File

File f = new File("e:\\s\\test\\a.txt");

File f = new File(a.txt);　　/* 在工作空间关联文件 */

public boolean exists()

public boolean isHidden()

public boolean canRead()

public boolean canWrite()

public boolean isFile()

public boolean isDirectory()

public String getName()

public String getPath()

public String getParent()

public long lastModified()

public long length()

public boolean delete()

public boolean createNewFile() throws IOException

public boolean mkdir()

public boolean mkdirs()