i have a jtext feild which the user have to insert a number in it , i applied a try and catch block to catch the exception when the user don't enter any thing, but the program continue..what i need is to stop until the user insert a number.
try{
if(!num.getText().equals(null)){
i=Integer.parseInt(num.getText());
}else{i=0;
}}catch(Exception e){
JOptionPane.showMessageDialog(null,"Insert the maximun number");
}
> i have a jtext feild which the user have to insert a
> number in it , i applied a try and catch block to
> catch the exception when the user don't enter any
> thing, but the program continue..what i need is to
> stop until the user insert a number.
>
> try{
>if(!num.getText().equals(null)){
> i=Integer.parseInt(num.getText());
>
> }else{i=0;
>
> }}catch(Exception e){
> JOptionPane.showMessageDialog(null,"Insert the
> he maximun number");
>
> }
i don't have much idea about Swing but does JTextField through an exception if user does not enter anything
if not then u need to manually throw an exception and then catch if this is the case then subclass the Exception class and create ur own Exception .
The problem seems to be in the code that surrounds or calls the try/catch you posted. Iif you detect that a textfield does not contain a "legal" value, you should possibly notify the user and the caller should abort doing whatever it was that it was trying to do with the field's value. Having a "default value" seems to be getting in the way here.
