This question already has answers here:
Java code To convert byte to Hexadecimal
(23 answers)
Closed 9 years ago.
I have a MAC address represented as a byte[] in Java and want it as a hexadecimal string, as they are usually represented. How can I do this with as easy as possible?
The byte array has length 6.
Try this:
String hexValue = String.format("%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
Related
This question already has answers here:
How to convert Java String into byte[]?
(9 answers)
Closed 5 years ago.
I have a string which represents an application (converted in bytes and then encoded in base64 -- if you ask yourself why, it is because i am transferring an application from a server to the client, in the hope of rebuilding it when transferred).
How would I get a Byte array back from this string?
String class has what you need (in java, a String is a class)
"this is a string".getBytes();
also take a look at this for base64 decoding of the String
org.apache.commons.codec.binary.Base64
java from 8 and beyond also has a base64 class built-in
java.util.Base64
This question already has answers here:
Java Serializable Object to Byte Array
(12 answers)
Closed 8 years ago.
I'm using a GoogleApiClient MessageApi method which accepts an arbitrary payload specified as a byte array.
For my payload I have some strings and a Bitmap that I want to transfer all together in one go.
What options are there available for packaging the strings and bitmaps and converting to a byte array?
A Bitmap can be converted to bytes through copyPixelsToBuffer. A string has getBytes.
This question already has answers here:
Print an integer in binary format in Java
(24 answers)
Closed 8 years ago.
Say I have an integer number: 11728322732
how can i convert it to a string according to its byte representation, i.e 11100011000000001100000111110001 (32 bits \ 4 bytes \ integer)
Thanks
Here it is:
Long.toBinaryString(11728322732L);
Actually, 11728322732 is not an Integer but a Long (because it is greater than Integer.MAX_VALUE). So if you really want to convert this long to a 32-bits int (can't figure why actually), you could do:
Integer.toBinaryString((int)11728322732L);
This question already has answers here:
Converting an int to a binary string representation in Java?
(19 answers)
Closed 9 years ago.
how can I get the binary value of a character
Ex: Letter C (ASCII Code= 067) To Binary value 01000011.
Use Integer.toBinaryString(character...);
This question already has answers here:
how to convert image to byte array in java? [duplicate]
(9 answers)
Closed 10 years ago.
AoA. Dear, i need function which can convert an image into binary to store in database and reverse conversion for this binary to image using java.
Use Base64 Class to convert it into String and then store in Database. You can convert it back into image whenever it is required.
http://developer.android.com/reference/android/util/Base64.html