Bag

java.lang.Object
- edu.princeton.cs.algs4.Bag<Item>

类型参数:

Item - the generic type of an item in this bag

所有已实现的接口:

java.lang.Iterable<Item>
```
public class Bag<Item>
extends java.lang.Object
implements java.lang.Iterable<Item>
```
The Bag class represents a bag (or multiset) of generic items. It supports insertion and iterating over the items in arbitrary order.
This implementation uses a singly linked list with a static nested class Node. See LinkedBag for the version from the textbook that uses a non-static nested class. See ResizingArrayBag for a version that uses a resizing array. The add, isEmpty, and size operations take constant time. Iteration takes time proportional to the number of items.
For additional documentation, see Section 1.3 of Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.

构造器概要

构造器
构造器说明

Bag()
Initializes an empty bag.

方法概要

修饰符和类型	方法	说明
`void`	`add(Item item)`	Adds the item to this bag.
`boolean`	`isEmpty()`	Returns true if this bag is empty.
`java.util.Iterator<Item>`	`iterator()`	Returns an iterator that iterates over the items in this bag in arbitrary order.
`static void`	`main(java.lang.String[] args)`	Unit tests the `Bag` data type.
`int`	`size()`	Returns the number of items in this bag.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 java.lang.Iterable
forEach, spliterator

- 构造器详细资料
  - Bag
```
public Bag()
```
    Initializes an empty bag.
- 方法详细资料
  - isEmpty
```
public boolean isEmpty()
```
    Returns true if this bag is empty.
    
    返回:
    
    true if this bag is empty; false otherwise
  - size
```
public int size()
```
    Returns the number of items in this bag.
    
    返回:
    
    the number of items in this bag
  - add
```
public void add(Item item)
```
    Adds the item to this bag.
    
    参数:
    
    item - the item to add to this bag
  - iterator
```
public java.util.Iterator<Item> iterator()
```
    Returns an iterator that iterates over the items in this bag in arbitrary order.
    
    指定者:
    
    iterator 在接口中 java.lang.Iterable<Item>
    
    返回:
    
    an iterator that iterates over the items in this bag in arbitrary order
  - main
```
public static void main(java.lang.String[] args)
```
    Unit tests the Bag data type.
    
    参数:
    
    args - the command-line arguments