Java: Array replication

There are many ways to replicate an array in Java, and you can use loops to assign values to the copied effect, but Java has a way to replicate the array.

System.arraycopy (a,a_index,b,b_index,length);

Parameter description:

A: The name of the array source

A_index: Start copying from which subscript starts in the array source

B: The name of the destination array

B_index: The location of the received copied content inserted in the destination array

As an example:

    int [] A = {1,2,3};         int New int [3];        System.arraycopy (A,0, B,0, a.length);                  for (int i=0; i<b.length;i++) {            System.  out . println (B[i]);             }}

You can see that the output of the destination array is the same as the contents of the group source.

　　

Java: Array replication