I followed this question:
Now in my case i have 720 files named in this way: "dom 24 mar 2013_00.50.35_128.txt", every file has a different date and time. In testing phase i used Scanner, with a specific txt file, to do some operations on it:
Scanner s = new Scanner(new File("stuff.txt"));
My question is:
How can i reuse scanner and read all 720 files without having to set the precise name on scanner?
Thanks
Assuming you have all the files in one place:
File dir = new File("path/to/files/");
for (File file : dir.listFiles()) {
Scanner s = new Scanner(file);
...
s.close();
}
Note that if you have any files that you don't want to include, you can give listFiles() a FileFilter argument to filter them out.
Yes, create your file object by pointing it to a directory and then list the files of that directory.
File dir = new File("Dir/ToYour/Files");
if(dir.isDir()) {
for(File file : dir.listFiles()) {
if(file.isFile()) {
//do stuff on a file
}
}
} else {
//do stuff on a file
}
You can try this in this way
File folder = new File("D:\\DestFile");
File[] listOfFiles = folder.listFiles();
for (File file : listOfFiles) {
if (file.isFile()&&(file.getName().substring(file.getName().lastIndexOf('.')+1).equals("txt"))) {
// Scanner
}
}
File file = new File(folderNameFromWhereToRead);
if(file!=null && file.exists()){
File[] listOfFiles = file.listFiles();
if(listOfFiles!=null){
for (int i = 0; i < listOfFiles.length; i++) {
if (listOfFiles[i].isFile()) {
// DO work
}
}
}
}
if(listOfFiles!=null) is unnecessary. You just created the listOfFiles so how can it be null?if(file!=null)... you're testing whether an object reference exist which you just made prior to the test!
lisOfFiles is okay (it could happen if the path exists but is a file) but on the file isn't required. +1 for the isFile() check anyway.listOfFiles because I would have written my code to first check if file is a directory and then processed listFiles().