# how to run your first classifier in weka

Click the “Choose” button in the “Classifier” section and click on “trees” and click on the “J48” algorithm. This is an implementation of the C4.8 algorithm in Java (“J” for Java, 48 for C4.8, hence the J48 name) and is a minor extension to the famous C4.5 algorithm. You can read more about the C4.5 algorithm here