The first thing we need to do in part three is begin GWT's Remote Procedural Call (RPC) plumbing. We use the RPC calls to fire off Asynchronous events so that we can get data from our database. The calls go to the server effectively. Firstly I have made a package called com.company.client.rpc and this is where we'll make our RPC interfaces.
Firstly make a interface called TeacherService as listed below.
package com.company.client.rpc;
import java.util.List;
import com.google.gwt.us...
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