如何在Java上断开字符串？

Question

I need to write strings into ByteArrayOutputStream , but I need to write strings with breaking. I have tried to do it as example:

out.write("123".getBytes());
out.write("\n456".getBytes());

But '\\n' doesn't work. Please, tell me, how can I fix it? Or suggest me alternative OutputStream for storing strings (this OS must allow to use breaking of lines) without making files. Thank you.

Answer 1

ByteArrayOutputStream stream = ...;
PrintStream printer = new PrintStream(stream, true); // auto-flush
printer.println("123"); // writes newline
printer.print("hello"); // no new line
printer.print(" world");
printer.println();

Note that this will generate platform-specific bytes. Newlines can be \\n , \\r\\n or \\r . The actual character sequence used is specified in system property line.separator .

Answer 2

Just use BufferedWriter it will manage line breaks for you ( bwinstance.newLine() ). No matter on which OS you are running.

Answer 3

If you are looking for a system independent newline separator I would recommend using:

System.getProperty("line.separator");

Rather than calling getProperty() every time, I would also store this value in a properly accessible variable.

This is also the ideal method if you are constructing strings prior to writing them, since this way you will not have to write each line separately.