Java基础语法-------DAY05

        int[] arr1 = {1,2,3,4,5,6};
        int[] arr2 = Arrays.copyOf(arr1, 8);
        System.out.println(Arrays.toString(arr2));


        int[] arr3 = new int[8];
                     //被复制的数组 从哪个位置开始复制 复制到的数组 从哪个位置开始粘贴 复制的长度 
        System.arraycopy(    arr1 ,      1          ,    arr3   ,         1      ,    2);
        System.out.println(Arrays.toString(arr3));

//普通for循环
        int[] arr1 = {1,2,3,4,5,6};
        for (int j = 0; j < i.length ; j++) {
            System.out.println(i[j]);
        }

    //高效for循环&foreach循环
        Integer[] arr2 = {1,2,3,4,5,6};
        for (Integer integer: arr2
             ) {
            System.out.println(integer);
        }

//嵌套for循环
for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                System.out.println(i+":"+j);
            }
        }

 for (int i = 0; i <= 3; i++) {
         for (int j = 0; j <= 1 ; j++) {
                if (i == 2){
                 continue;
                 System.out.println("hello");
              }
                System.out.println(i+""+j);
          }
     }

var arr1 = ["a",1,'q'];
var arr2 = new Array("hello","world");
var arr3 = new Array(3);