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);        }    }} |
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Demo.txt file:
Output:
