質問編集履歴
3
誤字の修正
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -234,7 +234,7 @@
|
|
|
234
234
|
|
|
235
235
|
|
|
236
236
|
|
|
237
|
-
この点に関して
|
|
237
|
+
この点に関して実際に試してみました。
|
|
238
238
|
|
|
239
239
|
|
|
240
240
|
|
2
Java7とjava8での実行結果の違いを追加
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -227,3 +227,141 @@
|
|
|
227
227
|
}
|
|
228
228
|
|
|
229
229
|
```
|
|
230
|
+
|
|
231
|
+
### 追記
|
|
232
|
+
|
|
233
|
+
>java8ではString#split()のその点が改善されているようですがjava7でお願いします。
|
|
234
|
+
|
|
235
|
+
|
|
236
|
+
|
|
237
|
+
この点に関して上記の実際に試してみました。
|
|
238
|
+
|
|
239
|
+
|
|
240
|
+
|
|
241
|
+
【実行コード】
|
|
242
|
+
|
|
243
|
+
``` java
|
|
244
|
+
|
|
245
|
+
import java.util.Arrays;
|
|
246
|
+
|
|
247
|
+
|
|
248
|
+
|
|
249
|
+
public class Test {
|
|
250
|
+
|
|
251
|
+
|
|
252
|
+
|
|
253
|
+
public static void main(String[] args) {
|
|
254
|
+
|
|
255
|
+
|
|
256
|
+
|
|
257
|
+
String regex = "(?=◆)";
|
|
258
|
+
|
|
259
|
+
|
|
260
|
+
|
|
261
|
+
String str1 = "◆ABCD123";
|
|
262
|
+
|
|
263
|
+
String str2 = "◆ABCD123◆ABCD123";
|
|
264
|
+
|
|
265
|
+
String str3 = "◆ABCD123◆ABCD123◆";
|
|
266
|
+
|
|
267
|
+
String str4 = "ABCD123";
|
|
268
|
+
|
|
269
|
+
String str5 = "";
|
|
270
|
+
|
|
271
|
+
String str6 = "ABCD123◆ABCD123";
|
|
272
|
+
|
|
273
|
+
|
|
274
|
+
|
|
275
|
+
String[] ary1 = str1.split(regex);
|
|
276
|
+
|
|
277
|
+
String[] ary2 = str2.split(regex);
|
|
278
|
+
|
|
279
|
+
String[] ary3 = str3.split(regex);
|
|
280
|
+
|
|
281
|
+
String[] ary4 = str4.split(regex);
|
|
282
|
+
|
|
283
|
+
String[] ary5 = str5.split(regex);
|
|
284
|
+
|
|
285
|
+
String[] ary6 = str6.split(regex);
|
|
286
|
+
|
|
287
|
+
|
|
288
|
+
|
|
289
|
+
// Javaのバージョンを出力
|
|
290
|
+
|
|
291
|
+
System.out.println("java.version : " + System.getProperty("java.version"));
|
|
292
|
+
|
|
293
|
+
System.out.println("java.vm.version : " + System.getProperty("java.vm.version"));
|
|
294
|
+
|
|
295
|
+
System.out.println();
|
|
296
|
+
|
|
297
|
+
|
|
298
|
+
|
|
299
|
+
System.out.println(Arrays.toString(ary1));
|
|
300
|
+
|
|
301
|
+
System.out.println(Arrays.toString(ary2));
|
|
302
|
+
|
|
303
|
+
System.out.println(Arrays.toString(ary3));
|
|
304
|
+
|
|
305
|
+
System.out.println(Arrays.toString(ary4));
|
|
306
|
+
|
|
307
|
+
System.out.println(Arrays.toString(ary5));
|
|
308
|
+
|
|
309
|
+
System.out.println(Arrays.toString(ary6));
|
|
310
|
+
|
|
311
|
+
}
|
|
312
|
+
|
|
313
|
+
}
|
|
314
|
+
|
|
315
|
+
```
|
|
316
|
+
|
|
317
|
+
|
|
318
|
+
|
|
319
|
+
### 実行結果
|
|
320
|
+
|
|
321
|
+
【Java7】
|
|
322
|
+
|
|
323
|
+
```
|
|
324
|
+
|
|
325
|
+
java.version : 1.7.0_80
|
|
326
|
+
|
|
327
|
+
java.vm.version : 24.80-b11
|
|
328
|
+
|
|
329
|
+
|
|
330
|
+
|
|
331
|
+
[◆ABCD123]
|
|
332
|
+
|
|
333
|
+
[, ◆ABCD123, ◆ABCD123]
|
|
334
|
+
|
|
335
|
+
[, ◆ABCD123, ◆ABCD123, ◆]
|
|
336
|
+
|
|
337
|
+
[ABCD123]
|
|
338
|
+
|
|
339
|
+
[]
|
|
340
|
+
|
|
341
|
+
[ABCD123, ◆ABCD123]
|
|
342
|
+
|
|
343
|
+
```
|
|
344
|
+
|
|
345
|
+
【Java8】
|
|
346
|
+
|
|
347
|
+
```
|
|
348
|
+
|
|
349
|
+
java.version : 1.8.0_71
|
|
350
|
+
|
|
351
|
+
java.vm.version : 25.71-b15
|
|
352
|
+
|
|
353
|
+
|
|
354
|
+
|
|
355
|
+
[◆ABCD123]
|
|
356
|
+
|
|
357
|
+
[◆ABCD123, ◆ABCD123]
|
|
358
|
+
|
|
359
|
+
[◆ABCD123, ◆ABCD123, ◆]
|
|
360
|
+
|
|
361
|
+
[ABCD123]
|
|
362
|
+
|
|
363
|
+
[]
|
|
364
|
+
|
|
365
|
+
[ABCD123, ◆ABCD123]
|
|
366
|
+
|
|
367
|
+
```
|
1
上記で書いた横に詰める解決案の追加
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -131,3 +131,99 @@
|
|
|
131
131
|
|
|
132
132
|
|
|
133
133
|
```
|
|
134
|
+
|
|
135
|
+
|
|
136
|
+
|
|
137
|
+
### 上記で書いた横に詰める解決案
|
|
138
|
+
|
|
139
|
+
```java
|
|
140
|
+
|
|
141
|
+
import java.util.ArrayList;
|
|
142
|
+
|
|
143
|
+
import java.util.Arrays;
|
|
144
|
+
|
|
145
|
+
import java.util.List;
|
|
146
|
+
|
|
147
|
+
|
|
148
|
+
|
|
149
|
+
public class Test2 {
|
|
150
|
+
|
|
151
|
+
|
|
152
|
+
|
|
153
|
+
public static void main(String[] args) {
|
|
154
|
+
|
|
155
|
+
|
|
156
|
+
|
|
157
|
+
String regex = "(?=◆)";
|
|
158
|
+
|
|
159
|
+
|
|
160
|
+
|
|
161
|
+
String str1 = "◆ABCD123";
|
|
162
|
+
|
|
163
|
+
String str2 = "◆ABCD123◆ABCD123";
|
|
164
|
+
|
|
165
|
+
String str3 = "◆ABCD123◆ABCD123◆";
|
|
166
|
+
|
|
167
|
+
String str4 = "ABCD123";
|
|
168
|
+
|
|
169
|
+
String str5 = "";
|
|
170
|
+
|
|
171
|
+
String str6 = "ABCD123◆ABCD123";
|
|
172
|
+
|
|
173
|
+
|
|
174
|
+
|
|
175
|
+
String[] ary1 = split(str1, regex);
|
|
176
|
+
|
|
177
|
+
String[] ary2 = split(str2, regex);
|
|
178
|
+
|
|
179
|
+
String[] ary3 = split(str3, regex);
|
|
180
|
+
|
|
181
|
+
String[] ary4 = split(str4, regex);
|
|
182
|
+
|
|
183
|
+
String[] ary5 = split(str5, regex);
|
|
184
|
+
|
|
185
|
+
String[] ary6 = split(str6, regex);
|
|
186
|
+
|
|
187
|
+
|
|
188
|
+
|
|
189
|
+
System.out.println(Arrays.toString(ary1));
|
|
190
|
+
|
|
191
|
+
System.out.println(Arrays.toString(ary2));
|
|
192
|
+
|
|
193
|
+
System.out.println(Arrays.toString(ary3));
|
|
194
|
+
|
|
195
|
+
System.out.println(Arrays.toString(ary4));
|
|
196
|
+
|
|
197
|
+
System.out.println(Arrays.toString(ary5));
|
|
198
|
+
|
|
199
|
+
System.out.println(Arrays.toString(ary6));
|
|
200
|
+
|
|
201
|
+
}
|
|
202
|
+
|
|
203
|
+
|
|
204
|
+
|
|
205
|
+
private static String[] split(String str, String regex) {
|
|
206
|
+
|
|
207
|
+
String[] ary = str.split(regex);
|
|
208
|
+
|
|
209
|
+
|
|
210
|
+
|
|
211
|
+
if (ary.length >= 2 && ary[0].equals("")) {
|
|
212
|
+
|
|
213
|
+
List<String> tmp = new ArrayList<>(Arrays.asList(ary));
|
|
214
|
+
|
|
215
|
+
tmp.remove(0);
|
|
216
|
+
|
|
217
|
+
ary = tmp.toArray(new String[0]);
|
|
218
|
+
|
|
219
|
+
}
|
|
220
|
+
|
|
221
|
+
|
|
222
|
+
|
|
223
|
+
return ary;
|
|
224
|
+
|
|
225
|
+
}
|
|
226
|
+
|
|
227
|
+
}
|
|
228
|
+
|
|
229
|
+
```
|