如何使用 Java RegEx 匹配非空白等效项?
javaobject oriented programmingprogramming
您可以使用元字符"\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[]) {
//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
输入字符串 Hello how are you welcome to tutorialspoint Number of characters (not spaces): 37
