for循环

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/**
 * @author LeDao
 * @company
 * @create 2021-06-21 12:38
 */
public class Test {

    public static void main(String[] args) {
        int[] arr1 = new int[]{6, 5, 4, 3, 2, 1};
        int[] arr2 = new int[arr1.length];
        //复制
        for (int i = 0; i < arr1.length; i++) {
            arr2[i] = arr1[i];
        }
        //遍历
        for (int j : arr2) {
            System.out.print(j + " ");
        }
    }
}

System.ararycopy

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/**
 * @author LeDao
 * @company
 * @create 2021-06-21 12:38
 */
public class Test {

    public static void main(String[] args) {
        int[] arr1 = new int[]{6, 5, 4, 3, 2, 1};
        int[] arr2 = new int[arr1.length];
        //复制
        System.arraycopy(arr1, 0, arr2, 0, arr1.length);
        //遍历
        for (int j : arr2) {
            System.out.print(j + " ");
        }
    }
}

clone()

如果数组等长，而且对应copy，使用int[] B= A.clone()

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/**
 * @author LeDao
 * @company
 * @create 2021-06-21 12:38
 */
public class Test {

    public static void main(String[] args) {
        int[] arr1 = new int[]{6, 5, 4, 3, 2, 1};
        int[] arr2 = arr1.clone();
        //遍历
        for (int j : arr2) {
            System.out.print(j + " ");
        }
    }
}