如何使用Java RegEx匹配特定字符串/行的结尾
元字符“$”匹配特定字符串的末尾,即它匹配字符串的最后一个字符。例如,
表达式“\\d$”与以数字结尾的字符串/行匹配。
表达式“[az]$”匹配以小写字母结尾的字符串/行。
例子1
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String args[]) { //从用户读取字符串 System.out.println("Enter a String"); Scanner sc = new Scanner(System.in); String input = sc.nextLine(); String regex = ".*[^a-zA-Z0-9//s]$"; //编译正则表达式 Pattern pattern = Pattern.compile(regex); //检索匹配器对象 Matcher matcher = pattern.matcher(input); if(matcher.matches()) { System.out.println("Match occurred"); } else { System.out.println("Match not occurred"); } } }
输出1
Enter a String this is sample text# Match occurred
输出2
Enter a String hello how are you Match not occurred
例子2
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample { public static void main( String args[] ) { String regex = "\\.$"; Scanner sc = new Scanner(System.in); System.out.println("Enter 5 input strings: "); String input[] = new String[5]; for (int i=0; i<5; i++) { input[i] = sc.nextLine(); } //创建一个Pattern对象 Pattern p = Pattern.compile(regex); for(int i=0; i<5;i++) { //创建一个Matcher对象 Matcher m = p.matcher(input[i]); if(m.find()) { System.out.println("String "+i+" ends with '.'"); } } } }
输出结果
Enter 5 input strings: hello how are you. where do you live what is your name. welcome to nhooo The Biggest Online Tutorials Library. String 0 ends with '.' String 2 ends with '.' String 4 ends with '.'