java new line replacement

Question

I am wondering about why I don\'t get the expected result with this one:

String t = \"1302248663033   

        

Answer 1

Strings are immutable. String operations like replaceAll don't modify the instance you call it with, they return new String instances. The solution is to assign the modified string to your original variable.

t = t.replaceAll("\n", "");

Answer 2

Yes, \n is special. It is an escape sequence that stands for a newline. You need to escape it in a string literal in order for it to be actually interpreted the way you want. Append a \ before the sequence so that it looks like this:

"\\n"

Now your program should look like this:

String t = "1302248663033   <script language='javascript'>nvieor\\ngnroeignrieogi</script>";
t = t.replaceAll("\\n", "");
System.out.println(t);

Of course if the string t is coming from somewhere rather than actually being typed by you into the program then you need only add the extra slash in your call to replaceAll()

Edited according to comments.