在我的程序中，我试图读取包含字符串，布尔值和双打的文件。如果它在填充数组时确定它不是双精度，我试图让它跳过一条线。这是通过首先检查线路上是否有数据来完成的。然后它确定第一个字符是否是数字。但是，当我使用Arrays.deepToString打印所谓的填充数组时，它会显示：
[[2.33, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], ...
我想知道是否有人能告诉我为什么它没有正确填充。以下是示例代码：
public static double[][] readFile(String fileName) throws IOException
{
double data[][] = new double[30][6];
int indexRow = 0, indexCol = 0;
File file = new File(fileName);
Scanner input = new Scanner(file);
while(input.hasNext())
{
String temp = input.nextLine();
if(temp.trim().length() > 0)
{
if(Character.isDigit(temp.charAt(0)))
{
data[indexRow][indexCol] = input.nextDouble();
if(indexCol < 6) indexCol++;
if(indexRow < 30 && indexCol % 6 == 0)
{
indexRow++;
indexCol = 0;
}
}
else{}
}
else
break;
}
System.out.println(Arrays.deepToString(data));
return data;
}
这是一个文件示例（它应该只用双打填充数组）：
Washington Capitals
3.02
2.33
85.2
30.6
28.4
True
Dallas Stars
3.23
2.78
82.3
32.0
28.9
True
St. Louis Blues
2.67
2.40
85.1
30.2
29.7
True
提前致谢。
修改 这是当前的数组：
[[3.02, 2.33, 85.2, 30.6, 28.4], [3.23, 2.78, 82.3, 32.0, 28.9], [2.67, 2.4, 85.1, 30.2, 29.7], [2.94, 2.43, 84.4, 33.2, 29.7], [2.83, 2.44, 79.5, 28.8, 29.5], [2.85, 2.52, 80.3, 30.5, 30.8], [2.62, 2.29, 87.2, 30.3, 27.5], [2.72, 2.34, 81.4, 32.0, 27.5], [2.84, 2.62, 78.2, 28.5, 30.4], [2.77, 2.57, 84.5, 29.4, 30.4], [2.89, 2.52, 80.5, 30.4, 27.4], [2.73, 2.41, 84.0, 29.3, 28.9], [2.73, 2.6, 81.2, 30.6, 27.3], [2.57, 2.56, 80.5, 31.0, 30.7], [2.88, 2.78, 82.2, 32.0, 30.4], [2.55, 2.67, 81.5, 29.7, 29.7], [2.6, 2.49, 77.9, 29.0, 28.6], [2.39, 2.7, 84.3, 29.9, 27.6], [2.8, 2.94, 75.8, 28.4, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0]]
以下是完整档案：
Carolina Hurricanes
2.39
2.70
84.3
29.9
27.6
False
Ottawa Senators
2.80
2.94
75.8
28.4
32.8
False
New Jersey Devils
2.22
2.46
83.0
24.4
28.6
False
Colorado Avalanche
2.59
2.93
80.2
28.6
32.3
False
Montréal Canadiens
2.63
2.84
81.9
30.5
29.4
False
Buffalo Sabres
2.43
2.62
82.6
29.5
30.6
False
Winnipeg Jets
2.59
2.88
78.4
29.6
29.5
False
Arizona Coyotes
2.54
2.98
77.3
27.6
31.0
False
Calgary Flames
2.79
3.13
75.5
29.2
29.0
False
Columbus Blue Jackets
2.60
3.02
81.0
29.1
31.1
False
Vancouver Canucks
2.27
2.91
81.1
28.2
32.5
False
Edmonton Oilers
2.43
2.95
81.1
29.1
31.1
False
Toronto Maple Leafs
2.34
2.93
81.6
30.7
30.5
False
答案 0 :(得分：0)
这段代码非常适合我你的示例输入
public static double[][] readFile(String fileName) throws IOException {
double data[][] = new double[30][6];
int indexRow = 0, indexCol = 0;
File file = new File(fileName);
try (Scanner input = new Scanner(file)) {
while (input.hasNext()) {
String temp = input.nextLine();
if (temp.trim().length() == 0) {
continue;
} else {
if (Character.isDigit(temp.charAt(0))) {
data[indexRow][indexCol] = Double.parseDouble(temp);
if (indexCol < 6)
indexCol++;
if (indexRow < 30 && indexCol % 6 == 0) {
indexRow++;
indexCol = 0;
}
} else {
//do something
}
}
}
}
System.out.println(Arrays.deepToString(data));
return data;
}
这是我测试它的方式
public static void main(String[] args) throws IOException {
double[][] result = readFile("array.txt");
for (int i = 0; i < result.length; i++) {
boolean isFirst = true;
for (int k = 0; k < result[i].length; k++) {
if (isFirst)
isFirst = false;
else
System.out.print(", ");
System.out.printf("%5s", result[i][k]);
}
System.out.println();
}
}
这是输出
[[3.02, 2.33, 85.2, 30.6, 28.4, 3.23], [2.78, 82.3, 32.0, 28.9, 2.67, 2.4], [85.1, 30.2, 29.7, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]]
3.02, 2.33, 85.2, 30.6, 28.4, 3.23
2.78, 82.3, 32.0, 28.9, 2.67, 2.4
85.1, 30.2, 29.7, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
0.0, 0.0, 0.0, 0.0, 0.0, 0.0
我的函数readFile用BufferedReader实现
public static double[][] readFile(String fileName) throws IOException {
double data[][] = new double[30][6];
int indexRow = 0, indexCol = 0;
File file = new File(fileName);
try (BufferedReader input = new BufferedReader(new FileReader(file))) {
String temp = input.readLine();
while (temp != null) {
if (temp.trim().length() > 0) {
if (Character.isDigit(temp.charAt(0))) {
data[indexRow][indexCol] = Double.parseDouble(temp);
if (indexCol < 6)
indexCol++;
if (indexRow < 30 && indexCol % 6 == 0) {
indexRow++;
indexCol = 0;
}
} else {
//do something
}
}
temp = input.readLine();
}
}
System.out.println(Arrays.deepToString(data));
return data;
}