In a file system, without reading the previous text we cannot directly access the specific index. Thus, Reading text from a file from the specific index is achieved by skipping all the previous characters of a specified index. To read text from an index n, we need to skip (n-1) bytes. Here, we will use FileInputStream class to read text from the file.
long skip(long n): Skips over and discards n bytes of data from the input stream.
Syntax:
public long skip(long n) throws IOException
Parameters: n — the number of bytes to be skipped.
Returns: The actual number of bytes skipped.
Throws: IOException
Java
// Java program to read text from file from a specified// index import java.io.FileInputStream; public class GFG { public static void main(String args[]) { try { // attach the file to FileInputStream FileInputStream fin = new FileInputStream( "C:\\Users\\ASPIRE\\Desktop\\java folder\\Demo.txt"); int i = 0; // discards 7 bytes of data from the input // stream. fin.skip(7); // read from the file System.out.print("Printing text from index 8: "); while ((i = fin.read()) != -1) { System.out.print((char)i); } fin.close(); } catch (Exception e) { System.out.println(e); } }} |
Demo.txt file:
Output:
