Java IO.pdf - Nguyen Dang Binh

}
}
// Work around annoying AWT non-daemon thread bug.
System.exit(0);
public boolean accept(File dir, String name) {
}
if (name.endsWith(".java")) return true;
else if (name.endsWith(".jav")) return true;
else if (name.endsWith(".html")) return true;
else if (name.endsWith(".htm")) return true;
else if (name.endsWith(".txt")) return true;
else if (name.endsWith(".text")) return true;
return false;
public static File getFile() throws IOException {
}
// dummy Frame, never shown
Frame parent = new Frame();
FileDialog fd = new FileDialog(parent, "Please choose a file:",
FileDialog.LOAD);
fd.setFilenameFilter(new TextChooser());
fd.show();
// Program stops here until user selects a file or cancels.
String dir = fd.getDirectory();
String file = fd.getFile();
// Clean up our windows, they won't be needed again.
parent.dispose();
fd.dispose();
if (dir == null || file == null) { // User cancelled the dialog.
return null;
}
return new File(dir, file);
Java I/O
This program demonstrates one problem of relying on file extensions to determine file type.
There are many other file extensions that indicate text files; for example, .c, .cc, .pl, .f, and
many more. Furthermore, there are a lot of text files, especially on Macintoshes, that don't
have any extension at all. This program completely ignores all those files.
You do not necessarily have to write a new subclass for each different file filter. Example
13.3 demonstrates a class that can be configured with different lists of filename extensions.
Every file with an extension in the list passes the filter. Others don't.
Example 13.3. ExtensionFilenameFilter
package com.macfaq.io;
import java.awt.*;
import java.util.*;
import java.io.*;
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