Java.util.Scanner.findWithinHorizon(Pattern pattern,int horizon) 方法

package com.codingdict;

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

public class ScannerDemo {
   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 pattern of 2 letters before rld, with horizon of 10
      System.out.println("" + scanner.findWithinHorizon(Pattern.compile("..rld"), 10));

      // find a pattern of 2 letters before rld, with horizon of 20
      System.out.println("" + scanner.findWithinHorizon(Pattern.compile("..rld"), 20));

      // print the rest of the string
      System.out.println("" + scanner.nextLine());

      // close the scanner
      scanner.close();
   }
}