Java中的正则表达式“ \ S”元字符
子表达式/元字符“\S”与非空格字符匹配。
例子1
import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample { public static void main( String args[] ) { String regex = "\\S"; String input = "您好,欢迎来到Nhooo!"; Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; } System.out.println("Number of matches: "+count); } }
输出结果
Number of matches: 38
例子2
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main( String args[] ) { String regex = "\\S"; Scanner sc = new Scanner(System.in); System.out.println("Enter 5 input strings: "); String input[] = new String[5]; for (int i=0; i<5; i++) { input[i] = sc.nextLine(); } //创建一个Pattern对象 Pattern p = Pattern.compile(regex); System.out.println("Number of characters in each string w/o spaces: "); for(int i=0; i<5;i++) { //创建一个Matcher对象 Matcher m = p.matcher(input[i]); int count = 0; while(m.find()) { count++; } System.out.println("String "+i+": "+count); } } }
输出结果
Enter 5 input strings: sample123 test data test *123 ab bc cd de hello how are you welcome to Nhooo Number of characters in each string w/o spaces: String 0: 9 String 1: 8 String 2: 8 String 3: 8 String 4: 37