Best way to copy from one array to another

Question

When I run the following code  nothing gets copied - what am I doing wrong   Also  is this the best most efficient way to copy data from one array to another   public class A       public static void main String args              int a       1  2  3  4  5  6            int b     new int a length            for  int i   0  i  lt  a length  i                  a i    b i

User · Accepted Answer

I think your assignment is backwards   a i    b i    should be   b i    a i

User · Answer

Use Arrays copyOf my friend

User · Answer

There are lots of solutions  b   Arrays copyOf a  a length    Which allocates a new array  copies over the elements of a  and returns the new array  Or b   new int a length   System arraycopy a  0  b  0  b length    Which copies the source array content into a destination array that you allocate yourself  Or b   a clone     which works very much like Arrays copyOf    See this thread  Or the one you posted  if you reverse the direction of the assignment in the loop  b i    a i      NOT a i    b i

[java] Best way to copy from one array to another

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