如何使用 Java RegEx 匹配空格等价物?
javaobject oriented programmingprogramming
元字符"\s"与给定字符串中的空格字符匹配。
示例 1
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("空格数:"+count);
}
}
输出
输入一个字符串 Hello how are you welcome to tutorialspoint 空格数:6
示例 2
import java.util.Scanner;
public class RegexExample {
public static void main( String args[] ) {
//正则表达式
String regex = "\s+";
System.out.println("输入输入值:");
Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
String result = input.replaceAll(regex, "");
System.out.println("结果:"+result);
}
}
输出
输入输入值: hello how are you 结果:hellohowareyou
