Generic Type(java)

 

List list = new ArrayList();

list.add("something");
list.add(100);

for (int i = 0; i < list.size(); i++) {
String name = (String) list.get(i); //取出Integer时，运行时出现异常
System.out.println("name:" + name);
}

List<String>[] lsa = new List<String>[10]; // Not really allowed. 
Object o = lsa; 
Object[] oa = (Object[]) o; 
List<Integer> li = new ArrayList<Integer>(); 
li.add(new Integer(3)); 
oa[1] = li; // Unsound, but passes run time store check 
String s = lsa[1].get(0); // Run-time error: ClassCastException

 

• ListIterator  Iterator　　

http://blog.csdn.net/longshengguoji/article/details/41551491