两个double数组的结合

两个double数组的组合
public static double[] appendDouble(double[] a, double[] b) {
double[] result = new double[a.length + b.length];
System.arraycopy(a, 0, result, 0, a.length);
System.arraycopy(b, 0, result, a.length, b.length);
return result;
}