FindFIRSTusingFile.java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;

public class FindFIRSTusingFile {

	public static void main(String[] args) {
		try
		{
			boolean create=true;
			Scanner KB=new Scanner(System.in);

			System.out.print("Enter Source File Name:");
			String sfilename=KB.next();
			File srcfile=new File(sfilename);
			if(!srcfile.exists())
			{
				System.out.println("File Not Found..");
			}
			else
			{
				FileInputStream FI=new FileInputStream(sfilename);
				System.out.print("Enter Target File Name:");
				String tfilename=KB.next();
				File tfile=new File(tfilename);
				if(tfile.exists())
				{  
					System.out.print("File Already Exist OverWrite it..Yes/No?:");
					String confirm=KB.next();
					if(confirm.equalsIgnoreCase("yes"))
					{ 
						create=true;
					}
					else 
					{
						create=false;  
					} 
				}  
				if(create)
				{
					FileOutputStream FO=new FileOutputStream(tfilename);
					int b;
					/*while((b=FI.read())!=-1)
					{ if (b) {
						
					}

						FO.write(b);
					}*/
					//read content and write in another file
					while((b=FI.read())!=-1)
					{ 
						FO.write(b);
					}
					System.out.println("\nFIRST of the given grammer is Copied in File.");
				}
				FI.close();
			}
		}
		catch(IOException e)
		{
			System.out.println(e);
		}
	}
}