Testing double for lack of input

[Centorpe]

Can anyone tell me what is wrong with this?
App crashes if user input is left blank. I was hoping it would display toast and wait for input.

                EditText userWireInput = (EditText) findViewById(R.id.WireSizeInputET);
                String userWireData = userWireInput.getText().toString();
               double userWire = Double.parseDouble(userWireData);

                if (userWire == 0) {

                    Toast.makeText(ISOM_Int_Results.this, "ENTER WIRE SIZE", Toast.LENGTH_LONG).show();
                    return;
            }

[hericles]

If it crashes the app, break point it and debug line by line. Knowing exactly which line causes the crash usually makes solving it quite easy.

[peter_budo]

@Centorpe you should have posted also error message...

[rproffitt]

Just an idea. If you want to set this to zero on blank, either test the string for blank and set it to "0" or try catch around the code and handle it as you wish. More about it at https://www.google.com/#q=try+catch+java+android+example