Posix 字符类 \p{Alnum} 匹配
描述
字符类 \p{Alnum} 匹配任何字母数字字符。
示例
以下示例展示了 Posix 字符类匹配的用法。
package com.tutorialspoint; import java.util.regex.Matcher; import java.util.regex.Pattern; public class PosixCharacterClassDemo { private static final String REGEX = "\\p{Alnum}"; private static final String INPUT = "Bb12\tc"; public static void main(String[] args) { // create a pattern Pattern pattern = Pattern.compile(REGEX); // get a matcher object Matcher matcher = pattern.matcher(INPUT); while(matcher.find()) { //Prints the start index of the match. System.out.println("Match String start(): "+matcher.start()); } } }
让我们编译并运行上面的程序,这将产生以下结果 −
Match String start(): 0 Match String start(): 1 Match String start(): 2 Match String start(): 3 Match String start(): 5