这里提供3中方法来遍历集合
先创建一个集合arrayList
ArrayList arrayList = new ArrayList();
arrayList.add("java");
arrayList.add("php");
arrayList.add("html");
- for循环
for (int i = 0; i < arrayList.size(); i++) {
System.out.println(arrayList.get(i));
}
- 增强for循环(for each)
for (Object object : arrayList) {
System.out.println(object);
}
- 迭代器
Iterator iterator = arrayList.iterator();
while (iterator.hasNext()) {
Object object = (Object) iterator.next();
System.out.println(object.toString());
}