java 方法 示例

集合類checkedList()方法 (Collections Class checkedList() method)

• checkedList() Method is available in java.lang package.

  CheckedList()方法在java.lang包中可用。

• checkedList() Method is used to return the typesafe view of the given List at runtime.

  checkedList()方法用于在運行時返回給定List的類型安全視圖。

• checkedList() Method is a static method, so it is accessible with the class name and if we try to access the method with the class object then we will not get an error.

  CheckedList()方法是靜態方法，因此可以使用類名進行訪問，如果嘗試使用類對象訪問該方法，則不會收到錯誤。

• checkedList() Method does not throw an exception at the time of returning validated List.

  CheckedList()方法在返回經過驗證的List時不會引發異常。

Syntax:

句法：

public static List checkedList(List l, Class ele_ty);

Parameter(s):

參數：

• List l – represents the list for which to get typesafe view at runtime.

  列表l –表示在運行時獲取類型安全視圖的列表。

• Class ele_ty – represents the element type (ele_ty) that the given List is allowed to store.

  ele_ty類 –表示允許存儲給定List的元素類型(ele_ty)。

Return value:

返回值：

The return type of the method is List, it returns typesafe or validated view of the given List dynamically.

方法的返回類型為List ，它動態返回給定List的類型安全或經過驗證的視圖。

Example:

例：

// Java Program is to demonstrate the example // of List checkedList(List l, Class ele_ty) of Collections classimport java.util.*;public class CheckedList {public static void main(String args[]) {// Create a linked list object LinkedList < Integer > link_list = new LinkedList < Integer > ();// By using add() method is to add the// given elements in linked listlink_list.add(20);link_list.add(10);link_list.add(30);link_list.add(40);link_list.add(50);// Display LinkedListSystem.out.println("link_list: " + link_list);// By using checkedList() method is to // represent the type safe view of the given// Collection linked listCollection < Integer > co = Collections.checkedList(link_list, Integer.class);System.out.println();System.out.println("Collections.checkedList(link_list, Integer.class) :");// Display collectionSystem.out.println("co: " + co);} }

Output

輸出量

link_list: [20, 10, 30, 40, 50]Collections.checkedList(link_list, Integer.class) : co: [20, 10, 30, 40, 50]

翻譯自: https://www.includehelp.com/java/collections-checkedlist-method-with-example.aspx

java 方法 示例

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