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javastringhexascii

How can i put a string in one line

i'm doing some conversion, from Hex to Ascii, when i convert the string, i got the following example:

F23C040100C1

100D200000000000

0000

I know that the string is coming like this, because of the base 16, but i want too put it in just one line, like this:

F23C040100C1100D2000000000000000

How can i do that?

I have tried:

mensagem.replaceAll("\r\n", " ");
Solution

  • There are multiple problems you could be running into, so I'll cover all them in this answer.

    First, any methods on String which appear to modify it actually return a new instance of String. That means if you do this:

    String something = "Hello";
something.replaceAll("l", "");
System.out.println(something); //"Hello"

    You'll want to do

    something = something.replaceAll("l", "");

    Or in your case

    mensagem = mensagem.replaceAll("\r\n", " ");

    Secondly, there might not be any \r in the newline, but there is a \n, or vice versa. Because of that, you want to say that

    if \r exists, remove it. if \n exists, also remove it

    You can do so like this:

    mensagem = mensagem.replaceAll("\r*\n*", " ");

    The * operator in a regular expression says to match zero or more of the preceding symbol.