更好地處理數字格式異常在android

Question

我有下面的代碼片段，我想重構到一個更抽象的應用程序異常處理程序，但我想確保我已經把它儘可能整潔首先

，關於如何提高這個代碼或使其更可重用

int id = -1; 
final StringBuilder errorMessage = new StringBuilder("Bad Input Value: "); 
try { 
     id = Integer.parseInt(edtId.getText().toString()); 
} catch (final NumberFormatException e) { 
     errorMessage.append("Failed to parse id " + e.getMessage()); 
} 

if (id < 0) { 
    errorToast(errorMessage.toString()); 
} else { 
    //go ahead an retreive values from database knowing the id has been parsed 
    //correctly to a positive int. 
} 

Answer 1

爲什麼預分配ID的幻數有什麼建議？

try { 
    int id=Integer.parseInt(edtId.getText().toString()); 
    //go on as normal 
} catch (NumberFormatException e) { 
    //handle error 
}