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

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

  setElementAt()方法在java.util包中可用。

• setElementAt() method is used to set the given element (ele) at the given indices in this Vector.

  setElementAt()方法用于在此Vector中的給定索引處設置給定元素(ele)。

• setElementAt() 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.

  setElementAt()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。

• setElementAt() method may throw an exception at the time of setting an element.

  setElementAt()方法在設置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 void setElementAt(Element ele, int indices);

Parameter(s):

參數：

• 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。

• int indices – represents the indices of the given element to be set.

  int index –表示要設置的給定元素的索引。

Return value:

返回值：

The return type of the method is void, it returns nothing.

該方法的返回類型為void ，不返回任何內容。

Example:

例：

// Java program to demonstrate the example 
// of void setElementAt(Element ele, int indices) method 
// of Vector 
import java.util.*;
public class SetElementAtOfVector {
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 setElementAt() method is to
// set the element at the given indices
v.setElementAt("SFDC", 2);
// Display updated vector
System.out.println("v.setElementAt(SFDC, 2): " + v);
}
}

Output

輸出量

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

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