回答編集履歴
2
第1引数変化
test
CHANGED
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@@ -29,3 +29,47 @@
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29
29
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}
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30
30
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31
31
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```
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32
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+
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33
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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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34
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+
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35
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+
```java
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36
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+
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37
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+
import java.math.BigDecimal;
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38
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+
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39
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+
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40
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+
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41
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/* Name of the class has to be "Main" only if the class is public. */
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42
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+
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43
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class Ideone {
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44
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45
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public static void main (String[] args) {
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46
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+
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47
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BigDecimal decimal = BigDecimal.valueOf(15743.8924151);
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48
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49
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for (int i = -3; i <= 3; i++) {
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50
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51
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System.out.println(String.format("i = %2d: ",i) +
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52
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53
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decimal.setScale(i, java.math.RoundingMode.FLOOR).doubleValue());
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54
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+
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55
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}
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56
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+
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57
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}
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58
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+
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59
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}
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60
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61
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```
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62
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+
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63
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i = -3: 15000.0
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64
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+
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65
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i = -2: 15700.0
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66
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+
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67
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i = -1: 15740.0
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68
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69
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i = 0: 15743.0
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70
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+
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71
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i = 1: 15743.8
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72
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73
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i = 2: 15743.89
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74
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75
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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
test
CHANGED
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@@ -9,8 +9,6 @@
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9
9
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10
10
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11
11
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```java
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12
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-
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13
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-
import java.math.BigInteger;
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14
12
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15
13
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import java.math.BigDecimal;
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16
14
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