Posix文字クラス\p{InGreek}Java正規表現

このクラス\p{InGreek}はギリシャ文字と一致します。

例

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example1 {
   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();
      //Regular expression
      String regex = "\\p{InGreek}";
      //Compiling the regular expression
      Pattern pattern = Pattern.compile(regex);
      //Retrieving the matcher object
      Matcher matcher = pattern.matcher(input);
      int count = 0;
      while(matcher.find()) {
         count++;
      }
      System.out.println("Number of Greek characters: "+count);
   }
}

出力

Enter a string
sample text αγ ηθ ξψ
Number of Greek characters: 6

import java.util.Scanner;
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();
      //Regular expression
      String regex = "^.+\\p{InGreek}.+";
      boolean result = input.matches(regex);
      if(result) {
         System.out.println("Given string contains Greek characters");
      } else {
         System.out.println("Given string doesn’t contain Greek characters ");
      }
   }
}

Enter a string
sample text αγ
Given string contains Greek characters