#!/bin/bash
s='<h1>JVM</h1><p>Free Memory:2144.78 MB Total Memory:3072.00 MB Max Memory:3072.00 MB</p><table border="0">'
fm=$(sed -n 's/.*Free Memory:\([^ ]*\).*/\1/p' <<< "$s")
tm=$(sed -n 's/.*Total Memory:\([^ ]*\).*/\1/p' <<< "$s")
mm=$(sed -n 's/.*Max Memory:\([^ ]*\).*/\1/p' <<< "$s")
echo "fm=$fm, tm=$tm, mm=$mm"