how to convert Byte[] to byte[]

Question

I have a problem: I use byte[] to store data, but I have to connect several byte[] togather, I know Arrays.addAll(Arrays.asList(Byte[])) will do the thing, but how to convert byte[] to Byte[], and how to revert Byte[] to byte[]?

Please show us what you've tried so far, by [edit]ing your question. Also please convey any research that you have done. — Jonny Henly, Aug 05 '16 at 03:07
And also tell us what the results were. For example, "I tried this but it gave me this compile error: " or "I tried this and passed in [1, 2] but I got out [0]." — Robert Columbia, Aug 05 '16 at 03:09
If I were you, I'd just do it by brute force--declare your own `byte[]` whose length is the total length, and use loops to copy the data. Java doesn't always do a good job with arrays of primitive types, and some newer Java 8 features that could help you with some primitive types aren't defined for `byte`. — ajb, Aug 05 '16 at 03:28

score 0 · Answer 1 · answered Aug 05 '16 at 04:48

Convert Byte to byte

 public class convertByteTobyte {
   public static void main(String[] args) {
    Byte[] Byte = new Byte[50];
    System.out.println("Byte length is:" + Byte.length);
    byte[] b = new byte[Byte.length];
    for (int i = 0; i < Byte.length; i++) {
        b[i] = Byte[i];
    }
    System.out.println("byte length is:" + b.length);
}
}

Convert byte to Byte

public class ConvertbyteToByte {
public static void main(String[] args) {
    byte[] b = new byte[50];
    System.out.println("byte length is:" + b.length);
    Byte[] Byte = new Byte[b.length];
    for (int i = 0; i < b.length; i++) {
        Byte[i] = b[i];
    }
    System.out.println("Byte length is:" + Byte.length);
}
}

how to convert Byte[] to byte[]

1 Answers1