質問編集履歴
2
書式の改善
title
CHANGED
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File without changes
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body
CHANGED
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@@ -10,6 +10,7 @@
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10
10
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import java.util.Scanner;
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11
11
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12
12
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13
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+
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13
14
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public class PostalCode {
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14
15
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15
16
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public static void main(String[] args) {
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@@ -23,19 +24,19 @@
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23
24
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Scanner str = new Scanner(System.in);
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24
25
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int yuubin = str.nextInt();
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25
26
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27
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+
String address = map.get(yuubin);
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28
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+
map.put(yuubin, address);
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29
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+
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26
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-
System.out.println(yuubin+ "に対応する住所は" +
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30
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+
System.out.println(yuubin+ "に対応する住所は" +address+ "です。");
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27
31
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28
32
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} catch (FileNotFoundException e) {
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29
33
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System.out.println("ファイルが見つかりません");
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30
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-
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|
34
|
+
}
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31
35
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}
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32
36
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33
37
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}
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34
38
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|
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35
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-
}
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36
39
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|
|
37
|
-
}
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38
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-
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39
40
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```
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40
41
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実行結果
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41
42
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```
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1
書式の改善
title
CHANGED
|
File without changes
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body
CHANGED
|
@@ -5,6 +5,7 @@
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|
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5
5
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HashMapを使いたいのですがgetではダメなんでしょうか？
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6
6
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```
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7
7
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import java.io.File;
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|
8
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+
import java.io.FileNotFoundException;
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8
9
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import java.util.HashMap;
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9
10
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import java.util.Scanner;
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10
11
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@@ -14,17 +15,27 @@
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14
15
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public static void main(String[] args) {
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15
16
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File fr = new File("postalcode.csv");
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16
17
|
|
|
17
|
-
HashMap<Integer, String> map = new HashMap<Integer, String>();
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18
18
|
|
|
19
|
+
try (Scanner fin = new Scanner(fr)) {
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|
20
|
+
HashMap<Integer, String> map = new HashMap<Integer, String>();
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21
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+
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|
19
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-
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|
22
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+
System.out.print("郵便番号：");
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|
20
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-
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|
23
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+
Scanner str = new Scanner(System.in);
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21
|
-
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|
24
|
+
int yuubin = str.nextInt();
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|
22
|
-
|
|
25
|
+
|
|
23
|
-
|
|
26
|
+
System.out.println(yuubin+ "に対応する住所は" +map.get(yuubin)+ "です。");
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|
27
|
+
|
|
28
|
+
} catch (FileNotFoundException e) {
|
|
29
|
+
System.out.println("ファイルが見つかりません");
|
|
30
|
+
}
|
|
24
31
|
}
|
|
25
32
|
|
|
26
33
|
}
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|
27
34
|
|
|
35
|
+
}
|
|
36
|
+
|
|
37
|
+
}
|
|
38
|
+
|
|
28
39
|
```
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|
29
40
|
実行結果
|
|
30
41
|
```
|