How to convert String to byte without changing?

Question

I need a solution to convert String to byte array without changing like this:

Input:

 String s=\"Test\";

Output:

String         


        

Answer 1

You should always make sure serialization and deserialization are using the same character set, this maps characters to byte sequences and vice versa. By default String.getBytes() and new String(bytes) uses the default character set which could be Locale specific.

Use the getBytes(Charset) overload

byte[] bytes = s.getBytes(Charset.forName("UTF-8"));

Use the new String(bytes, Charset) constructor

String andBackAgain = new String(bytes, Charset.forName("UTF-8"));

Also Java 7 added the java.nio.charset.StandardCharsets class, so you don't need to use dodgy String constants anymore

byte[] bytes = s.getBytes(StandardCharsets.UTF_8);
String andBackAgain = new String(bytes, StandardCharsets.UTF_8);