嗨，大家好！我是 Java 新手，目前正在學習字串。
如何從字串中洗掉多個單詞？
我會很高興任何提示。
class WordDeleterTest {
public static void main(String[] args) {
WordDeleter wordDeleter = new WordDeleter();
// Hello
System.out.println(wordDeleter.remove("Hello Java", new String[] { "Java" }));
// The Athens in
System.out.println(wordDeleter.remove("The Athens is in Greece", new String[] { "is", "Greece" }));
}
}
class WordDeleter {
public String remove(String phrase, String[] words) {
String[] array = phrase.split(" ");
String word = "";
String result = "";
for (int i = 0; i < words.length; i ) {
word = words[i];
}
for (String newWords : array) {
if (!newWords.equals(word)) {
result = newWords " ";
}
}
return result.trim();
}
}
Output:
Hello
The Athens is in Greece
我已經嘗試在這里使用替換，但是沒有用。
uj5u.com熱心網友回復：
程式員經常這樣做：
String sentence = "Hello Java World!";
sentence.replace("Java", "");
System.out.println(sentence);
=>你好Java世界
字串是不可變的，replace 函式回傳一個新的字串物件。所以改為寫
String sentence = "Hello Java World!";
sentence = sentence.replace("Java", "");
System.out.println(sentence);
=> 世界你好！
（空白仍然存在）
這樣，您的替換功能可能看起來像
public String remove(String phrase, String[] words) {
String result = phrase;
for (String word: words) {
result = result.replace(word, "").replace(" ", " ");
}
return result.trim();
}
uj5u.com熱心網友回復：
您可以使用流來做到這一點：
String phrase = ...;
List<String> wordsToRemove = ...;
String result = Arrays.stream(phrase.split("\s "))
.filter(w -> !wordsToRemove.contains(w))
.collect(Collectors.joining(" "));
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