数组转化为List——List转化为数组

阅读更多

List keys = new ArrayList();
for (int i = 0; i < 5; i++) {
	keys.add(i);
	keys.add(i);
}
//List转化为数组
Integer[] arrays = (keys.toArray(new Integer[0]));
for(Integer a : arrays){
	System.out.println("-array-"+a);
}

//数组转化为List
List list = Arrays.asList(arrays);
for(Integer l : list){
	System.out.println("-list-"+l);
}