java集合collection接口与子接口及实现类

//通过注解抑制编译警告
@SuppressWarnings({"all"})
public class CollectionMethodDemo {
    public static void main(String[] args) {
//        创建对象
        List arrList = new ArrayList();
//        使用add添加元素
        arrList.add("name");
        arrList.add(15);
    }

}

public class ArrayListTest {
    public static void main(String[] args) {
    Books book1 = new Books("三国演义",50);
    Books book2 = new Books("红楼梦",60);
    Books book3 = new Books("西游记",70);
    Books book4 = new Books("水浒传",80);
//    创建集合
        List list = new ArrayList<>();
//        添加元素
        list.add(book1);
        list.add(book2);
        list.add(book3);
        list.add(book4);
//        迭代器遍历集合
        Iterator iterator  = list.iterator();
        while (iterator.hasNext()){
            Object object = iterator.next();
            System.out.println(object);
        }
        System.out.println("======================");
//        增强for遍历
        for (Object b:list){
            System.out.println(b);
        }
    }
}
class Books{
    private String name;
    private int price;

    public Books() {
    }
    public Books(String name, int price) {
        this.name = name;
        this.price = price;
    }
    
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public int getPrice() {
        return price;
    }
    
    public void setPrice(int price) {
        this.price = price;
    }
    public String toString() {
        return "Books{name = " + name + ", price = " + price + "}";
    }
}