How to copy files from one folder to another based on lastmodified date

hi

import java.io.*;

public class CopyFile{
private static void copyfile(String srFile, String dtFile){
try{
File f1 = new File(srFile);

File f2 = new File(dtFile);

InputStream in = new FileInputStream(f1);
//For Append the file.
// OutputStream out = new FileOutputStream(f2,true);

//For Overwrite the file.
OutputStream out = new FileOutputStream(f2);


byte[] buf = new byte[1024];

int len;

while ((len = in.read(buf)) > 0){

out.write(buf, 0, len);

}

in.close();

out.close();

System.out.println("File copied.");

}

catch(FileNotFoundException ex){
System.out.println(ex.getMessage() + " in the specified directory.");

System.exit(0);

}

catch(IOException e){

System.out.println(e.getMessage());

}

}

public static void main(String[] args){

switch(args.length){

case 0: System.out.println("File has not mentioned.");

System.exit(0);

case 1: System.out.println("Destination file has not mentioned.");

System.exit(0);

case 2: copyfile(args[0],args[1]);

System.exit(0);

default : System.out.println("Multiple files are not allow.");

System.exit(0);

}

}

}

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