矢量类insertElementAt()方法 (Vector Class insertElementAt() method)

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

  insertElementAt()方法在java.util包中可用。

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

  insertElementAt()方法用于在Vector的给定(索引)处设置给定元素(ele)。

• insertElementAt() 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.

  insertElementAt()方法是一种非静态方法，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。

• insertElementAt() method may throw an exception at the time of the inserting element.

  insertElementAt()方法在插入元素时可能会引发异常。

  ArrayIndexOutOfBoundsException: This exception may throw when the given indices are not in a range.

  ArrayIndexOutOfBoundsException ：如果给定索引不在范围内，则可能引发此异常。

Syntax:

句法：

    public void insertElementAt(Element ele, int indices);

Parameter(s):

参数：

• Element ele – represents the element to be added.

  元素ele –表示要添加的元素。

• int indices – represents the position of inserted element.

  int索引 –表示插入元素的位置。

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 insertElementAt(Element ele, int indices)
// method of Vector
import java.util.*;
public class InsertElementAtOfVector {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 insertElementAt("SFDC", 1) method is
// to insert the given object "SFDC" at the given
// indices "1"
v.insertElementAt("SFDC", 1);
// Display updated vector
System.out.println("v.insertElementAt(SFDC, 1): " + v);
}
}

Output

输出量

v: [C, C++, JAVA]
v.insertElementAt(SFDC, 1): [C, SFDC, C++, JAVA]

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