how to make multiple line string to single line string?

Question

I have below string

String str="select * from m_menus;

select * from m_roles";

I want above string in one line like

String str="select * from m_menus;select * from m_roles";

I have tried

str1=str.replace("[\r\n]+", " "); 

and also

str1=str.replace("\n"," "); 

Both are not working.

Answer 1

No regular expressions and operating system independent:

str1.replaceAll(System.lineSeparator(), " ");

Windows uses \r\n as a line breaker, while *nix systems use only \n.

Answer 2

Use String.replaceAll instead.

str1=str.replaceAll("[\r\n]+", " ");

Answer 3

If you want to use regex, you should use the String.replaceAll() method.

Answer 4

Why don't you use str.replaceAll("\r\n", " ") ?

Should work and replace all occurences.