[Java知识库]java中list的遍历方式

list的遍历方式

list有五种遍历方式

 List<Person> personList = new ArrayList<>();
 personList.add(new Person("用户1","男"));
 personList.add(new Person("用户2","女"));

1. 普通for循环

for(int i = 0;i<personList.size();i++){
	Person p = personList.get(i);
	System.out.println(p.toString());
}

2. 增强型for循环

for(Person p : personList){
    System.out.println(p.toString());
}

3. 迭代器

Iterator<Person> iterator = personList.iterator();
while(iterator.hasNext()){
	Person p = iterator.next();
	System.out.println(p.toString());
}

4. lamda表达式

 personList.forEach(person -> {
   	 System.out.println(person);
});

5. list集合内置迭代器

ListIterator<Person> listIterator = personList.listIterator();
while(listIterator.hasNext()){
	System.out.println(listIterator.next());
}