package com.zzh.day2;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class demo1 {
public static void main(String[] args){
//匹配e_mail
System.out.println("adafdasfdasfdasfdsa@fdafdasf.com".matches("[\\w[.-]]+@[\\w[.-]]+\\.[\\w]+"));
Pattern pattern = Pattern.compile("\\d{3,5}");
String string = "123-343456-234-000";
Matcher matcher = pattern.matcher(string);
System.out.println("1 "+matcher.matches());//输出是否匹配
matcher.reset();
System.out.println("2 "+matcher.find()+" "+matcher.group()+" "+matcher.start()+" "+matcher.end());
System.out.println("3 "+matcher.find()+" "+matcher.group()+" "+matcher.start()+" "+matcher.end());
System.out.println("4 "+matcher.find()+" "+matcher.group()+" "+matcher.start()+" "+matcher.end());
System.out.println("5 "+matcher.find()+" "+matcher.group()+" "+matcher.start()+" "+matcher.end());
matcher.reset();
System.out.println("6 "+matcher.lookingAt());
System.out.println("7 "+matcher.lookingAt());
System.out.println("8 "+matcher.lookingAt());
System.out.println("9 "+matcher.lookingAt());
}
}
输出结果： true 1 false 2 true 123 0 3 3 true 34345 4 9 4 true 234 11 14 5 true 000 15 18 6 true 7 true 8 true 9 true
/* * matches() Attempts to match the entire region against the pattern. * 尝试匹配整个区域 * find(),true if, and only if, a subsequence of the input sequence matches this matcher’s pattern * 找到了可以匹配的字串 * lookingAt(),true if, and only if, a prefix of the input sequence matches this matcher’s pattern * 意义跟matches相同，但每次配都是从头开始 * reset()Resets this matcher. * 将匹配的位置重置为原始状态 * group()Returns the input subsequence matched by the previous match. * 如英文解释说的一样，好好英语，真的很重要 * start()Returns the start index of the previous match. * 某次成功匹配的起始位置，从0开始 * end()Returns the offset after the last character matched. * 某次成功匹配的结束位置 * */
