1.构造方法
1.1 File file = new File("c:\\demo\\a.txt")
1.2 File file = new File("c:\\demo","a.txt")
1.3 File file = new File("c:\纤哗\demo")
File file2 = new File(file,"a.txt")
2.File类的功能
1):创建功能
public boolean createNewFile()
public boolean mkdir()
public boolean mkdirs()
2):删除功能
public boolean delete()
3):重命名功能
public boolean renameTo(File file)
4):判断功能
public boolean isDirectory()
public boolean isFile()
public boolean exists()
public boolean canRead()
public boolean canWrite()
public boolean isHidden()
5):获取功能
public String getName()
public String getAbsolutePath()//获取绝对路径,如果file对象中本身就是绝对路径,就和getPath()相同
public String getPath()
public long length()
public long lastModified()
6):高级获取功能
public String[] list()
public File[] listFiles()
7):过滤器功能
public String[] list(FileNameFilter filter)
public File[] listFiles(FileNameFilter filter)
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