Renaming the file in java

Question

File file= new File("C:\\Documents and Settings\\Administrator\\Desktop\\ajay\\abc.csv"); Timestamp ts=new Timestamp(new Date().getTime()); String str= ts.toString(); String st="C:\\Documents and Settings\\Administrator\\Desktop\\ajay\\abc\\"+str+".csv"; System.out.println(new Date().getTime()); boolean b=file.renameTo(new File(st)); System.out.println(b);

In this code snippet I try to rename the file but I'm unable to find the error in it.

So are we all. What error do you get ? Have you tried using File.exists() and other methods to sanity check what your program is doing ? — Brian Agnew
– Brian Agnew, Commented Feb 1, 2011 at 10:49
please use code {} tag and also provide errors that you get when run this code. — mehdi shahdoost
– mehdi shahdoost, Commented Feb 1, 2011 at 10:49
The error is that the value of b is false which means the file has not been renamed. — tin_tin
– tin_tin, Commented Feb 1, 2011 at 10:52
Why are you (ab)using java.sql.Timestamp here? What's the functional requirement? You might have misunderstood its purpose. — BalusC
– BalusC, Commented Feb 1, 2011 at 10:59
The requirement is that i have to read a CSV file and rename it with a name which includes current time along with the original file name. For example if the name of original file is abc.csv then renamed file should be something like abc20110201.csv — tin_tin
– tin_tin, Commented Feb 2, 2011 at 5:54

mrbellek · Accepted Answer · 2011-02-01 10:51:15Z

4

Won't getTime().toString() return a string with colons in it? That would be illegal in a filename.

answered Feb 1, 2011 at 10:51

mrbellek

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3 Comments

tin_tin Over a year ago

Thnx. Can u suggest any way out??

Koen Weyn Over a year ago

String str = new SimpleDateFormat("HH_mm_ss").format(new Date()); would format your timestamp as 23_59_11

mrbellek Over a year ago

Yup. Either change the date format it returns, or manually replace illegal filename characters.

mehdi shahdoost · Accepted Answer · 2011-02-01 10:58:24Z

you can remove colon from String for example with this method :

 String time = "12:12:12"; String time2 = time.replace(":", "");

output be : 121212

flash · Accepted Answer · 2011-02-02 06:38:26Z

I would use something like

final File file= new File("C:\\Documents and Settings\\Administrator\\Desktop\\ajay\\abc.csv"); final Calendar cal = Calendar.getInstance(); cal.setTime(new Date()); final StringBuilder str = new StringBuilder(); str.append(cal.get(Calendar.YEAR)); str.append(cal.get(Calendar.MONTH)); str.append(cal.get(Calendar.DATE)); final String st="C:\\Documents and Settings\\Administrator\\Desktop\\ajay\\abc"+str+".csv"; System.out.println(new Date().getTime()); final boolean b = file.renameTo(new File(st)); System.out.println(b);

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