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Java – How to convert a byte to a binary string

June 3, 2020 by mkyong

In Java, we can use Integer.toBinaryString(int) to convert a byte to a binary string representative. Review the Integer.toBinaryString(int) method signature, it takes an integer as argument and returns a String. Integer.java public final class Integer extends Number implements Comparable<Integer>, Constable, ConstantDesc { public static String toBinaryString(int i) { return toUnsignedString0(i, 1); } //… } If …

Java – How to join and split byte arrays, byte[]

May 10, 2020 by mkyong

In this example, we will show you how to join and split byte arrays with ByteBuffer and System.arraycopy. ByteBuffer public static byte[] joinByteArray(byte[] byte1, byte[] byte2) { return ByteBuffer.allocate(byte1.length + byte2.length) .put(byte1) .put(byte2) .array(); } public static void splitByteArray(byte[] input) { ByteBuffer bb = ByteBuffer.wrap(input); byte[] cipher = new byte[8]; byte[] nonce = new byte[4]; …