How to copy an array in java

Copy of array

First type:

  把一个数组的值拷贝到另一个数组
 public static int[] copyArray(int[] array){
        int[] copy = new int[array.length];
        for (int i = 0; i <array.length ; i++) {
            copy[i] = array[i];
        }
        return copy;
    }
 
    public static void main(String[] args) {
        int[] array = {1,4,6,3,8,9};
        int[] ret = copyArray(array);
        System.out.println(Arrays.toString(ret));
 
 
    }

Print result:

Second type:

Copy array (self) function

Print result:

The length can also be multiplied by 2, but not in the original On the basis of expanding 2 times, here is a new object

Copy array (part) function:

All source codes in Java from and to are left-closed and right-open.

The third type:

Print result:

The fourth copy:

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