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In the method, keep adding the length :)
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Question
How to get the size of file or directory
How to get the size of file or directory, The size of a directory should be the total size of all contained files? i know the method File.length will return the size of a file (but not of a directory).
for example:
one-a 52
one-b 60
one 112
three-a 24
three 24
two 0
test0 136
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Answers
Ajay-Singh: thank you very much, below is my code:
if (dir.isDirectory()){
File[] list = dir.listFiles();
long size=0;
for (int i = 0; i < list.length; i++)
size += list[i].length();
System.out.println(dir.get
}else{
long filesize = dir.length();
System.out.println(dir.get
}
My testing structure is Directory: test0; Sub-directory: one,two,three;
C:\>java SizeTest c:\test0
one-a.txt 303
one-b.txt 1087
one-c.txt 0
one 1390
three 0
two-a.txt 1041
two-b.txt 1049
two 1041
test0 0
the output is not correct, the size of Directory Test0 should not be 0
The question reqiure me edit the afterLast Method to print out the directory and file size, how to use recursive in the afterLast method?
Below is my code:
public class SizeList extends DirectoryTour{
public Object afterLast(File dir, Object info) {
if (dir.isDirectory()){
File[] list = dir.listFiles();
long size=0;
for (int i = 0; i < list.length; i++)
size += list[i].length();
System.out.println(dir.get
}else{
long filesize = dir.length();
System.out.println(dir.get
}
return info;
}
}
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by: Ajay-SinghPosted on 2007-04-01 at 06:42:03ID: 18831839
You can use this recursive function:
public long size(File file) {
if (file.isFile())
return file.length();
File[] list = file.listFiles();
if (null == list || list.length == 0)
return 0;
long size = 0;
for (int i = 0; i < list.length; i++)
size += size(list[i]);
return size;
}