回答編集履歴
4
Calendarのまま判定する方法
answer
CHANGED
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@@ -66,4 +66,29 @@
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66
66
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67
67
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return diff1 >= 0 && diff2 >= 0;
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68
68
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}
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69
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-
```
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69
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+
```
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70
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+
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71
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+
今更追加(17/09/17)。
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72
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+
- 日付比較するメソッドを作る
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73
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+
```java
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74
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public boolean getFlg() throws ParseException {
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75
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+
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76
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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77
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Date startDate = sdf.parse("2007-01-01");
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78
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Date endDate = sdf.parse("2017-05-26");
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79
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+
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80
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Calendar from = Calendar.getInstance(),
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81
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today = Calendar.getInstance(),
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82
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to = Calendar.getInstance();
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83
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from.setTime(startDate);
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84
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to.setTime(endDate);
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85
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+
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86
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return compareByDate(from, today) <= 0 && compareByDate(today, to) <= 0;
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87
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}
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88
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+
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89
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public static int compareByDate(Calendar c1, Calendar c2) {
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90
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int i = Integer.compare(c1.get(Calendar.YEAR), c2.get(Calendar.YEAR));
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91
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if (i != 0) return i;
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92
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return Integer.compare(c1.get(Calendar.DAY_OF_YEAR), c2.get(Calendar.DAY_OF_YEAR));
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93
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}
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94
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+
```
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3
修正
answer
CHANGED
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@@ -18,7 +18,7 @@
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18
18
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int diff1 = today.compareTo(from);
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19
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int diff2 = to.compareTo(today);
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20
20
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21
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-
return diff1 >= 0 && diff2 >
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21
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+
return diff1 >= 0 && diff2 > 0;
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22
22
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}
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23
23
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```
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24
24
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@@ -31,7 +31,7 @@
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31
31
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long endDate = sdf.parse("2017-05-26").getTime() + 24L * 60L * 60L * 1000L;
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32
32
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long now = new Date().getTime();
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33
33
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34
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-
return startDate <= now && now <
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34
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+
return startDate <= now && now < endDate;
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35
35
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}
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36
36
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```
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37
37
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2
現在時刻関係のDateの処理が意味なかったので削除
answer
CHANGED
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@@ -7,13 +7,11 @@
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7
7
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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8
8
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Date startDate = sdf.parse("2007-01-01");
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9
9
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Date endDate = sdf.parse("2017-05-26");
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10
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-
Date now = new Date();
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11
10
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12
11
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Calendar from = Calendar.getInstance(),
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13
12
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today = Calendar.getInstance(),
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14
13
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to = Calendar.getInstance();
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15
14
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from.setTime(startDate);
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16
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-
today.setTime(now);
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17
15
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to.setTime(endDate);
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18
16
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to.add(Calendar.DATE, 1); //終了日時を翌日に
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19
17
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1
不要な例外宣言を削除、方法をもう一つ追加\(long値比較\)
answer
CHANGED
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@@ -23,10 +23,25 @@
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23
23
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return diff1 >= 0 && diff2 >= 0;
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24
24
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}
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25
25
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```
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26
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+
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27
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+
- getTime()で得られるlong値で比較。その際に終了日時のほうに1日相当のミリ秒を加算する
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28
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+
```java
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29
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+
public boolean getFlg() throws ParseException {
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30
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+
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31
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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32
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long startDate = sdf.parse("2007-01-01").getTime();
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33
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long endDate = sdf.parse("2017-05-26").getTime() + 24L * 60L * 60L * 1000L;
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34
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long now = new Date().getTime();
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35
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+
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36
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return startDate <= now && now <= endDate;
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37
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}
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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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26
41
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- 逆転の発想。文字列に変換して比較する
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27
42
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日付の後先と文字列化した日付の後先は一致する
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28
43
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```java
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29
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-
public boolean getFlg()
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44
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+
public boolean getFlg() {
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30
45
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31
46
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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32
47
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String startDate = "2007-01-01";
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@@ -42,7 +57,7 @@
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42
57
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43
58
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- [LocalDate](https://docs.oracle.com/javase/jp/8/docs/api/java/time/LocalDate.html)を使用(Java8以降限定)
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44
59
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```java
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45
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-
public boolean getFlg()
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60
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+
public boolean getFlg() {
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46
61
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47
62
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LocalDate startDate = LocalDate.parse("2007-01-01");
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48
63
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LocalDate endDate = LocalDate.parse("2017-05-26");
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