cronjob problems

Java is located in /usr/bin/java and the StringTest.java and StringTest.class files are in the /home/varun/ directory .

    command ( Terminal ) -- /usr/bin/java StringTest
    output --- alphabetaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

command -- crontab -e
output ---
SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/varun/
16 * * * * rsync -r -n -t -v --progress --delete -b /home/varun/auth/ /home/varun/autho/ # JOB_ID_10
*/1 * * * * logger "testing cron" # JOB_ID_11
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command -- sudo crontab -e
output ----
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/varun/
* * * * * logger "this is a new job"
* * * * * /usr/bin/java StringTest # JOB_ID_4
---------

command -- tail -f /var/log/messages
output --
May 22 16:53:01 varun-laptop logger: testing cron
May 22 16:53:01 varun-laptop logger: this is a new job
May 22 16:54:01 varun-laptop logger: testing cron
May 22 16:54:01 varun-laptop logger: this is a new job
May 22 16:55:01 varun-laptop logger: this is a new job
May 22 16:55:01 varun-laptop logger: testing cron
May 22 16:56:01 varun-laptop logger: this is a new job
May 22 16:56:01 varun-laptop logger: testing cron
May 22 16:57:01 varun-laptop logger: this is a new job
May 22 16:57:01 varun-laptop logger: testing cron
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So the crontab is working but not generating the result as wanted