set vector

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

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

  set()方法在java.util包中可用。

• set() method is used to replace the old element with the given element (ele) when it exists otherwise it sets the given element at the given indices in this Vector.

  set()方法用于在給定元素(ele)存在的情況下將其替換為給定元素(ele)，否則它將在給定Vector的給定索引處設置給定元素。

• set() 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.

  set()方法是一個非靜態方法，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。

• set() method may throw an exception at the time of replacing the element.

  set()方法在替換元素時可能會引發異常。

  ArrayIndexOutOfBoundsException: This exception may throw when the given first parameter is not in a range.

  ArrayIndexOutOfBoundsException ：如果給定的第一個參數不在范圍內，則可能引發此異常。

Syntax:

句法：

    public Element set(int indices, Element ele);

Parameter(s):

參數：

• int indices – represents the indices of replacing element.

  int index –表示替換元素的索引。

• Element ele – represents the element to be set at the given indices.

  元素ele –表示要在給定索引處設置的元素。

Return value:

返回值：

The return type of the method is Element, it returns the old element at the given indices when exists.

方法的返回類型為Element ，如果存在，它將在給定索引處返回舊元素。

Example:

例：

// Java program to demonstrate the example 
// of Element set(int indices, Element ele) method 
// of Vector 
import java.util.*;
public class SetOfVector {
public static void main(String[] args) {
// Instantiates a Vector object  with
// initial capacity of "10"
Vector < String > v = new Vector < String > (10);
// By using add() method is to add the
// elements in this v
v.add("C");
v.add("C++");
v.add("JAVA");
// Display Vector
System.out.println("v: " + v);
// By using set() method is to
// replace the element JAVA at the 
// indices 2 with the given element
// SFDC
v.set(2, "SFDC");
// Display updated vector
System.out.println("v.set(2, SFDC): " + v);
}
}

Output

輸出量

v: [C, C++, JAVA]
v.set(2, SFDC): [C, C++, SFDC]

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

set vector