如何用 Java RegEx 匹配特定字串/行末尾
元字元“$”與特定字串的末尾匹配,即與字串的最後一個字元匹配。例如,
表示式“\d$”與以數字結尾的字串/行匹配。
表示式“[a-z]$”與以小寫字母結尾的字串/行匹配。
示例 1
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String args[]) { //Reading String from user System.out.println("Enter a String"); Scanner sc = new Scanner(System.in); String input = sc.nextLine(); String regex = ".*[^a-zA-Z0-9//s]$"; //Compiling the regular expression Pattern pattern = Pattern.compile(regex); //Retrieving the matcher object Matcher matcher = pattern.matcher(input); if(matcher.matches()) { System.out.println("Match occurred"); } else { System.out.println("Match not occurred"); } } }
輸出 1
Enter a String this is sample text# Match occurred
輸出 2
Enter a String hello how are you Match not occurred
示例 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(); } //Creating a Pattern object Pattern p = Pattern.compile(regex); for(int i=0; i<5;i++) { //Creating a Matcher object Matcher m = p.matcher(input[i]); if(m.find()) { System.out.println("String "+i+" ends with '.'"); } } } }
輸出
Enter 5 input strings: hello how are you. where do you live what is your name. welcome to tutorialspoint The Biggest Online Tutorials Library. String 0 ends with '.' String 2 ends with '.' String 4 ends with '.'
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