在 Java 中,Pattern CANON_EQ 欄位和示例


Pattern 類的 CANON_EQ 欄位僅在字元規範相等時匹配兩個字元。當將此用作 compile() 方法的標誌值時,當且僅當兩個字元的完整規範分解相等時,它們才會匹配。

規範分解是 Unicode 文字規範形式之一。

示例 1

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class CANON_EQ_Example {
   public static void main( String args[] ) {
      String regex = "b\u0307";
      //Compiling the regular expression
      Pattern pattern = Pattern.compile(regex, Pattern.CANON_EQ);
      //Retrieving the matcher object
      Matcher matcher = pattern.matcher("\u1E03");
      if(matcher.matches()) {
         System.out.println("Match found");
      } else {
         System.out.println("Match not found");
      }
   }
}

輸出

Match found 

示例 2

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class CANON_EQ_Example {
   public static void main( String args[] ) {
      String regex = "a\u030A";
      //Compiling the regular expression
      Pattern pattern = Pattern.compile(regex, Pattern.CANON_EQ);
      //Retrieving the matcher object
      String [] input = {"\u00E5", "a\u0311", "a\u0325", "a\u030A", "a\u1E03", "a\uFB03" };
      for (String ele : input) {
         Matcher matcher = pattern.matcher(ele);
         if(matcher.matches()) {
            System.out.println(ele+" is a match for "+regex);
         } else {
            System.out.println(ele+" is not a match for "+regex);
         }
      }
   }
}

輸出

? is a match for a?
a? is not a match for a?
a? is not a match for a?
a? is a match for a?
a? is not a match for a?
a? is not a match for a?

更新時間:06-Dec-2023

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