= doc.FAQ.WhatDoINeedToEstablishASingle-TierJDBCConnection %TOC% *You need to install one of Sun's Java Runtime Environments (JRE) on the machine that contains your client application. *You need to install one of [[OpenLink]] 's .jar files on the machine that contains your JAVA client application. (The JAVA version of the .jar should match the JAVA version of the JRE.) *You need to ensure that a functional database native client is installed on the machine that contains the application and the Single-Tier .jar. ----