Java from /从字符串中删除多个单词

String str = "This is a sample string";
String wordsToRemove = "is a";
String result = str.replaceAll("\\b(" + wordsToRemove + ")\\b", "");
System.out.println(result);

String str = "This is a sample string";
String[] wordsToRemove = {"is", "a"};
String[] words = str.split(" ");
StringBuilder sb = new StringBuilder();
for (String word : words) {
    if (!Arrays.asList(wordsToRemove).contains(word)) {
        sb.append(word).append(" ");
    }
}
String result = sb.toString().trim();
System.out.println(result);

String str = "This is a sample string";
String[] wordsToRemove = {"is", "a"};
for (String word : wordsToRemove) {
    str = str.replace(word, "");
}
String result = str.trim();
System.out.println(result);