Terminal needs to be reopened

week1/00-tools-setup.md

@@ -40,6 +40,8 @@ echo 'export JAVA_HOME="$(/usr/libexec/java_home -v 1.8)"' >> ~/.bash_profile
 echo 'export PATH="$JAVA_HOME/bin:$PATH"' >> ~/.bash_profile
 ```
 
+At this point, make sure to close the terminal and open a new one.
+
 ### On Windows
 
 [Download and run the OpenJDK 8 installer.](https://adoptopenjdk.net)