set vector

向量类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()方法用于在给定元素(ele)存在的情况下将其替换为给定元素(ele)，否则它将在给定Vector的给定索引处设置给定元素。

• 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()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

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

  set()方法在替换元素时可能会引发异常。

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

  ArrayIndexOutOfBoundsException ：如果给定的第一个参数不在范围内，则可能引发此异常。

Syntax:

句法：

    public Element set(int indices, Element ele);

Parameter(s):

参数：

• int indices – represents the indices of replacing element.

  int index –表示替换元素的索引。

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

  元素ele –表示要在给定索引处设置的元素。

Return value:

返回值：

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

方法的返回类型为Element ，如果存在，它将在给定索引处返回旧元素。

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

输出量

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

翻译自: https://www.includehelp.com/java/vector-set-method-with-example.aspx

set vector