Plz help in exception handling

Question

Hello
I am trying to do this exception handling in string to numeric conversion. Everything is working fine except when i enter any number with letters f and d on exception handling doesnt work like for example if i enter 5f or 4 d progam is working fine, but it supposed to show that it is error.
here is the code:
class AlsMark implements ActionListener
        public void actionPerformed(ActionEvent ae)
           try {
            double amount=0;
            amount=Double.parseDouble(tfConvert.getText());
            amount=amount*0.168;
            lbResult.setText(tfConvert.getText()+" mark is "+Double.toString(amount)+" euro");
            validate();
            catch (NumberFormatException nfe)
                System.out.println(tfConvert.getText()+" is not an integer");
               // tfConvert.setText("0");
                JOptionPane.showMessageDialog(null,"Please enter a decimal value","Error",JOptionPane.ERROR_MESSAGE);
    }

Answer 1

The Double.parseDouble() method will accept f (float) and d (double) letters.
Try with:
class AlsMark implements ActionListener
        public void actionPerformed(ActionEvent ae)
           try {
            double amount=0;
            amount=(double)Integer.parseInt(tfConvert.getText());
            amount=amount*0.168;
            lbResult.setText(tfConvert.getText()+" mark is "+Double.toString(amount)+" euro");
            validate();
            catch (NumberFormatException nfe)
                System.out.println(tfConvert.getText()+" is not an integer");
               // tfConvert.setText("0");
                JOptionPane.showMessageDialog(null,"Please enter a decimal value","Error",JOptionPane.ERROR_MESSAGE);