Is it possible to get specific bytes from a byte array in java?
I have a byte array:
byte[] abc = new byte[512];
and i want to have 3 different byte arrays from this array.
I tried abc.read(byte[], offset,length) but it works only if I give offset as 0, for any other value it throws an IndexOutOfbounds exception.
What am I doing wrong?
You can use Arrays.copyOfRange() for that.
Arrays.copyOfRange() is introduced in Java 1.6. If you have an older version it is internally using System.arraycopy(...). Here's how it is implemented:
public static <U> U[] copyOfRange(U[] original, int from, int to) {
Class<? extends U[]> newType = (Class<? extends U[]>) original.getClass();
int newLength = to - from;
if (newLength < 0) {
throw new IllegalArgumentException(from + " > " + to);
}
U[] copy = ((Object) newType == (Object)Object[].class)
? (U[]) new Object[newLength]
: (U[]) Array.newInstance(newType.getComponentType(), newLength);
System.arraycopy(original, from, copy, 0,
Math.min(original.length - from, newLength));
return copy;
}
Integer[] and assign the result to a String[] variable.) Arrays.copyOfRange(T[], int, int) returns T[]. You may be mixing it up with the other version that takes a Class argument.
