Check application running in Linux

#!/bin/bash

PID1=`ps -eaf | grep app1.jar |grep -v  grep |wc -l`
if [ $PID1 -eq 0 ]
        then
        cd /apps/app1/
        java -jar -Xms32m -Xmx64m app1.jar &
        echo "app1.jar ....................................... Started"
        sleep 1
        else
        echo "app1.jar      ..................................... Already Running"
fi

Above script can be used to check application status. If "app1.jar" is running, it will be printed "Already Running" else, it will start the "app1.jar".