables section click on New if you want to set JAVA_HOME system wide. To set JAVA_HOME for a single user click on New under User variables.
In the opened modal window for Variable name type JAVA_HOME and for the Variable value set the path to the JDK installation. Click OK once you’re done.
Click OK and click Apply to apply the changes.

Setting the PATH variable¶

If you have downloaded and installed the DAML SDK using our Windows installer your PATH variable is already set up.

Mac OS¶

We’ll explain here how to set up JAVA_HOME and PATH variables on Mac OS with zsh shell. If you are using bash all of the instructions are quite similar, except that you will be doing all of the changes in the .bash_profile file.

Setting the JAVA_HOME variable¶

Run the following command in your terminal:

echo 'export JAVA_HOME="$(/usr/libexec/java_home)"' >> ~/.zprofile

In order for the changes to take effect you will need to restart your computer. Note that if you will be setting up the PATH variable as well you can restart your computer after you’re done with all the changes. Upon restarting check that the JAVA_HOME variable is set:

echo $JAVA_HOME

The result should be the path to the JDK installation, something like this:

/Library/Java/JavaVirtualMachines/jdk_version_number/Contents/Home

Setting the PATH variable¶

Run the following command in your terminal:

echo 'export PATH="~/.daml/bin:$PATH"' >> ~/.zprofile

In order for the changes to take effect you will need to restart your computer. Upon restarting check the PATH variable and make sure that the changes have been applied:

echo $PATH

You should see ~/.daml/bin in the output.

Linux¶

We’ll explain here how to set up JAVA_HOME and PATH variables on Linux for bash.

Setting the JAVA_HOME variable¶

Java should be installed typically in a folder like /usr/lib/jvm/java-version. Before running the following command make sure to change the java-version with the actual folder found on your computer:

echo "export JAVA_HOME=/usr/lib/jvm/java-version" >> ~/.bash_profile

In order for the changes to take effect you will need to restart your computer. Note that if you will be setting up the PATH variable as well you can restart your computer after you’re done with all the changes. Upon restarting check that the JAVA_HOME variable is set:

echo $JAVA_HOME

The result should be the path to the JDK installation:

/usr/lib/jvm/java-version

Setting the PATH variable¶

Run the following command:

echo 'export PATH="~/.daml/bin:$PATH"' >> ~/.bash_profile

Save the file before closing.

In order for the changes to take effect you will need to restart your computer. Upon restarting check the PATH variable and make sure that the changes have been applied:

echo $PATH

You should see ~/.daml/bin in the output.