import java.sql.*;

public class JDBC{
    Connection con;
    String s1;
    String s2;
    String s3;
    String st="";

    public static void main(String[] args){
        JDBC j1 = new JDBC();

    }
    public String getR(){
        return st;
    }

    public JDBC(){
        try {
        Class.forName("com.mysql.jdbc.Driver");
        con = DriverManager.getConnection("jdbc:mysql://localhost:3306/activity","root","");
        Statement stmt = con.createStatement();
        ResultSet rst = stmt.executeQuery("SELECT * FROM sample");

        while (rst.next()){
            s1 = rst.getString(1);
            s2 = rst.getString(2);
            s3 = rst.getString(3);
            st += s1+s2+s3;

                System.out.println(s1 + " " + s2 + " " + s3);
            }
        }
        catch(Exception e){
			System.out.println(e);

}
            /*finally{
                try{
                    con.close();
                }
                catch (Exception e){
                }
            }*/

    }
}