java数组类Arrays：比较，填充，排序

		int i1[] = {1,2,3,4,5,6};
		int i2[] = {6,5,4,3,2,1};
		//排序
		Arrays.sort(i2);
		System.out.println(i1.equals( i2 ));
		System.out.println( Arrays.equals(i1, i2) );
		//将数组2的内容填充3
		Arrays.fill(i2, 3);
		System.out.println( Arrays.toString(i2) );