我有一个文件夹里面存放了一组文件，它们的命名都以相似的名称开头，只有一个文件不同。以下是一个例子:
Coordinate.txt
Spectrum_1.txt
Spectrum_2.txt
Spectrum_3.txt
.
.
.
Spectrum_11235
我能够列出指定文件夹中的所有文件，但列表不按光谱号的升序排列。例如：执行程序时，我会得到以下结果：
Spectrum_999.txt
Spectrum_9990.txt
Spectrum_9991.txt
Spectrum_9992.txt
Spectrum_9993.txt
Spectrum_9994.txt
Spectrum_9995.txt
Spectrum_9996.txt
Spectrum_9997.txt
Spectrum_9998.txt
Spectrum_9999.txt
但是这个顺序是不正确的。在Spectrum_999.txt文件之后应该有Spectrum_1000.txt文件。有人可以帮忙吗？以下是代码：
import java.io.*;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;
public class FileInput {
public void userInput()
{
Scanner scanner = new Scanner( System.in );
System.out.println("Enter the file path: ");
String dirPath = scanner.nextLine(); // Takes the directory path as the user input
File folder = new File(dirPath);
if(folder.isDirectory())
{
File[] fileList = folder.listFiles();
Arrays.sort(fileList);
System.out.println("\nTotal number of items present in the directory: " + fileList.length );
// Lists only files since we have applied file filter
for(File file:fileList)
{
System.out.println(file.getName());
}
// Creating a filter to return only files.
FileFilter fileFilter = new FileFilter()
{
@Override
public boolean accept(File file) {
return !file.isDirectory();
}
};
fileList = folder.listFiles(fileFilter);
// Sort files by name
Arrays.sort(fileList, new Comparator()
{
@Override
public int compare(Object f1, Object f2) {
return ((File) f1).getName().compareTo(((File) f2).getName());
}
});
//Prints the files in file name ascending order
for(File file:fileList)
{
System.out.println(file.getName());
}
}
}
}