Arul Murugan
Posts: 7
Nickname: appaney
Registered: Mar, 2006
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Re: How to find size of a file (in terms of Bytes, KB, MB & GB..) using Java -
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Posted: Apr 4, 2006 1:32 PM
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Hi all, I wrote the code to find the size of the file.
This code actually find the content size of the file not the file size in the disk.
import java.io.File;
import java.util.*;
/***************************************************************** ******************************
* This program finds the actual content size of the file not the size of the file in the disk.
* Eg: Check the 1 Byte text file for its actual content size and the size of that same file in the
* disk.
******************************************************************************* ****************/
public class FindFileSize
{
double fileSizeKB;
public FindFileSize()
{
/**Specify the location and name of the file whose size is to be found **/
File f = new File("C:\\arulTest\\arul2.zip");
String fileLength = String.valueOf(f.length());
int fileLengthDigitCount = fileLength.length();
double fileLengthLong = f.length();
double decimalVal = 0.0;
String howBig = "";
System.out.println("fileLengthDigitCount is..."+fileLengthDigitCount);
if(f.length()>0)
{
if(fileLengthDigitCount < 5)
{
fileSizeKB = Math.abs(fileLengthLong);
howBig = "Byte(s)";
}
else if(fileLengthDigitCount >= 5 && fileLengthDigitCount <=6)
{
fileSizeKB = Math.abs((fileLengthLong/1024));
howBig = "KB";
}
else if(fileLengthDigitCount >= 7 && fileLengthDigitCount <= 9)
{
fileSizeKB = Math.abs(fileLengthLong/(1024*1024));
howBig = "MB";
}
else if(fileLengthDigitCount >9)
{
fileSizeKB = Math.abs((fileLengthLong/(1024*1024*1024)));
decimalVal = fileLengthLong%(1024*1024*1024);
howBig = "GB";
}
}
System.out.println("....bytes....."+fileSizeKB);
String finalResult = getRoundedValue(fileSizeKB);
System.out.println("\n....Final Result....."+finalResult+" "+howBig);
}
private String getRoundedValue(double decimalVal)
{
System.out.println("\nThe first call......."+decimalVal);
long beforeDecimalValue = decimalTokenize(decimalVal,1);
long afterDecimalValue = decimalTokenize(decimalVal,2);
long decimalValueLength = String.valueOf(afterDecimalValue).length();
long dividerVal = divider(decimalValueLength-1);
long dividedValue = afterDecimalValue/dividerVal;
String finalResult=String.valueOf(beforeDecimalValue)+"."+String.valueOf(dividedValue) ;
System.out.println("\nfinalResult......."+finalResult);
return finalResult;
}
private long divider(long argLength)
{
long varDivider=1;
for(int i=0;i<(argLength-1);i++)
{
varDivider=varDivider*10;
}
return varDivider;
}
private long decimalTokenize(double decimalVal,int position)
{
long returnDecimalVal=0;
String strDecimalVal="";
if(decimalVal >0)
strDecimalVal = String.valueOf(decimalVal);
if(strDecimalVal.length()>0)
{
StringTokenizer decimalToken = new StringTokenizer(strDecimalVal,".");
//System.out.print("\n String tokenized successfully"+decimalToken.countTokens());
//int count = decimalToken.countTokens();
if(position==1)
{
returnDecimalVal = Long.parseLong(decimalToken.nextToken());
}
else if(position==2)
{
decimalToken.nextToken();
returnDecimalVal = Long.parseLong(decimalToken.nextToken());
}
}
return returnDecimalVal;
}
/**
*
* @param args
*/
public static void main(String[] args)
{
FindFileSize findFileSize = new FindFileSize();
}
}
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