ArrayList

List<String> a1 = new ArrayList<String>();
a1.add(ss);
//1.取出資料
for(int i = 0; i < list.size(); i++){
System.out.print(list.get(i) + " ");
}
//2.取出資料
Iterator iterator = list.iterator();
while(iterator.hasNext()) {
System.out.print(iterator.next() + " ");
}
//3.取出資料 for J2SE5
for(String s : list) {
System.out.print(s + " ");
}