Concatenating two int[]
You can use IntStream.concat in concert with Arrays.stream to get this thing done without any auto-boxing or unboxing. Here's how it looks.
int[] result = IntStream.concat(Arrays.stream(c), Arrays.stream(d)).toArray();Note that Arrays.stream(c) returns an IntStream, which is then concatenated with the other IntStream before collected into an array.
Here's the output.
[1, 34, 3, 1, 5]
You can simply concatenate primitive(int) streams using IntStream.concat as:
int[] m = IntStream.concat(IntStream.of(c), IntStream.of(d)).toArray();
Use for loops, to avoid using toArray().
int[] e = new int[c.length+d.length];int eIndex = 0;for (int index = 0; index < c.length; index++){ e[eIndex] = c[index]; eIndex++;}for (int index = 0; index < d.length; index++){ e[eIndex] = d[index]; eIndex++;}