finally
現在,修改上一個練習中的 SplitTheBill 計算器,改用 finally 在每個人應付金額的計算結果上進行列印,即使捕捉到 Exception 也要輸出。
本練習屬於課程
Java 的資料型別與例外狀況
練習說明
- 加上
try,並開始try的程式碼區塊。 - 完成
catch的程式碼區塊,並加入finally程式碼區塊。 - 完成
finally程式碼區塊。
動手互動練習
試著完成這個範例程式碼,體驗一下這個練習。
class SplitTheBill {
public static void main(String[] args) {
BigDecimal bill = new BigDecimal(125.50);
computeEachBill(bill, 5);
computeEachBill(bill, 0);
}
public static void computeEachBill(BigDecimal bill, int people) {
BigDecimal individualBill = new BigDecimal(0);
BigDecimal numPeople = new BigDecimal(people);
// Add a try and the beginning of the try code block
____ ____
individualBill = bill.divide(numPeople);
} catch (ArithmeticException e) {
System.out.println("You didn't provide a positive number of people to split the bill among. Assuming 2 people.");
numPeople = new BigDecimal(2);
individualBill = bill.divide(numPeople);
// End the catch code block and add a finally block
____ ____ ____
System.out.println("Bill for each of " + numPeople + " persons is: " + individualBill);
// End the finally block
____
}
}