我已经在互联网上搜索了大约一个半小时,但我一生都无法弄清楚我哪里出错了..帮助!
我的问题是,每次我尝试运行它时,我都不会收到错误,直到它搜索文件并且没有失败,它会回复“找不到文件”。我在 MAC 我想我正在正确输入目录但有些东西搞砸了..
(打开 numEven.dat 时)对于我的输入,我尝试了“numEven.dat”(将 dat 文件与 java 文件放在同一目录中)
我也试过“/Users/java/numEven.dat”和“Users/java/numEven.dat”我知道它在那个目录中。我究竟做错了什么?
主类文件:
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Scanner;
public class StatDriver
{
public static void main(String[] args)
{
String fileName = "";
Scanner scan = new Scanner(System.in);
double[] array = new double[20];
System.out.print(" Enter file name: ");
fileName = scan.next();
System.out.println("\n \n \n \n My Grades - View Statistics");
System.out.println(" ------------------------");
// int valueCount = readFile(array,fileName);
array = readFile(array, fileName);
Stat stat = new Stat(array, array.length);
// call each calc on Stat class and display results for each method
stat.calcAvg();
stat.calcMedian();
stat.findMax();
stat.findMin();
// print the return values for each of the above out to the user
}
public static double[] readFile(double[] array, String fileName)
{
int valueCount = 0;
FileIO importFile = new FileIO ();
importFile.main(array, fileName);
System.out.println(array);
valueCount = array.length;
// return valueCount;
return array;
}
}
文件IO类:
import java.util.Scanner;
import java.io.*;
public class FileIO
{
public void main (double[] array, String fileName)
{
double [] num = new double[5];
Scanner inFile;
int i = 0;
try
{
System.out.println(fileName);
inFile = new Scanner(new File("fileName"));
while(inFile.hasNextDouble())
{
array[i] = inFile.nextDouble();
i++;
}
inFile.close();
for(int x = 0; x < i; x++)
System.out.println(" " + num[x]);
}
catch(FileNotFoundException e)
{
System.out.println (" File not found");
}
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println (" array index too large");
}
}
}