Program
import java.io.File;
import java.io.IOException;
public class Lengthoffile
{
public static void main(String[] args)
{
try
{
File f = new File("D:\\doc.txt");
if(f.createNewFile())
{
System.out.println("file created" + f.getName());
} else
{
System.out.println("file already exist");
long value=f.length();
System.out.println("length:" + value);
}
}
catch(IOException e)
{
System.out.println("error occured");
e.printStackTrace();
}
}
}Output
file already exist length:0
Description
public long length()
Returns the length of the file denoted by this abstract pathname. The return value is unspecified if this pathname denotes a directory.
Where it is required to distinguish an I/O exception from the case that 0L is returned, or where several attributes of the same file are required at the same time, then the Files.readAttributes method may be used.
Returns:
The length, in bytes, of the file denoted by this abstract pathname, or 0L if the file does not exist. Some operating systems may return 0L for pathnames denoting system-dependent entities such as devices or pipes.
Throws:
SecurityException – If a security manager exists and its SecurityManager.checkRead(java.lang.String) method denies read access to the file
