如何在这种类型的字符串中检测新行

Question

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

我想在运行时检测断线,当我点击按钮我想知道新线来..因为在TEXTVIEW我想输出相同像这样的字符串没有变化..所以告诉我一些想法或逻辑或源代码....

Answer 1

中没有新行或特殊的"断行"字符

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

该陈述完全等同于

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

当我点击按钮我想知道新线来..

您可以找到每个新线的位置yourText.indexOf("\n").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'));

我想通过隐形"\n"来拼写一些单词

没有"隐形\n".在源代码中,您必须使用\n或等效的东西.Java不支持heredoc或任何等效的东西.

要将字符串分成多行,您可以执行以下操作:

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.