java中打印数组的5种方法

   Arrays.toString(arr)

		for(int n: arr)
		   System.out.println(n+", ");

		for (int i = 0; i < arr.length; i++) {
		   System.out.print(arr[i] + ", ");
		}

		System.out.println(Arrays.asList(arr));

		Arrays.asList(arr).stream().forEach(s -> System.out.println(s));//java8