Java JDBC retrieve selected value

import java.sql.*;
class Get 
{
    public static void main(String[] args) throws Exception
    {
        Class.forName("com.mysql.jdbc.Driver");
           Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
           Statement st=con.createStatement();
           ResultSet rs=st.executeQuery("Select Max(id) from items");
            int id=0;
               if(rs.next()){
                    id=rs.getInt("Max(id)");

               }
               System.out.println(id);
               ResultSet rs1=st.executeQuery("Select * from items where id="+id+"");
                   while(rs1.next()){
                       System.out.println(rs1.getString(1)+" "+rs1.getString(2)+" "+rs1.getString(3)+" "+rs1.getString(4));
                   }
    }
}