Pin Code Validation command?

Question

i am trying to run another query after pin is confirmed.

The First "TRY" will run query to card db table that only contains card number and pin code. the second "TRY" will run query from another table with other information. i want second "TRY" to run only if the pinn and pindb are matched.

if(e.getSource()==okbutton){
        promptfr.setVisible(false);

        String card=cardnumber.getText();
        String pinn=pincode.getText();
        String pindb=null;
        String pinsql="SELECT *  FROM `card` WHERE `card_number`="+card+";";
        try{
            Class.forName(jdbc_driver);
            con=DriverManager.getConnection(db_url, "root", "");
            ps=con.prepareStatement(pinsql);
            rs=ps.executeQuery();
            if(rs.next());{
                pindb=rs.getString("code")+"";
                System.out.println(pinn+" "+pindb);

            }}
            catch(Exception g){
                System.out.println("Not Found!");
                g.printStackTrace();
            }


        String sql="SELECT *  FROM `user` WHERE `card_number`="+card+";";
        try{

            Class.forName(jdbc_driver);
            con1=DriverManager.getConnection(db_url, "root", "");
            ps1=con1.prepareStatement(sql);
            rs1=ps1.executeQuery();
            if(rs1.next());{
                surname = rs1.getString("ovog")+"";
                name  =rs1.getString("ner")+"";
                id = Integer.parseInt(rs1.getString("id")+"");
                cardnum = Long.parseLong(rs1.getString("card_number")+"");
                balance = Integer.parseInt(rs1.getString("dvn")+"");
                System.out.println("ID:"+id+"\nName:"+name+"\nSurname:"+surname+"\nCard Number:"+cardnum+"\nBalance:"+balance);
                information.setText("ID:"+id+"\nName:"+name+"\nSurname:"+surname+"\nCard Number:"+cardnum+"\nBalance:"+balance);
                }

            }

            catch(Exception g){
                System.out.println("Not Found!");
                g.printStackTrace();
            }}

Answer 1

if(pindb.equals(pinn)){
//run 2nd query
}

Answer 2

Simply have an boolean variable . Store the result of first query in the variable .

 if(value==true){
// Run the 2nd query     
}

Hope this helps!