回答編集履歴
3
引数名変更
test
CHANGED
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@@ -20,8 +20,8 @@
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20
20
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Amount(int value) {
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21
21
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this.value = value;
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22
22
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}
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23
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-
Amount add(Amount a
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23
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+
Amount add(Amount augend) {
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24
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-
return new Amount(value + a
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24
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+
return new Amount(value + augend.value);
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25
25
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}
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26
26
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Amount addTax() {
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27
27
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return new Amount((int)(value * 1.08));
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2
final 付け
test
CHANGED
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@@ -14,8 +14,8 @@
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14
14
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}
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15
15
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}
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16
16
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17
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-
class Amount {
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17
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+
final class Amount {
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18
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-
private int value;
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18
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+
private final int value;
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19
19
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20
20
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Amount(int value) {
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21
21
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this.value = value;
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1
修正
test
CHANGED
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@@ -1,4 +1,4 @@
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1
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-
Amount を「不変
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1
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+
Amount を「不変」(一度作ったら値が変わらないモノ)とすると思います。
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2
2
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```java
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3
3
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public class StationaryShop {
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4
4
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public static void main(String[] args) {
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