hi friend,

Try the following code may, this will be helpful for you

package net.roseindia;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

public class CreateBackupFile{
    public void createBackup(String filename, String... content)
                        throws IOException{
        File originalFile = new File(filename);     
        File backupFile = new File(originalFile.getCanonicalPath() + ".backup");

        originalFile.renameTo(backupFile);
        PrintWriter output = new PrintWriter(originalFile);
        for(String fileData : content){
            output.println(fileData);
        }
        output.close();
    }

    public static void main(String args[])
    {
        CreateBackupFile create = new CreateBackupFile();
        String fileName = "C:\\Documents and Settings\\bharat\\Desktop\\bipul\\New Folder\\TableExample.java";
        File file = new File(fileName);
        BufferedReader br = null;
        String str ="";     

        try {
            br = new BufferedReader(new FileReader(file));
            StringBuilder sb = new StringBuilder();
            while ((str = br.readLine()) != null) {
                sb.append(str);
            }
            br.close();
            String str1 = sb.toString();            
            create.createBackup(fileName, str1);
            System.out.println(str1);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

Thanks.

thanks, very nice code.