Java 无法解析原始类型/T

我开始使用Java泛型，但似乎缺少一个关键组件

首先，我阅读了一些关于需要参数的原始类型的内容，并意识到由于它们是泛型的，所以没什么可做的，但我的问题是

BagInterface

和

LinkedBag

之间的交互：

package Chapter3;

public interface BagInterface<T> {

/** Gets the current number of entries in the bag.
* @return the integer number of entries in the bag. */
public int getCurrentSize();

/** Sees whether this bag is full.
*@return true if the bag is full, or false if not. */
public boolean isFull();

/** Sees whether the bag is empty.
*@return true if bag is empty, or false if not. */
public boolean isEmpty();

/** Adds new entry to this bag.
*@param newEntry the object to be added as a new entry
*@return if the addition was successful, or false if not. */
public boolean add(T newEntry);

/** Removes one unspecified entry from this bag, if possible.
*@return either the removed entry, if the removal was successful, or null. */
public T remove();

/** Removes one occurrence of a given entry from this bag.
*@param anEntry the entry to be removed
*@return true id the removal was successful, or false if not. */
public boolean removal(T anEntry);

/** Removes all entries from this bag. */
public void clear();

/** Counts the number of times a given entry appears in this bag.
*@param anEntry the entry to be counted
*@return the number of times anEntry appears in the bag. */
public int getFrequencyOf(T anEntry);

/** Tests whether this bag contains a given entry.
*@param anEntry the entry to locate
*@return true if this bag contains anEntry, or false if not. */
public boolean contains(T anEntry);

/**Retrieves all entries that are in this bag.
*@return a newly allocated array of all the entries in the bag */
public T[] toArray();
}

---

我已经转录了完整的.java文件，以记录是否需要更多信息，但我试图保持其具体和简洁。

LinkedBag

在您共享的代码中，实现了原始

BagInterface

。如果您想引用它的类型规范，还应该向

LinkedBag

添加类型参数，并让它以某种方式引用

BagInterface

类型。例如：

public class LinkedBag<T>  implements BagInterface<T> { 
// Here --------------^---------------------------^

公共类LinkedBag实现BagInterface{
//这里--------------^---------------------------^

T上的错误无法解析为类型“errors on getData（）”类型LinkedBag.Node中的方法getData（）引用了缺少的类型“T”是什么行导致了此错误？public LinkedBag（T[]item，int numberOfItems）{result[index]=currentNode.getData（）；在这个类中引用的任何地方，.getData（）谢谢，我昨晚正在做这件事，撞到了墙，我正在工作，所以我无法测试它，但我会这样做，看看我的问题是否得到解决..我想也许我只是没有将这些类链接在一起，但它们存在于同一个包中（我对编译器的知识同样有限）这学期才开始使用eclipse

(error occurs here) result[index] = currentNode.getData();
index++;
currentNode = currentNode.getNextNode();
}// end while
return result;
}// end is full

public class LinkedBag<T>  implements BagInterface<T> { 
// Here --------------^---------------------------^