包含哥伦比亚麦德林205套公寓的特征（estrato，大小，年龄，卧室，浴室，地板和标签）的txt文件，我需要加载文件并将每个特征保存在自己的特定变量中，以便我可以通过转换方法传递它们以标准化数据，以便稍后用于KNN分类的距离公式。我有当前的代码：
import java.util.*;
import java.io.*;
/**
* collection of properties
* using arraylist
*/
public class Apartments
{
ArrayList<Property> apartmentList = new ArrayList<>();
String estrato = " ";
String size = " ";
String age = " ";
String beds = " ";
String baths = " ";
String floor = " ";
String label = " ";
public void convertFile () throws FileNotFoundException {
Scanner input = new Scanner(new File("ApartmentsFullList.txt"));
while(input.hasNextLine()){
String line = input.nextLine();
Scanner lineScan = new Scanner(line);
for(int i = 0; i < line.length(); i++){
char start = line.charAt(i);
if(start == '{'){
estrato = lineScan.next();
size = lineScan.next();
age = lineScan.next();
beds = lineScan.next();
baths = lineScan.next();
floor = lineScan.next();
}
}
System.out.println(estrato + " " + size + " " + age + " " + beds + " " +
baths + " " + floor + " " + label);
}
}
}
和以下.txt文件：
01-Los Balsos 1380m {6, 430, 4, 3, 4, 22, Luxury},
02-El Tesoro 1100m {6, 263, 2, 3, 4, 21, Luxury},
03-Las Lomas 1030m {6, 270, 2, 3, 4, 16, Luxury},
04-Las Lomas 1020m {6, 270, 2, 3, 6, 18, Luxury},
05-Las Lomas 2600m {6, 780, 3, 7, 9, 33, Luxury},
06-Los Balsos 1100m {6, 380, 3, 4, 5, 14, Luxury},
07-Laureles 1350m {6, 494, 2, 3, 5, 17, Luxury},
08-Los Balsos 1100m {6, 445, 3, 4, 5, 10, Luxury},
09-Alejandria 1584m {6, 288, 1, 3, 4, 25, Luxury},
10-La Florida 1200m {6, 425, 3, 4, 6, 12, Luxury},
11-San Lucas 1200m {6, 200, 1, 3, 4, 19, Luxury},
12-Los Balsos 1250m {6, 347, 3, 4, 6, 23, Luxury},
13-Las Lomas 1300m {6, 350, 2, 6, 6, 9, Luxury},
14-El Tesoro 1350m {6, 240, 1, 3, 5, 11, Luxury},
15-San Lucas 2800m {6, 760, 1, 5, 8, 31, Luxury},
16-El Tesoro 1300m {6, 315, 2, 4, 5, 8, Luxury},
17-Las Palmas 1820m {6, 318, 1, 4, 7, 24, Luxury},
18-Las Lomas 1500m {6, 429, 1, 3, 5, 13, Luxury},
19-El Tesoro 2000m {6, 500, 3, 5, 7, 11, Luxury},
20-San Lucas 1800m {6, 603, 3, 5, 5, 17, Luxury},
21-El Tesoro 1300m {6, 315, 1, 3, 5, 5, Luxury},
22-El Tesoro 1300m {6, 294, 1, 4, 5, 16, Luxury},
23-San Lucas 2400m {6, 300, 1, 5, 5, 21, Luxury},
24-El Poblado 1180m {6, 382, 2, 3, 4, 12, Luxury},
25-Castropol 1190m {6, 302, 1, 3, 4, 26, Luxury},
26-El Poblado 2500m {6, 500, 1, 5, 8, 30, Luxury},
27-La Calera 1600m {6, 520, 3, 7, 7, 21, Luxury},
28-Castropol 1190m {6, 302, 1, 4, 4, 32, Luxury},
29-Las Lomas 1530m {6, 338, 2, 3, 5, 24, Luxury},
30-Superior 5100m {6, 578, 1, 4, 6, 27, Luxury},
31-Alejandria 930m {6, 186, 1, 4, 4, 19, Upper},
32-Lleras 940m {6, 175, 2, 2, 3, 11, Upper},
33-El Poblado 900m {6, 181, 1, 3, 3, 6, Upper},
34-San Lucas 800m {6, 175, 2, 3, 4, 7, Upper},
35-El Poblado 890m {5, 175, 3, 2, 3, 5, Upper},
36-San Lucas 900m {6, 148, 1, 3, 4, 19, Upper},
37-El Tesoro 800m {6, 180, 2, 3, 5, 21, Upper},
38-Los Balsos 930m {6, 186, 2, 3, 4, 12, Upper},
39-Los Balsos 990m {5, 300, 4, 3, 4, 4, Upper},
40-El Poblado 960m {6, 153, 1, 2, 3, 12, Upper},
41-El Poblado 900m {6, 186, 2, 3, 4, 6, Upper},
42-El Poblado 970m {6, 225, 4, 3, 5, 2, Upper},
43-San Lucas 920m {5, 168, 1, 3, 4, 4, Upper},
44-Laureles 920m {5, 230, 3, 3, 5, 22, Upper},
45-Superior 880m {5, 227, 2, 3, 4, 12, Upper},
46-El Poblado 980m {5, 298, 4, 4, 5, 11, Upper},
47-La Calera 890m {6, 251, 2, 3, 3, 9, Upper},
48-Los Balsos 950m {6, 285, 3, 4, 7, 3, Upper},
49-San Lucas 860m {6, 162, 1, 3, 4, 13, Upper},
50-Envigado 750m {5, 153, 1, 3, 3, 7, Upper},
51-M de Oro 830m {6, 209, 2, 3, 5, 18, Upper},
52-Superior 850m {6, 220, 2, 4, 4, 15, Upper},
53-Inferior 840m {6, 171, 1, 4, 5, 14, Upper},
54-Inferior 860m {5, 300, 4, 4, 6, 8, Upper},
55-San Lucas 850m {6, 175, 3, 3, 3, 11, Upper},
56-El Poblado 680m {6, 290, 3, 4, 3, 17, Upper},
57-Tomatera 805m {6, 251, 2, 4, 4, 4, Upper},
58-El Poblado 850m {6, 260, 2, 4, 4, 7, Upper},
59-Vizcaya 875m {5, 265, 4, 3, 5, 16, Upper},
60-Castropol 750m {5, 298, 4, 4, 5, 11, Upper},
61-Los Balsos 550m {5, 113, 1, 2, 3, 13, UM},
62-El Poblado 599m {6, 130, 1, 3, 2, 3, UM},
63-El Poblado 550m {6, 120, 1, 3, 3, 7, UM},
64-La Linde 520m {6, 109, 1, 2, 3, 5, UM},
65-El Poblado 560m {5, 120, 2, 2, 3, 7, UM},
66-El Poblado 530m {6, 172, 4, 3, 4, 8, UM},
67-El Poblado 610m {6, 144, 2, 3, 4, 7, UM},
68-El Tesoro 555m {6, 152, 2, 3, 4, 11, UM},
69-Villa Paula 520m {6, 165, 3, 3, 4, 1, UM},
70-La Calera 630m {6, 135, 1, 4, 4, 9, UM},
71-Simesa 521m {6, 124, 2, 3, 2, 16, UM},
72-El Tesoro 550m {6, 215, 4, 3, 3, 2, UM},
73-La Linde 520m {6, 160, 3, 3, 4, 4, UM},
74-La Florida 650m {5, 290, 4, 4, 4, 1, UM},
75-El Poblado 650m {6, 187, 2, 4, 4, 8, UM},
76-San Lucas 520m {6, 277, 4, 3, 4, 1, UM},
77-Castropol 550m {6, 117, 1, 3, 4, 5, UM},
78-San Lucas 570m {6, 140, 3, 4, 4, 7, UM},
79-Astorga 650m {6, 187, 2, 3, 5, 7, UM},
80-El Tesoro 545m {6, 136, 2, 2, 3, 6, UM},
81-Las Lomas 590m {6, 178, 3, 3, 4, 10, UM},
82-San Lucas 650m {6, 128, 1, 2, 3, 1, UM},
83-La Florida 650m {6, 230, 4, 4, 4, 8, UM},
84-Alejandria 600m {6, 210, 3, 3, 4, 1, UM},
85-Las Lomas 550m {5, 139, 1, 3, 3, 9, UM},
86-Los Parra 545m {6, 125, 1, 2, 3, 14, UM},
87-El Poblado 500m {6, 239, 4, 3, 3, 1, UM},
88-Alejandria 595m {6, 113, 1, 2, 3, 4, UM},
89-Castellana 600m {5, 200, 4, 3, 3, 2, UM},
90-Envigado 540m {5, 125, 1, 2, 3, 7, UM},
91 – {5, 109, 3, 4, 3, 8, Middle},
92- {5, 97, 3, 3, 3, 9, Middle},
93- {4, 93, 4, 3, 2, 6, Middle},
94- {6, 126, 3, 2, 3, 6, Middle},
95- {6, 124, 4, 3, 2, 1, Middle},
96- {5, 127, 3, 3, 3, 3, Middle},
97- {5, 115, 4, 2, 1, 2, Middle},
98- {5, 110, 4, 4, 2, 1, Middle},
99- {4, 72, 3, 3, 2, 5, Middle},
100- {5, 71, 1, 2, 1, 10, Middle},
101- {4, 72, 1, 2, 2, 19, Middle},
102- {4, 69, 3, 3, 2, 12, Middle},
103- {4, 90, 1, 3, 3, 24, Middle},
104- {3, 68, 4, 3, 2, 10, Middle},
105- {5, 76, 3, 1, 3, 13, Middle},
106- {6, 142, 4, 3, 4, 1, Middle},
107- {6, 71, 4, 3, 2, 2, Middle},
108- {3, 116, 4, 3, 5, 1, Middle},
109- {6, 55, 1, 2, 2, 3, Middle},
110- {6, 150, 4, 3, 3, 8, Middle},
112- {4, 80, 3, 2, 3, 4, Middle},
113- {3, 62, 3, 3, 2, 2, Middle},
114- {6, 154, 4, 3, 3, 9, Middle},
115- {4, 70, 3, 3, 2, 5, Middle},
116- {6, 119, 4, 3, 4, 3, Middle},
117- {3, 55, 3, 3, 2, 2, Middle}
118- {4, 72, 1, 2, 2, 4, Middle},
119- {5, 170, 3, 4, 3, 8, Middle}
120- {5, 98, 1, 3, 2, 17, Middle},
121- {5, 75, 4, 2, 2, 4, Middle},
122- {6, 76, 3, 2, 2, 3, Middle},
123- {3, 98, 4, 3, 2, 1, Middle},
124- {4, 64, 1, 2, 2, 9, Middle},
125- {5, 108, 4, 3, 2, 3, Middle},
126- {5, 125, 4, 4, 3, 1, Middle},
127- {5, 124, 3, 3, 3, 3, Middle},
128- {5, 106, 3, 3, 3, 5, Middle},
129- {5, 118, 4, 3, 3, 6, Middle},
130- {5, 88, 3, 3, 3, 1, Middle},
131- {5, 79, 3, 3, 2, 6, Middle},
132- {5, 120, 3, 3, 2, 4, Middle},
133- {6, 78, 1, 2, 2, 29, Middle},
134- {5, 95, 1, 3, 3, 12, Middle},
135- {5, 78, 4, 3, 2, 3, Middle},
136- {5, 80, 3, 3, 2, 4, Middle},
137- {5, 78, 3, 2, 2, 1, Middle},
138- {5, 120, 4, 3, 3, 4, Middle},
139- {5, 92, 3, 3, 2, 7, Middle},
140- {5, 110, 3, 3, 3, 2, Middle},
141- {6, 124, 1, 3, 3, 1, Middle},
142- {5, 96, 3, 3, 2, 9, Middle},
143- {5, 98, 4, 3, 3, 3, Middle},
144- {5, 92, 3, 2, 3, 8, Middle},
145- {4, 32, 4, 1, 1, 2, LM},
146- {3, 45, 3, 2, 1, 1, LM},
147- {3, 50, 2, 3, 1, 2, LM},
148- {3, 48, 2, 3, 2, 3, LM},
149- {2, 48, 1, 3, 2, 1, LM},
150- {2, 48, 1, 3, 2, 2, LM},
151- {4, 45, 2, 2, 1, 13, LM},
152- {4, 45, 3, 3, 1, 11, LM},
153- {4, 30, 1, 1, 1, 24, LM},
154- {3, 45, 2, 3, 1, 13, LM},
155- {3, 60, 2, 3, 1, 4, LM},
156- {3, 50, 2, 2, 1, 1, LM},
157- {3, 48, 2, 3, 1, 3, LM},
158- {3, 30, 1, 1, 1, 2, LM},
159- {4, 30, 3, 2, 1, 1, LM},
160- {3, 37, 1, 2, 1, 11, LM},
161- {3, 54, 2, 3, 2, 10, LM},
162- {3, 42, 1, 3, 1, 4, LM},
163- {3, 45, 2, 3, 1, 3, LM},
164- {3, 54, 3, 3, 2, 10, LM},
165- {3, 54, 2, 3, 2, 9, LM},
166- {3, 54, 1, 2, 1, 4, LM},
167- {3, 80, 4, 3, 2, 2, LM},
168- {3, 50, 1, 3, 2, 13, LM},
169- {3, 34, 2, 1, 1, 3, LM},
170- {3, 55, 1, 3, 1, 1, LM},
171- {2, 45, 1, 2, 1, 5, LM},
172- {3, 42, 3, 2, 1, 12, LM},
173- {3, 39, 1, 1, 1, 3, LM},
174- {4, 45, 3, 2, 1, 7, LM},
175- {3, 38, 1, 2, 1, 3, LM},
176- {2, 42, 1, 2, 1, 4, Lower},
177- {1, 43, 1, 3, 1, 4, Lower},
178- {2, 25, 1, 1, 1, 1, Lower},
179- {2, 42, 1, 2, 1, 1, Lower},
180- {1, 49, 1, 2, 1, 1, Lower},
181- {1, 46, 2, 3, 1, 2, Lower},
182- {2, 18, 1, 1, 1, 4, Lower},
183- {2, 45, 3, 3, 1, 2, Lower},
184- {3, 18, 1, 1, 1, 3, Lower},
185- {1, 40, 2, 2, 1, 2, Lower},
186- {2, 40, 2, 2, 1, 4, Lower},
187- {2, 41, 2, 3, 1, 2, Lower},
188- {3, 50, 3, 2, 1, 1, Lower},
189- {1, 44, 4, 2, 1, 1, Lower},
190- {1, 55, 3, 3, 1, 2, Lower},
191- {2, 17, 1, 1, 1, 1, Lower},
192- {1, 40, 3, 2, 1, 1, Lower},
193- {1, 41, 4, 2, 1, 4, Lower},
194- {1, 40, 2, 2, 1, 3, Lower},
195- {3, 16, 1, 1, 1, 2, Lower},
196- {3, 45, 1, 2, 1, 1, Lower},
197- {3, 48, 1, 3, 1, 2, Lower},
198- {2, 43, 1, 3, 1, 4, Lower},
199- {1, 50, 4, 2, 1, 1, Lower},
200- {1, 60, 4, 2, 1, 1, Lower},
201- {1, 40, 1, 2, 1, 2, Lower},
202- {3, 32, 1, 1, 1, 1, Lower},
203- {2, 44, 1, 2, 1, 3, Lower},
204- {1, 40, 4, 2, 1, 1, Lower},
205- {2, 36, 2, 2, 1, 5, Lower}
但是当我打印时我得到所有文本，我需要的就是大括号内的内容
如果有人可以在我的具体案例中回答我的问题和/或对KNN java实施有任何指导，那将会有很大的帮助！ 感谢
答案 0 :(得分：-1)
删除此行
if (start == '{') {
Scanner lineScan = new Scanner(line.substring(i));
estrato = lineScan.next();
size = lineScan.next();
age = lineScan.next();
beds = lineScan.next();
baths = lineScan.next();
floor = lineScan.next();
break; // consider adding a break here
}
将其移至
{问题是你在搜索{{1}}字符所在的位置之前就已经为整行做了扫描仪。