Collections.addAll

collections用法以及list 简单实例

Collection<Integer> collection = new ArrayList<Integer>(Arrays.asList(1,2,3,4,5));
	    Integer[] moreIntegers = {6,7,8,9};
	    collection.addAll(Arrays.asList(moreIntegers));
	    Collections.addAll(collection,11,12,13,14,15);
	    Collections.addAll(collection,moreIntegers);
	    
	    List<Integer> list3 = Arrays.asList(16,17,18);
	    list3.set(1, 99);
	    List<Integer> list4 = new ArrayList<Integer>();
	    list4.add(33);
	    list4.set(0, 99);
	    System.out.println(list4);   

[1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 6, 7, 8, 9]

[16, 99, 18]

[99]