How do I convert Long to byte [] and back in java - Stack Overflow
From Java 9, the best approach is to use VarHandle, which will read from the byte array as if it is a long array, for performance make the VarHandle instance a static final field.
ByteArrayUtil | Android Open Source Project
Utilities to operate on byte array, e.g., convert bytes to integer. Java doesn't have an unsigned value type, so expansion is needed to convert an unsigned integer stored in 4 bytes to a long value, or unsigned short stored in 2 bytes to an integer value.
Convert Long to Byte Array in Java - javathinking.com
Converting a long to a byte array in Java is a fundamental operation in many low-level programming scenarios. Understanding the core concepts of endianness and the different conversion methods is essential for successful implementation.
Converting a Long to Byte Array and Appending it to Another Array in Java
Converting a long to a byte array in Java and adding it to another array can be achieved using different methods.
Convert byte[] to Byte[] and Vice Versa in Java | Baeldung
Learn several approaches to converting byte arrays to Byte arrays and vice versa in Java.
java - how do i convert byte array to long in android - Stack Overflow
I need to convert a byte[] of size 4 to type long for my Android app. I found a function byteArrayToLong(byte_array) which is in the java.io.Bits package, but it isn't working in my application.
java - Convert long to byte array and add it to another array - Stack ...
I am updating this post because I have just announced a pre-release version of a library that will convert longs to byte arrays (and back again). The library is very small and will convert any java primitive to a byte array.
Java Native Method to convert Long Array to Byte array
ByteBuffer.asLongBuffer().put() is the right way to copy between different array types. It's simple, pure Java and it's not that slow. I'll demonstrate below. Note that to make the results equivalent to memcpy, you need to switch ByteBuffer to the native byte order. By default, ByteBuffers are BIG_ENDIAN, while x86 architecture is LITTLE_ENDIAN.