使用正则表达式拆分java字符串，然后存储到堆栈中

import java.util.regex.*;

public class Main {
    public static void main(String[] args) {
        String input = "Hello,World!This,is,a,test";
        String pattern = "[,!]";
        
        Pattern regex = Pattern.compile(pattern);
        Matcher matcher = regex.matcher(input);
        
        Stack<String> stack = new Stack<>();
        
        int startIndex = 0;
        while (matcher.find()) {
            String substring = input.substring(startIndex, matcher.start());
            stack.push(substring);
            startIndex = matcher.end();
        }
        
        // 处理最后一个分隔符之后的字符串
        String lastSubstring = input.substring(startIndex);
        stack.push(lastSubstring);
        
        // 打印结果
        while (!stack.isEmpty()) {
            System.out.println(stack.pop());
        }
    }
}