此类\ p {IsLatin}匹配拉丁字符。
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(); //正则表达式 String regex = "\\p{IsLatin}"; //Compiling the 正则表达式 Pattern pattern = Pattern.compile(regex); //检索匹配器对象 Matcher matcher = pattern.matcher(input); int count = 0; while(matcher.find()) { count++; } System.out.println("Number of Latin characters: "+count); } }
输出结果
Enter a string cé dé há ó Number of Latin characters: 7
import java.util.Scanner; 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(); //正则表达式 String regex = "^.*\\p{IsLatin}.*"; boolean result = input.matches(regex); if(result) { System.out.println("Given string contains Latin characters"); } else { System.out.println("Given string does not contain Latin characters "); } } }
输出结果
Enter a string sample text y e Given string contains Latin characters