Is there a simple way like one line of code to combine two arrays of double type into one array?
If there isn't, what would be the easiest way to do it?
Thanks
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5 Answers
You probably are looking for System.arrayCopy() method
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If you have liberty of using Apace commons this here is the solution.
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Can't recommend Google Guava library for this kind of thing
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Or you could write some like this:
public static double[] unite(double[]... arrays)
{
int length = 0;
for(double[] array: arrays)
length += array.length;
double[] united = new double[length];
int pos = 0;
for(double[] array: arrays) {
System.arraycopy(array, 0, united, pos, array.length);
pos += array.length;
}
return united;
}
public static void main(String... args) {
double[] d1 = {0.1, 0.2};
double[] d2 = {0.3, 0.4, 0.5};
double[] d3 = {0.6, 0.7, 0.8, 0.9};
double[] d4 = {};
double[] d5 = {1.0};
double[] united = unite(d1, d2, d3, d4, d5);
System.out.println(Arrays.toString(united));
}
