How to Use java.util.Properties to pass in properties in java

import java.io.StringWriter;
import java.io.Writer;
import java.util.Properties;

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

public class HelloWorldProperties {

public static void main(String[] args) throws Exception {
Properties props = new Properties();
props.put("input.encoding", "utf-8");

Velocity.init(props);

Template template = Velocity.getTemplate("./src/HelloWorld.vm");

VelocityContext context = new VelocityContext();

Writer writer = new StringWriter();
template.merge(context, writer);

System.out.println(writer.toString());
}
}
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//File: HelloWorld.vm
Hello World!