[英]Remove multiple line breaks between string and replace with single line breaks in java
I have string我有字符串
String description = a
\n
\n
\n
\n
\n
b
I want to remove the line break to be just 1 line break.我想将换行符删除为仅 1 个换行符。 Remove more than 2 line break to be just 1 line break.删除超过 2 个换行符只是 1 个换行符。
I have tried this我试过这个
String descResult = description.replaceAll("([\n]){2,}", "");
but it doesn't work.但它不起作用。
In addition to new lines, you seem to be having surrounding spaces too, so you need to use a regex that optionally captures optional spaces too.除了新行之外,您似乎也有周围的空格,因此您需要使用一个正则表达式,它也可以选择捕获可选空格。 Try this Java code,试试这个 Java 代码,
String s = "a \n \n \n \n \n b";
System.out.println("Before: " + s);
System.out.println("After: " + s.replaceAll("( *\n *){2,}", "\n"));
Prints,印刷,
Before: a
b
After: a
b
试试吧,替换一定是\\n
String descResult = description.replaceAll("([\n]){2,}", "\n");
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