回答編集履歴
2
第1引数変化
answer
CHANGED
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@@ -13,4 +13,26 @@
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13
13
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System.out.println(dec2.doubleValue()); // 15700.0
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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
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-
```
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16
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+
```
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17
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+
setScaleの第1引数を変化させるとこうなる
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18
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+
```java
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19
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+
import java.math.BigDecimal;
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20
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+
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21
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/* Name of the class has to be "Main" only if the class is public. */
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22
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class Ideone {
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23
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public static void main (String[] args) {
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24
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BigDecimal decimal = BigDecimal.valueOf(15743.8924151);
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25
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for (int i = -3; i <= 3; i++) {
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26
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System.out.println(String.format("i = %2d: ",i) +
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27
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decimal.setScale(i, java.math.RoundingMode.FLOOR).doubleValue());
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28
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}
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29
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}
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30
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}
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31
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+
```
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32
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i = -3: 15000.0
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33
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i = -2: 15700.0
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34
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i = -1: 15740.0
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35
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i = 0: 15743.0
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36
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i = 1: 15743.8
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37
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i = 2: 15743.89
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38
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i = 3: 15743.892
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1
使わないBigIntegerが残ったままだった
answer
CHANGED
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@@ -4,7 +4,6 @@
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4
4
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0. 必要に応じてBigDecimalからdoubleなどに変換
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5
5
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6
6
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```java
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7
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-
import java.math.BigInteger;
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8
7
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import java.math.BigDecimal;
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9
8
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10
9
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class Ideone {
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