list <String> lists = new ArryList<String>();
lists.add("nihao");
lists.add("shijie";
lists.add("zhongwen");
//增强for循环
for(String s:lists){
String value = s;
}
//for循环
for (int i = 0;i<lists.size();i++){
String value = lists.get(i);
}
//iterator迭代器
Iterator<String> iter = lists.iterator();
while(iter.hashNext()){
String value = iter.next();
}
Map<String,String> maps = new HashMap();
map.put("1","1");
map.put("2","2");
map.put("3","3");
//迭代器
Iterator<String> iter = map.keySet().iterator();
while(iter.hashNext()){
String key = iter.next();
String value = map.get(key);
}
//for循环
Set<String> setkey = map.keySet();
for(int i = 0;i<setkey.size();i++){
String value = map.get(setkey.get(i));
}
//增强for循环
Set<String> setkey = map.keySet();
for(String k:setkey){
String value = map.get(k);
}