質問編集履歴
4
追加記入
test
CHANGED
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File without changes
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test
CHANGED
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@@ -44,7 +44,7 @@
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Calculation calculation = new Calculation();
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Stand stand = new Stand();
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@@ -70,330 +70,248 @@
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private void exec(String[] args)throws IOException {
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if (isVaild(args)) {
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try {
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stand.prepare();
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toOrder(args);
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} catch(Exception e) {
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e.printStackTrace();
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}
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private void toOrder(String[] args) {
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try {
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for (int i = 0; i < args.length; i +=2 ) {
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String code = args[i];
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String num = args[i + 1];
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Item oneItem = stand.order(code, num);
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calculation.buy(oneItem, num);
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}
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calculation.pay();
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} e
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} catch(Exception e) {
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e.printStackTrace();
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}
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}
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private boolean isVaild(String[] args){
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return args.length >= 2 && args.length % 2 == 0 ;
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}
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```
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```Itemjava
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public class Item {
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private String codes = null;
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private String name = null;
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private String price = null;
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private String stock = null;
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public Item(String codes, String name, String price, String stock) {
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this.codes = codes;
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this.name = name;
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this.price = price;
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this.stock = stock;
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}
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public String getCodes() {
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return codes;
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}
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public String getName() {
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return name;
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}
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public String getPrice() {
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return price;
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}
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public boolean stock(String num) {
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int order = Integer.parseInt(num);
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int stock = Integer.parseInt(this.stock);
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return order <= stock;
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}
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}
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```
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```Calculationjava
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public class Calculation {
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private int sum;
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p
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public void buy(Item item,String num){
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int price = Integer.parseInt(item.getPrice())*Integer.parseInt(num);;
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sum += price;
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}
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public void pay() {
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System.out.println(sum + "円");
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}
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}
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```
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```Standjava
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import java.io.BufferedReader;
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232
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import java.io.FileNotFoundException;
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235
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import java.io.FileReader;
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import java.io.IOException;
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239
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import java.util.HashMap;
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240
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241
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import java.util.Map;
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242
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public class Stand {
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246
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247
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248
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249
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public Map<String, Item> items = new HashMap<String, Item>();
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250
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251
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252
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253
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public Stand() throws IOException {
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106
254
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107
255
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try {
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108
256
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257
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BufferedReader csvFile = new BufferedReader(new FileReader("shop.csv"));
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|
258
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259
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readFile(csvFile);
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260
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261
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csvFile.close();
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262
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109
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263
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} catch (FileNotFoundException e) {
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110
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111
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264
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112
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113
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String num = args[i + 1];
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114
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115
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-
Item oneItem = stand.order(code, num);
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116
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-
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117
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-
if (oneItem != null) {
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118
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119
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register.buy(oneItem, num);
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120
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121
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} else {
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122
|
-
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123
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-
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265
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System.out.println("ファイルがありません");
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266
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124
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-
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267
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+
throw e;
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268
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125
|
-
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269
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+
}
|
|
270
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+
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271
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+
}
|
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272
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+
|
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273
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+
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274
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275
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private void readFile(BufferedReader csvFile) throws IOException {
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276
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+
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277
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String line;
|
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278
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+
|
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279
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+
while ((line = csvFile.readLine()) != null) {
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280
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281
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+
String datas[] = line.split(",");
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282
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+
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283
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datas[0] = Integer.parseInt(datas[0]);
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284
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|
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285
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+
Item item = new Item(datas[0], datas[1], datas[2], datas[3]);
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286
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287
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items.put(datas[0], item);
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126
288
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127
289
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}
|
|
128
290
|
|
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129
|
-
register.pay();
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|
130
|
-
|
|
131
|
-
} catch(Exception e) {
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132
|
-
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133
|
-
e.printStackTrace();
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134
|
-
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135
291
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}
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136
292
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|
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137
293
|
}
|
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138
294
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295
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+
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296
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+
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297
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+
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298
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+
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299
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+
public Item order(String code, String num) {
|
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300
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+
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|
301
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+
Item item = items.get(code);
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302
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+
|
|
303
|
+
if (item.Stock(num)) {
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304
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+
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305
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return item;
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306
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+
|
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307
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}
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308
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|
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309
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+
return null;
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310
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|
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311
|
+
}
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312
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+
|
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139
313
|
}
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140
314
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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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144
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-
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145
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-
```
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146
|
-
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|
147
|
-
```Itemjava
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148
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-
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149
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public class Item {
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150
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-
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151
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152
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153
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private String itemCode = null;
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154
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-
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155
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156
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157
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private String name = null;
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158
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-
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159
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-
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160
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-
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161
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private String price = null;
|
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162
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-
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163
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-
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164
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-
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165
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private String quantity = null;
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166
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-
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167
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-
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168
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-
|
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169
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-
private String stock = null;
|
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170
|
-
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|
171
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-
|
|
172
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-
|
|
173
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private String unit = null;
|
|
174
|
-
|
|
175
|
-
|
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176
|
-
|
|
177
|
-
@SuppressWarnings("unused")
|
|
178
|
-
|
|
179
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-
private Item() {
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180
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-
|
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181
|
-
}
|
|
182
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-
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183
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-
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184
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-
|
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185
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-
public Item(String itemCode, String name, String price, String quantity, String stock, String unit) {
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186
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-
|
|
187
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-
this.itemCode = itemCode;
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188
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-
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189
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this.name = name;
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190
|
-
|
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191
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-
this.price = price;
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192
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-
|
|
193
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this.quantity = quantity;
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194
|
-
|
|
195
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this.stock = stock;
|
|
196
|
-
|
|
197
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this.unit = unit;
|
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198
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-
|
|
199
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-
}
|
|
200
|
-
|
|
201
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-
|
|
202
|
-
|
|
203
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-
public String getItemCode() {
|
|
204
|
-
|
|
205
|
-
return itemCode;
|
|
206
|
-
|
|
207
|
-
}
|
|
208
|
-
|
|
209
|
-
|
|
210
|
-
|
|
211
|
-
public String getName() {
|
|
212
|
-
|
|
213
|
-
return name;
|
|
214
|
-
|
|
215
|
-
}
|
|
216
|
-
|
|
217
|
-
|
|
218
|
-
|
|
219
|
-
public String getPrice() {
|
|
220
|
-
|
|
221
|
-
return price;
|
|
222
|
-
|
|
223
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-
}
|
|
224
|
-
|
|
225
|
-
public String getQuantity() {
|
|
226
|
-
|
|
227
|
-
return quantity;
|
|
228
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-
|
|
229
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-
}
|
|
230
|
-
|
|
231
|
-
|
|
232
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-
|
|
233
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public String getStock() {
|
|
234
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-
|
|
235
|
-
return stock;
|
|
236
|
-
|
|
237
|
-
}
|
|
238
|
-
|
|
239
|
-
|
|
240
|
-
|
|
241
|
-
public String getUnit() {
|
|
242
|
-
|
|
243
|
-
return unit;
|
|
244
|
-
|
|
245
|
-
}
|
|
246
|
-
|
|
247
|
-
|
|
248
|
-
|
|
249
|
-
public boolean checkStock(String num) {
|
|
250
|
-
|
|
251
|
-
int orderNum = Integer.parseInt(num)*Integer.parseInt(this.quantity);
|
|
252
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-
|
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253
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int stockNum = Integer.parseInt(this.stock);
|
|
254
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-
|
|
255
|
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return orderNum <= stockNum;
|
|
256
|
-
|
|
257
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-
}
|
|
258
|
-
|
|
259
|
-
}
|
|
260
|
-
|
|
261
|
-
```
|
|
262
|
-
|
|
263
|
-
```Registerjava
|
|
264
|
-
|
|
265
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public class Register {
|
|
266
|
-
|
|
267
|
-
|
|
268
|
-
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|
269
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-
private int sum;
|
|
270
|
-
|
|
271
|
-
|
|
272
|
-
|
|
273
|
-
public void buy(Item item,String num){
|
|
274
|
-
|
|
275
|
-
int price = Integer.parseInt(item.getPrice())*Integer.parseInt(num);
|
|
276
|
-
|
|
277
|
-
String unit = item.getUnit();
|
|
278
|
-
|
|
279
|
-
System.out.println(item.getItemCode() + item.getName() + num + unit + price + "円");
|
|
280
|
-
|
|
281
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-
sum += price;
|
|
282
|
-
|
|
283
|
-
}
|
|
284
|
-
|
|
285
|
-
|
|
286
|
-
|
|
287
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-
public void pay() {
|
|
288
|
-
|
|
289
|
-
System.out.println(sum + "円");
|
|
290
|
-
|
|
291
|
-
}
|
|
292
|
-
|
|
293
|
-
}
|
|
294
|
-
|
|
295
|
-
|
|
296
|
-
|
|
297
|
-
```
|
|
298
|
-
|
|
299
|
-
```Standjava
|
|
300
|
-
|
|
301
|
-
import java.io.BufferedReader;
|
|
302
|
-
|
|
303
|
-
import java.io.FileNotFoundException;
|
|
304
|
-
|
|
305
|
-
import java.io.FileReader;
|
|
306
|
-
|
|
307
|
-
import java.io.IOException;
|
|
308
|
-
|
|
309
|
-
import java.util.HashMap;
|
|
310
|
-
|
|
311
|
-
import java.util.Map;
|
|
312
|
-
|
|
313
|
-
|
|
314
|
-
|
|
315
|
-
public class Stand {
|
|
316
|
-
|
|
317
|
-
|
|
318
|
-
|
|
319
|
-
public Map<String, Item> items = new HashMap<String, Item>();
|
|
320
|
-
|
|
321
|
-
|
|
322
|
-
|
|
323
|
-
|
|
324
|
-
|
|
325
|
-
|
|
326
|
-
|
|
327
|
-
public Stand() throws IOException {
|
|
328
|
-
|
|
329
|
-
try {
|
|
330
|
-
|
|
331
|
-
BufferedReader csvFile = new BufferedReader(new FileReader("shop.csv"));
|
|
332
|
-
|
|
333
|
-
readFile(csvFile);
|
|
334
|
-
|
|
335
|
-
csvFile.close();
|
|
336
|
-
|
|
337
|
-
} catch (FileNotFoundException e) {
|
|
338
|
-
|
|
339
|
-
System.out.println("ファイルがありません");
|
|
340
|
-
|
|
341
|
-
throw e;
|
|
342
|
-
|
|
343
|
-
}
|
|
344
|
-
|
|
345
|
-
}
|
|
346
|
-
|
|
347
|
-
|
|
348
|
-
|
|
349
|
-
private void readFile(BufferedReader csvFile) throws IOException {
|
|
350
|
-
|
|
351
|
-
String line;
|
|
352
|
-
|
|
353
|
-
while ((line = csvFile.readLine()) != null) {
|
|
354
|
-
|
|
355
|
-
String datas[] = line.replaceAll("\"", "").split(",");
|
|
356
|
-
|
|
357
|
-
datas[0] = String.format("%04d",Integer.parseInt(datas[0]));
|
|
358
|
-
|
|
359
|
-
if (isValid(datas)) {
|
|
360
|
-
|
|
361
|
-
Item item = new Item(datas[0], datas[1], datas[2], datas[3], datas[4], datas[5]);
|
|
362
|
-
|
|
363
|
-
items.put(datas[0], item);
|
|
364
|
-
|
|
365
|
-
}
|
|
366
|
-
|
|
367
|
-
}
|
|
368
|
-
|
|
369
|
-
}
|
|
370
|
-
|
|
371
|
-
|
|
372
|
-
|
|
373
|
-
private boolean isValid(String[] datas) {
|
|
374
|
-
|
|
375
|
-
return datas.length == 6;
|
|
376
|
-
|
|
377
|
-
}
|
|
378
|
-
|
|
379
|
-
|
|
380
|
-
|
|
381
|
-
public Item order(String code, String num) {
|
|
382
|
-
|
|
383
|
-
Item item = items.get(code);
|
|
384
|
-
|
|
385
|
-
if (item.checkStock(num)) {
|
|
386
|
-
|
|
387
|
-
return item;
|
|
388
|
-
|
|
389
|
-
}
|
|
390
|
-
|
|
391
|
-
return null;
|
|
392
|
-
|
|
393
|
-
}
|
|
394
|
-
|
|
395
|
-
}
|
|
396
|
-
|
|
397
315
|
```
|
|
398
316
|
|
|
399
317
|
|
3
追加記入
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -6,7 +6,7 @@
|
|
|
6
6
|
|
|
7
7
|
|
|
8
8
|
|
|
9
|
-
shopping.javaの
|
|
9
|
+
shopping.javaの６行目の
|
|
10
10
|
|
|
11
11
|
Stand stand = new Stand();
|
|
12
12
|
|
2
追加記入
test
CHANGED
|
@@ -1 +1 @@
|
|
|
1
|
-
|
|
1
|
+
Javaでショッピングのプログラムを作っています。コンストラクターとクラスのインスタンス化をする際にエラーが出てしまいます。
|
test
CHANGED
|
File without changes
|
1
追加記入
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -4,7 +4,13 @@
|
|
|
4
4
|
|
|
5
5
|
shoppingというシステムを作っています。
|
|
6
6
|
|
|
7
|
+
|
|
8
|
+
|
|
9
|
+
shopping.javaの
|
|
10
|
+
|
|
11
|
+
Stand stand = new Stand();
|
|
12
|
+
|
|
7
|
-
以下のエラーメッセージが発生しま
|
|
13
|
+
に以下のエラーメッセージが発生しています。
|
|
8
14
|
|
|
9
15
|
エラーを解決したいです。
|
|
10
16
|
|
|
@@ -389,3 +395,9 @@
|
|
|
389
395
|
}
|
|
390
396
|
|
|
391
397
|
```
|
|
398
|
+
|
|
399
|
+
|
|
400
|
+
|
|
401
|
+
### 考えたこと
|
|
402
|
+
|
|
403
|
+
this()やsuper()を記入してみましたが、上手くいきませんでした。
|