In order to run correctly, the Sample TCK tests require classes contained in the following two JAR archives:
lib\sampleTCK.jar
jck_install_dir\jre\lib\rt.jar

Click Add to activate a file chooser with which you choose these two archives. As you make selections they are added to the list. After you have added selections, you can modify the list as follows:
Delete
Selections
Select an item in the list and click Remove
Move
Selections
Select an item in the list and click Move Up or Move Down