在 Java 中,Pattern CANON_EQ 字段和示例
Pattern 类的 CANON_EQ 字段仅在字符规范相等时匹配两个字符。当将此用作 compile() 方法的标志值时,当且仅当两个字符的完整规范分解相等时,它们才会匹配。
规范分解是 Unicode 文本规范形式之一。
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");
}
}
}
输出
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);
}
}
}
}
输出
? 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?
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