java sublist

向量類subList()方法 (Vector Class subList() method)

• subList() method is available in java.util package.

  subList()方法在java.util包中可用。

• subList() method is used to return a set of sublist [it returns all those elements exists in a given range starting index (st_index) and ending index (en_index) and here st_index is inclusive whereas en_index is exclusive].

  subList()方法用于返回一組子列表[它返回給定范圍內存在的所有那些元素，即開始索引(st_index)和結束索引(en_index)，其中st_index是包含的，而en_index是排除的]。

• subList() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  subList()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• subList() method may throw an exception at the time of returning sublist.

  subList()方法在返回子列表時可能會引發異常。

  • IndexOutOfBoundsException: This exception may throw when the second parameter is not in a range.IndexOutOfBoundsException ：當第二個參數不在范圍內時，可能引發此異常。
  • IllegalArgumentException: This exception may throw when the second argument is not valid.IllegalArgumentException ：當第二個參數無效時，可能引發此異常。

Syntax:

句法：

public List subList(int st_index, int en_index);

Parameter(s):

參數：

• int st_index – represents the starting position of the returned sublist.

  int st_index –表示返回的子列表的起始位置。

• int en_index – represents the ending position of the returned sublist.

  int en_index –表示返回的子列表的結束位置。

Return value:

返回值：

The return type of the method is List, it returns all the element in a given range and elements are viewed in a List.

方法的返回類型為List ，它返回給定范圍內的所有元素，并在List中查看元素。

Example:

例：

// Java program to demonstrate the example // of List subList(int st_index, int en_index) // method of Vector import java.util.*;public class SubListOfVector {public static void main(String[] args) {// Instantiates a Vector object with// initial capacity of "10"Vector < String > v = new Vector < String > (10);List arr_l = new ArrayList();// By using add() method is to add the// elements in this vv.add("C");v.add("C++");v.add("JAVA");// By using add() method is to add the// elements in this arr_larr_l.add("SFDC");// Display Vector and ArrayListSystem.out.println("v: " + v);System.out.println("arr_l: " + arr_l);// By using subList() method is to// return the sublist, starting at one// endpoint and ending at other endpointarr_l = v.subList(0, 2);// Display updated arr_lSystem.out.println("v.subList(0,2): " + arr_l);} }

Output

輸出量

v: [C, C++, JAVA] arr_l: [SFDC] v.subList(0,2): [C, C++]

翻譯自: https://www.includehelp.com/java/vector-sublist-method-with-example.aspx

java sublist

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