Java copy section of array [duplicate]

Question

Is there a method that will copy a section of an array(not arraylist) and make a new array from it?

Example: [1,2,3,4,5] 

and you create a new array from it:

[1,2,3] 

Are there any one line/methods that will do this?

Answer 1

See the method Arrays.copyOfRange

Answer 2

Here's a java 1.4 compatible 1.5-liner:

int[] array = { 1, 2, 3, 4, 5 }; int size = 3;  int[] part = new int[size]; System.arraycopy(array, 0, part, 0, size); 

You could do this in one line, but you wouldn't have a reference to the result.

To make a one-liner, you could refactor this into a method:

private static int[] partArray(int[] array, int size) {     int[] part = new int[size];     System.arraycopy(array, 0, part, 0, size);     return part; } 

then call like this:

int[] part = partArray(array, 3);