向量类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中的给定索引处设置给定元素(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。

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

  setElementAt()方法在设置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 void setElementAt(Element ele, int indices);

Parameter(s):

参数：

• 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。

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

  int index –表示要设置的给定元素的索引。

Return value:

返回值：

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

该方法的返回类型为void ，不返回任何内容。

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

输出量

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

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