package net.sourceforge.tuned; import java.io.File; public final class FileUtil { public final static long KILO = 1024; public final static long MEGA = KILO * 1024; public final static long GIGA = MEGA * 1024; public static String formatSize(long size) { if (size >= MEGA) return String.format("%,d MB", size / MEGA); else if (size >= KILO) return String.format("%,d KB", size / KILO); else return String.format("%,d Byte", size); } public static boolean hasExtension(File file, String... extensions) { if (file.isDirectory()) return false; return hasExtension(file.getName(), extensions); } public static boolean hasExtension(String filename, String... extensions) { String extension = getExtension(filename, false); for (String ext : extensions) { if (ext.equalsIgnoreCase(extension)) return true; } return false; } public static String getExtension(File file) { return getExtension(file, false); } public static String getExtension(File file, boolean includeDot) { return getExtension(file.getName(), includeDot); } public static String getExtension(String name, boolean includeDot) { int dotIndex = name.lastIndexOf("."); // .config -> no extension, just hidden if (dotIndex >= 1) { int startIndex = dotIndex; if (!includeDot) startIndex += 1; if (startIndex <= name.length()) { return name.substring(startIndex, name.length()); } } return ""; } public static String getNameWithoutExtension(String name) { int dotIndex = name.lastIndexOf("."); if (dotIndex < 1) return name; return name.substring(0, dotIndex); } public static String getFileName(File file) { if (file.isDirectory()) return getFolderName(file); return getNameWithoutExtension(file.getName()); } public static String getFolderName(File file) { String name = file.getName(); if (!name.isEmpty()) return name; // file might be a drive (only has a path, but no name) return file.toString(); } public static String getFileType(File file) { if (file.isDirectory()) return "Folder"; String extension = getExtension(file.getName(), false); if (!extension.isEmpty()) return extension; // some file with no suffix return "File"; } /** * Dummy constructor to prevent instantiation. */ private FileUtil() { throw new UnsupportedOperationException(); } }