Java: Str_replace a character with a new line "\n"

Question

Here's the code:

String text = "hello, my name, is john smith.";

How do I make it into:

String text = "hello\n my name\n is john smith.";

Thanks!

Solution 1

text = text.replace(',', '\n');

Solution 2

With the replaceAll method:

text.replaceAll(",","\n");

Solution 3

Use this:

text = text.replace(", ", "\n");

NB: The first parameter is a comma followed by a space. It will replace the comma and the space following it with a new line. It looks much nicer this way, unless you wanted the spaces in the beginning.

Comments

[Keppil]

You get the +1 for using replace() instead of replaceAll(), and reassigning to the text variable.

[user2421111]

Why do I get an error using speechmarks "", but it works using ' apostrophes? And it works, thank you. And why is replace better?

[user2421111]

On all the solutions people give me, why does it say: No suitable method found for replace(java.land.String,char) method java.lang........ is not applicable;

[Djon]

You probably tried replace(",",'\n') which is wrong.

[Ravi K Thapliyal]

@user2421111 call replace with single quotes to denote you're passing a character like replace(',', '\n')

[Ravi K Thapliyal]

@Keppil I up voted for the same. :)

[Keppil]

@user2421111: replaceAll() uses regular expressions, which is unnecessary here, replace() does not.

[user2421111]

So, it seems to only work with " if I use String, ' for character? Am I right? Please confirm and say my username.

[Ravi K Thapliyal]

@user2421111 replace() is better because you just want to replace a character. replaceAll() would unnecessarily try to compile a regex out of your first parameter.

[user2421111]

Why do I have to use a speechmark?

[Djon]

@user2421111 Yes, '' delimits a char and "" a String, read this docs.oracle.com/javase/7/docs/api/java/lang/…

[Kazenga]

method replace want characters for input and with "," symbols you put string so if you want to write character you must use ','

[Steve P.]

You have to use "" because this you need to pass ", " as a String, since it can't be represented by a single character. There isn't a replace that takes a char and String, so you must also past the newline character as a String "\n"