[Java] findWithinHorizon metodo di Scanner

[peruzzo]

Non capisco come funziona findwithinhorizon...

import java.util.*;
import java.util.regex.Pattern;

public class Esempio {

	public static void main(String[] args) {
		String s = "Hello World! 3+3.0=6";
		// create a new scanner with the specified String Object
		Scanner scanner = new Scanner(s);
		// find a string of world, with horizon of 10
		System.out.println("" + scanner.findWithinHorizon("World", 10));
		// find a string of world, with horizon of 20
		System.out.println("" + scanner.findWithinHorizon("World", 20));
		// print the rest of the string
		System.out.println("" + scanner.nextLine());
		// close the scanner
		scanner.close();
	}
}

import java.util.Scanner;

public class Main {
  public static void main(String args[]) {
    Scanner sc = new Scanner("Name: Tom Age: 28 ID: 77");

    sc.findWithinHorizon("ID:",100);

    if (sc.hasNext())
      System.out.println(sc.next());
    else
      System.out.println("Error!");
  }
}