java 正则表达式的使用超级简单

2019-11-08 19:32:23

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package test;import java.util.regex.Matcher;import java.util.regex.Pattern;public class Parren {public static void main(String[] args){int i = 9;Pattern pattern = Pattern.compile("^[1][3-8]//d{"+i+"}$");Matcher matcher = pattern.matcher("13565765432"); if(!matcher.matches()){ System.out.PRintln("matcher 失敗"); }else{ System.out.println("matcher 成功"); } int n = 1; Pattern pattern2 = Pattern.compile("^//d{1}$"); //Pattern pattern2 = Pattern.compile("^[1]$"); Matcher matcher2 = pattern2.matcher("3"); if(!matcher2.matches()){ System.out.println("matcher2 失敗"); }else{ System.out.println("matcher2 成功"); }}}

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