try {
z1 = Double.parseDouble(tZahl.getText().toString());
}
catch (NumberFormatException e) {
tOutput.setText("Fehlerhafte Zahl");
return;
}
private Double getNumber(EditText edText) {
try {
String s= edText.getText().toString();
double zahl = Double.parseDouble(s);
return new Double(zahl);
} catch (NumberFormatException e) {
return Double.NaN;
}
}
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