Java 正则表达式中子表达式“(?> re)”的解释
子表达式/元字符“(?> re)”匹配独立模式而不回溯。
示例
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class PatternExample { public static void main(String args[]) { //Reading String from user System.out.println("Enter a String"); Scanner sc = new Scanner(System.in); String input = sc.next(); String regex = "(?>[0-9])"; //Compiling the regular expression Pattern pattern = Pattern.compile(regex); //Retrieving the matcher object Matcher matcher = pattern.matcher(input); //verifying whether match occurred boolean bool = matcher.find(); if(bool) { System.out.print("Match found"); } else { System.out.print("Match not found"); } } }
输出
Enter a String 9848022338 Match found
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