make2.java

/*
Given 2 int arrays, a and b, return a new array length 2 containing, as much as will fit, the elements from a followed by the elements from b. The arrays may be any length, including 0, but there will be 2 or more elements available between the 2 arrays.

make2([4, 5], [1, 2, 3]) → [4, 5]
make2([4], [1, 2, 3]) → [4, 1]
make2([], [1, 2]) → [1, 2]
*/
public int[] make2(int[] a, int[] b) {
  int[] c = new int[2];
  if(a.length >= 2) {
    c[0] = a[0];
    c[1] = a[1];
  }
  else if(a.length < 1) {
    c = b;
  }
  else {
    c[0] = a[0];
    c[1] = b[0];
  }
  return c;
}