Java中的正则表达式“ \ G”元字符
子表达式/元字符“\G”与最后一个匹配结束的点匹配。
示例
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexExample {
public static void main( String args[] ) {
String regex = "\\G[0-9]";
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string: ");
String input = sc.nextLine();
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
int count = 0;
String digits = "";
System.out.println("上一场比赛的数字：");
while(m.find()) {
System.out.print(m.group());
count ++;
}
System.out.println();
System.out.println("Number of matches: "+count);
}
}输出结果
Enter a string: 555 sample text 上一场比赛的数字： 555 Number of matches: 3