can anyone guide me or teach me how can i call the java method into the jsp file? do i need a main method to call it in? or just call the method that i need 2 use only??

below is the coding that i did. one is java and another one is jsp. hope that someone can help me on it. Thanks!!!! Really appreciate it.

Country Method.java
Code:
package Test;

import java.io.File;

import com.db4o.*;
import com.db4o.ObjectContainer;
import com.db4o.ObjectSet;

public class countryMethod {
	
	public final static String filename = "C:\\TestStore.yap"; 
	public String record;
	public int value;
	public String cName1;
	private static ObjectContainer db = Db4o.openFile(filename);
		
	public static void storeData() {
		//Delete existing data file
		new File(filename).delete();
		
		//Open Database
		db = Db4o.openFile(filename);
		
		//Add value into database
		Country c1 = new Country(100, "Malaysia");
		Country c2 = new Country(200, "Thailand");
		Country c3 = new Country(300, "Sing");
		Country c4 = new Country(400, "Japan");
		Country c5 = new Country(500, "Indian");
				
		db.set(c1);
		db.set(c2);
		db.set(c3);
		db.set(c4);
		db.set(c5);
		System.out.println("abc");
	}
	
	public String getData() {
		String str = "";
		try {
			
			//open database
			ObjectContainer db = Db4o.openFile(filename);
		
			//Create empty object
			Country country = new Country(0,null);
			
			//Object dataset
			ObjectSet result = db.get(country);
		
			//System.out.println(result.size());
	
			while(result.hasNext()){
						
				Country a = (Country)result.next();
				record = a.getName();
				
				value = a.getValue();
				str = str +" | "+ value;
				
				//System.out.println(str);
				//System.out.println(a.getValue());
				
			}
		}catch(Exception s){
			s.printStackTrace();
		}
		str = str +" | "+ record;
		return str;
	}
	
	/*public int getValue(){
		return value;
	}*/
}

and the jsp.
WebApplication.jsp
Code:
<%@page import com.db4o.ObjectContainer%>
<html>
<head><title>Testing page</titile></head>

<body>
<jsp:useBean id="link" class = "Test.countryMethod" />
<%=link.getData() %>

</body>
</html>