質問編集履歴
2
バージョン変更の改善 画像追記
test
CHANGED
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File without changes
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test
CHANGED
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@@ -127,3 +127,17 @@
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127
127
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128
128
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129
129
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}
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130
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+
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131
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132
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133
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134
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135
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+
みなさんの改善提案に沿ってググって実行してみたのですが、バージョンを7にして適用を押しました。するとエラーが消えないのですが他に作業が必要なのでしょうか？
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136
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+
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137
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+
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138
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+
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139
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+
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140
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+
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141
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+
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142
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+
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143
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+
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1
テキストコードを追加
test
CHANGED
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File without changes
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test
CHANGED
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@@ -19,3 +19,111 @@
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19
19
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20
20
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21
21
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22
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+
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23
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+
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24
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+
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25
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26
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+
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27
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+
＜テキストコード＞
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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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+
package chapter08;
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32
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+
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33
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+
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34
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+
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35
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+
import java.io.BufferedReader;
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36
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+
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37
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+
import java.io.File;
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38
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+
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|
39
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+
import java.io.FileNotFoundException;
|
|
40
|
+
|
|
41
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+
import java.io.FileReader;
|
|
42
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+
|
|
43
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+
import java.io.IOException;
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|
44
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+
|
|
45
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+
|
|
46
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+
|
|
47
|
+
public class Main3 {
|
|
48
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+
|
|
49
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+
private static final String LINE_SEPARATOR = System.lineSeparator();
|
|
50
|
+
|
|
51
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+
|
|
52
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+
|
|
53
|
+
public static void main(String[] args) {
|
|
54
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+
|
|
55
|
+
System.out.println(readFromFile("src/capter08/Main3.java"));
|
|
56
|
+
|
|
57
|
+
}
|
|
58
|
+
|
|
59
|
+
|
|
60
|
+
|
|
61
|
+
public static String readFromFile(String fileName) {
|
|
62
|
+
|
|
63
|
+
File file = new File(fileName);
|
|
64
|
+
|
|
65
|
+
StringBuilder sb = new StringBuilder();
|
|
66
|
+
|
|
67
|
+
|
|
68
|
+
|
|
69
|
+
FileReader fr = null;
|
|
70
|
+
|
|
71
|
+
BufferedReader br = null;
|
|
72
|
+
|
|
73
|
+
try {
|
|
74
|
+
|
|
75
|
+
fr = new FileReader(file);
|
|
76
|
+
|
|
77
|
+
br = new BufferedReader(fr);
|
|
78
|
+
|
|
79
|
+
String line;
|
|
80
|
+
|
|
81
|
+
while ((line = br.readLine()) != null) {
|
|
82
|
+
|
|
83
|
+
sb.append(line).append(LINE_SEPARATOR);
|
|
84
|
+
|
|
85
|
+
}
|
|
86
|
+
|
|
87
|
+
return sb.toString();
|
|
88
|
+
|
|
89
|
+
} catch (FileNotFoundException e) {
|
|
90
|
+
|
|
91
|
+
System.err.println(String.format("ファイルが見つかりません: %s", fileName));
|
|
92
|
+
|
|
93
|
+
return null;
|
|
94
|
+
|
|
95
|
+
} catch (IOException e) {
|
|
96
|
+
|
|
97
|
+
System.err.println(String.format("ファイル読み込みに失敗しました: %s", fileName));
|
|
98
|
+
|
|
99
|
+
return null;
|
|
100
|
+
|
|
101
|
+
} finally {
|
|
102
|
+
|
|
103
|
+
closeSilently(br);
|
|
104
|
+
|
|
105
|
+
closeSilently(fr);
|
|
106
|
+
|
|
107
|
+
}
|
|
108
|
+
|
|
109
|
+
}
|
|
110
|
+
|
|
111
|
+
|
|
112
|
+
|
|
113
|
+
private static void closeSilently(AutoCloseable target) {
|
|
114
|
+
|
|
115
|
+
if (target != null) {
|
|
116
|
+
|
|
117
|
+
try {
|
|
118
|
+
|
|
119
|
+
target.close();
|
|
120
|
+
|
|
121
|
+
} catch (Exception e) {}
|
|
122
|
+
|
|
123
|
+
}
|
|
124
|
+
|
|
125
|
+
}
|
|
126
|
+
|
|
127
|
+
|
|
128
|
+
|
|
129
|
+
}
|