檢查字符串是否包含列表中的任何字符串

Question

我對 java 很陌生，目前卡住了，不知道如何繼續。

我想要做的是檢查一個字符串是否包含單詞列表中的任何單詞，如果是 output 它們。

在我的情況下，所有字符串都將具有類似的文本（例如 5 分鍾）：

Set timer to five minutes

或者這個：

Timer five minutes

這是我當前的代碼，帶有一些我想要做的評論：

import java.util.stream.Stream; 

class GFG { 

// Driver code 
public static void main(String[] args) 
{ 

String example = Set timer to five minutes

    Stream<String> stream = Stream.of(("Timer", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten") //The stream/array would be much bigger since I want to cover every number till 200 

//Now I thought I can use stream filter to check if example contains the word Timer and any of the words of the Stream and if it does I want to use the output to trigger something else

    if(stream.filter(example -> example .contains(NOTSUREWHATTOPUTHERE))) {
       //If detected that String contains Timer and Number, then create timer 
    } 
} 

誰能給我一些建議/幫助？

問候

Answer 1

你可以這樣做：

String[] words = { "Timer", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten" };

String example = "Set timer to five minutes";

String exLower = example.toLowerCase();
if (Stream.of(words).anyMatch(word -> exLower.contains(word.toLowerCase()))) {
    //
}

該代碼至少會正確檢查，即使單詞具有不同的大寫/小寫，但如果文本中嵌入了另一個單詞，則它會失敗，例如文本"stone"將匹配，因為找到"one" 。

要解決這個問題，“最簡單”的方法是將單詞列表轉換為正則表達式。

String[] words = { "Timer", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten" };

String example = "Set timer to five minutes";

String regex = Stream.of(words).map(Pattern::quote)
        .collect(Collectors.joining("|", "(?i)\\b(?:", ")\\b"));
if (Pattern.compile(regex).matcher(example).find()) {
    //
}

Answer 2

正確的應該是

String example = "Set timer to five minutes";
Stream<String> stream = Stream.of("Timer", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten");
if (stream.anyMatch(something -> example.contains(something))) {

}

您應該為 lambda 變量指定一個不同於example的名稱，因為這與已經存在的局部變量沖突。
此外，您可以/應該使用anyMatch而不是filter + 檢查長度。

要不就：

if (stream.anyMatch(example::contains)) {