Язык Java

Объект Filejava.io

File● public static final char separatorChar● public static final String separator● public static final char pathSeparatorChar● public static final String pathSeparator● public File(String pathname)● public File(String parent, String child)● public File(File parent, String child)● public File(URI uri)● public String getName()● public String getParent()● public File getParentFile()● public String getPath()● public boolean isAbsolute()● public String getAbsolutePath()● public File getAbsoluteFile()● public String getCanonicalPath() throws IOException● public File getCanonicalFile() throws IOException

File (продолжение)● public boolean canRead()● public boolean canWrite()● public boolean exists()● public boolean isDirectory()● public boolean isFile()● public boolean isHidden()● public long lastModified()● public long length()● public boolean createNewFile() throws IOException● public boolean delete()● public String[] list()● public String[] list(FilenameFilter filter)● public File[] listFiles()● public File[] listFiles(FilenameFilter filter)● public File[] listFiles(FileFilter filter)● public boolean mkdir()● public boolean mkdirs()● public boolean renameTo(File dest)

File (продолжение)● public boolean setReadOnly()● public boolean setWritable(boolean writable, boolean

ownerOnly)● public boolean setWritable(boolean writable)● public boolean setReadable(boolean readable, boolean

ownerOnly)● public boolean setReadable(boolean readable)● public boolean setExecutable(boolean executable, boolean

ownerOnly)● public boolean setExecutable(boolean executable)● public boolean canExecute()● public long getTotalSpace()● public long getFreeSpace()● public long getUsableSpace()● public static File createTempFile(String prefix, String suffix,

File directory)● public static File createTempFile(String prefix, String suffix)

throws IOException

Пример использования● private File f;

private Date d; private File f1; public FileTestClass(String name, String name2) { f1=new File(name); d=new Date(f1.lastModified()); f=new File(name2); } public String[] outAllFiles() { File[] fs=f.listFiles(new MyFilter(d)); String[] ss=new String[fs.length]; for(int i=0;i<fs.length;++i) ss[i]=fs[i].getPath(); return ss; }

Интерфейс FileFilter

● public interface FileFilter{boolean accept(File pathname);

}

Пример использования

● public class MyFilter implements FileFilter{ private Date date; public MyFilter(Date date) { this.date=date; } public boolean accept(File pathname) { Date date1 = new Date(pathname.lastModified()); return (date.getTime()>=date1.getTime()); }}

Интерфейс FilanameFilter

● interface FilenameFilter {boolean accept(File dir, String name);

}

Работа со временем

● class Date● public Date(long date)

● class GregorianCalendar● public GregorianCalendar(int year, int month, int

dayOfMonth, int hourOfDay, int minute, int second)● public final Date getTime()● public final void setTime(Date date)

Конец

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