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