code: import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileReader;
  import java.io.FileWriter;
  
  public class RemoveLines
  {
  	public static void main(String[] args)
  	{
  		//Enter name of the file here
  		String filename="foobar.txt";
  		//Enter starting line here
  		int startline=1;
  		//Enter number of lines here.
  		int numlines=2;
  		
  		RemoveLines now=new RemoveLines();
  		now.delete(filename,startline,numlines);
  	}
  	void delete(String filename, int startline, int numlines)
  	{
  		try
  		{
  			BufferedReader br=new BufferedReader(new FileReader(filename));
  			
  			//String buffer to store contents of the file
  			StringBuffer sb=new StringBuffer("");
  			
  			//Keep track of the line number
  			int linenumber=1;
  			String line;
  			
  			while((line=br.readLine())!=null)
  			{
  				//Store each valid line in the string buffer
  				if(linenumber<startline||linenumber>=startline+numlines)
  					sb.append(line+"\n");
  				linenumber++;
  			}
  			if(startline+numlines>linenumber)
  				System.out.println("End of file reached.");
  			br.close();
  			
  			FileWriter fw=new FileWriter(new File(filename));
  			//Write entire string buffer into the file
  			fw.write(sb.toString());
  			fw.close();
  		}
  		catch (Exception e)
  		{
  			System.out.println("Something went horribly wrong: "+e.getMessage());
  		}
  	}
  }
  