Java Read data from MariaDB (JDBC)

Statement s = connect.createStatement();

String CusID = "C002";

String sql = "SELECT * FROM  customer WHERE CustomerID = '" + CusID + "' ";

ResultSet rec = s.executeQuery(sql);

while((rec!=null) && (rec.next()))
{
	System.out.print(rec.getString("CustomerID"));
}

package com.java.myapp;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;

public class MyClass {

	public static void main(String[] args) {
		
		Connection connect = null;
		Statement s = null;
		
		try {
			Class.forName("org.mariadb.jdbc.Driver");
			connect =  DriverManager.getConnection("jdbc:mariadb://localhost/mydatabase" +
					"?user=root&password=root");
			
			s = connect.createStatement();
			
			String CusID = "C002";
			
			String sql = "SELECT * FROM  customer WHERE CustomerID = '" + CusID + "' ";
			
			ResultSet rec = s.executeQuery(sql);
			
			while((rec!=null) && (rec.next()))
            {
                System.out.print(rec.getString("CustomerID"));
                System.out.print(" - ");
                System.out.print(rec.getString("Name"));
                System.out.print(" - ");
                System.out.print(rec.getString("Email"));
                System.out.print(" - ");
                System.out.print(rec.getString("CountryCode"));
                System.out.print(" - ");
                System.out.print(rec.getFloat("Budget"));
                System.out.print(" - ");
                System.out.print(rec.getFloat("Used"));
                System.out.println("");
            }
             
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		// Close
		try {
			if(connect != null){
				s.close();
				connect.close();
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
}