如何使用 Java RegEx 匹配非空白等价物?
你可以使用元字符 "\S" 匹配非空白字符。
示例
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; 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(); String regex = "\S"; //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 characters (not spaces): "+count); } }
输出
Enter a String Hello how are you welcome to tutorialspoint Number of characters (not spaces): 37
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