You can include the -v option to echo results of your edit.
-v
Example: java -cp [jt_dir /lib/] javatest.jar com.sun.javatest.EditJTI -n -v -o mynewl.jti -l myeditlog.html "|/java/jdk/1.3/|/java/jck/1.4/|" myoriginal.jti
java -cp
/lib/
javatest.jar com.sun.javatest.EditJTI -n -v -o
.jti -l
.html "|/java/jdk/1.3/|/java/jck/1.4/|"
.jti