如何在這種類型的字符串中檢測新行

Question

String quote = "Now is the time for all good "+
               "men to come to the aid of their country.";

我想在運行時檢測斷線，當我點擊按鈕我想知道新線來..因為在TEXTVIEW我想輸出相同像這樣的字符串沒什么變化..所以告訴我一些想法或邏輯或源代碼....

Answer 1

中沒有新行或特殊的“斷行”字符

String quote = "Now is the time for all good "+
               "men to come to the aid of their country.";

該陳述完全等同於

String quote = "Now is the time for all good men to come to the aid of their country.";

當我點擊按鈕我想知道新線來..

您可以通過執行yourText.indexOf("\\n")來找出每個換行符的位置。 例如，下面的片段打印29。

String quote = "Now is the time for all good \n" +
               "men to come to the aid of their country.";

System.out.println(quote.indexOf('\n'));

我想通過隱形“\\ n”來拼寫一些單詞

沒有“隱形\\n ”。 在源代碼中，您必須使用\\n或等效的東西。 Java不支持heredoc或任何等效的東西。

要將字符串分成多行，您可以執行以下操作：

String quote = "Now is the time for all good " +
               "men to come to the aid of their country.";

quote = quote.substring(0, 29) + "\n" + quote.substring(29);

System.out.println(quote);

打印：

Now is the time for all good 
men to come to the aid of their country.

Answer 2

'\\ n'字符指定換行符。

"Now is the time for all good\nmen to come to the aid of their country."

如果您的GUI在此之前突破了界限，則需要以某種方式禁用自動換行。