import java.io.StringWriter;

import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;

public class ExpressionInVTLExample {
    public static void main(String args[]){
        VelocityEngine ve = new VelocityEngine();
        ve.init();
         
        Template t = ve.getTemplate("velocitytemplate.vm");
         
        VelocityContext vc = new VelocityContext();
        vc.put("a", 30);
        vc.put("b", 20);
        
        StringWriter sw = new StringWriter();
        t.merge(vc, sw);
         
        System.out.println(sw);
    }
}