Change a file timestamp
Timestamp is a utility to change or modify the time
of a file. Java provides the facility for
changing a file timestamp according to the user reliability.
Description of program:
This program helps you in changing a file timestamp or
modification time in Java. After running this program it will take a file name
and its modification date in 'dd-mm-yyyy' format. Then it will check the
given file is exist or not using the exists() method. When the file
exists, this program will change the date of given file and it will display a
message "Modification is successfully!" otherwise it
will show "File does not exists!".
Description of code:
setLastModified(long time):
This is the method that sets the last modification time of a file or directory
and returns Boolean types values either 'true' or 'false'. If it
will return a 'true' only when the
modification is completely successfully otherwise, it will return 'false'. This
method takes following long type data:
time: This
is the time that have to be modified or set.
getTime():
This is the method that returns the number of milliseconds in GMT format
like: 23-04-2007.
Here is the code of program:
import java.io.*;
import java.util.*;
import java.text.*;
public class ChangeFileDate{
public static void main(String[] args) {
try{
System.out.println("Change file timestamp example!");
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter file name with extension:");
String str = bf.readLine();
System.out.println("Enter last modified date in 'dd-mm-yyyy' format:");
String strDate = bf.readLine();
SimpleDateFormat sdf= new SimpleDateFormat("dd-MM-yyyy");
Date date = sdf.parse(strDate);
File file = new File(str);
if (file.exists()){
file.setLastModified(date.getTime());
System.out.println("Modification is successfully!");
}
else{
System.out.println("File does not exists!");
}
}
catch(Exception e){
e.printStackTrace();
}
}
}
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Output of program:
C:\vinod\Math_package>javac ChangeFileDate.java
C:\vinod\Math_package>java ChangeFileDate
Change file timestamp example!
Enter file name with extension:
StrStartWith.shtml
Enter last modified date in 'dd-mm-yyyy' format:
23-04-2007
Modification is successfully! |
Download this example.
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