for (int i = 0; i < list.size(); i++)){

	String temp = (String)list.get(i);

	System.out.println(temp);

}

for (String temp: list) {

	System.out.println(temp);

}

for (Iterator it = list.iterator(); it.hasNext();) {

	String temp = (String)it.next();

	System.out.println(temp);

}

Iterator it = list.iterator();

while(it.hasNext()) {

	Object obj = it.next();

	it.remove(); // 如果遍历时要删除集合中的元素

	System.out.println(obj);

}

for (String temp: set) {

	System.out.println(temp);

}

for (Iterator<String> it = set.iterator(); it.hasNext();) {

	String temp = (String)it.next();

	System.out.println(temp);

}

Set<Integer> s2 = map1.keySet();

for (Iterator<Integer> it = s2.iterator(); it.hasNext();) {

	Integer temp = it.next();

	System.out.println(temp + " " + map1.get(temp));

}

Set<Entry<Integer, String>> s1 = map1.entrySet();

for (Iterator<Entry<Integer, String>> it = s1.iterator(); it.hasNext();) {

	Entry<Integer, String> temp = it.next();

	System.out.println(temp.getKey() + " " + temp.getValue());

}