如何使用 Java RegEx 匹配非空白等價物?
你可以使用元字元 "\S" 匹配非空白字元。
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);
}
}輸出
Enter a String Hello how are you welcome to tutorialspoint Number of characters (not spaces): 37
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