Java - New Line Character Issue

Question

I have a code like,

String str = \" \" ; 

while(  cond ) {

  str = str + \"\\n\" ;

}

Now, I don\'t know why at the time of printing, the out

Answer 1

Based on your sample, the only reason it would not show a new line character is that cond is never true and thus the while loop never runs...

Answer 2

Looks like you are trying to run the above code on Windows. Well the line separator or new line is different on Windows ( '\r\n' ) and Unix flavors ('\n').

So, instead of hard coding and using '\n' as new line. Try getting new line from the system like:

String newLine = System.getProperty("line.separator");
String str = " " ; 

while(  cond ) {

  str = str + newLine ;

}

Answer 3

If you really want \n, to get printed, do it like this.

String first = "C:/Mine/Java" + "\\n";
System.out.println(first);

OUTPUT is as follows :

For a good reference as to why is this happening, visit JAVA Tutorials

As referred in that TUTORIAL : A character preceded by a backslash is an escape sequence, and has a special meaning to the compiler. When an escape sequence is encountered in a print statement, the compiler interprets it accordingly

Hope this might help.

Regards

Answer 4

The newline character is considered a control character, which doesn't print a special character to the screen by default.

As an example, try this:

String str = "Hi";
while (cond) {
    str += "\n"; // Syntactically equivalent to your code
}
str += "Bye";
System.out.println(str);