在arraylist中查找与regex匹配

import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

ArrayList<String> arrayList = new ArrayList<>();
arrayList.add("apple");
arrayList.add("banana");
arrayList.add("orange");
arrayList.add("grape");

String regex = ".*a.*"; // 以"a"开头或包含"a"的字符串

ArrayList<String> matchedElements = new ArrayList<>();
Pattern pattern = Pattern.compile(regex);

for (String element : arrayList) {
    Matcher matcher = pattern.matcher(element);
    if (matcher.matches()) {
        matchedElements.add(element);
    }
}

System.out.println("匹配的元素：");
for (String matchedElement : matchedElements) {
    System.out.println(matchedElement);
}