如何使用Java RegEx匹配等效的非空格？
您可以使用元字符“\\S”来匹配非空格字符。
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[]) {
//从用户读取字符串
System.out.println("Enter a String");
Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
String regex = "\\S";
//编译正则表达式
Pattern pattern = Pattern.compile(regex);
//检索匹配器对象
Matcher matcher = pattern.matcher(input);
int count = 0;
while(matcher.find()) {
count++;
}
System.out.println("Number of characters (not spaces): "+count);
}
}输出结果
Enter a String Hello how are you welcome to nhooo Number of characters (not spaces): 37