Thank you all for the fast help.
Now i tried like this. (I am not good in IT)
int[] a = { 1, 2, 25 };
int[] b = { 9, 18 };
int [] arraynew = new int [a.length + b.length];
for (int i=0; i < a.length ; i++)
{
for( int j=0; j < b.length; j++)
{
arraynew[i] = a[i] + b[i];
println(arraynew[i]);
}
}
Does someone have another hints?
Thank you all for your feedback.