vector clone

向量类clone()方法 (Vector Class clone() method)

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

  clone()方法在java.util包中可用。

• clone() method is used to copy or clone or return a shallow copy of this Vector.

  clone()方法用于复制，克隆或返回此Vector的浅表副本。

• clone() 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.

  clone()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。

• clone() method may throw an exception at the time of cloning an object.

  clone()方法在克隆对象时可能会引发异常。

  CloneNotSupportedException: This exception may throw when this Vector class unsupported a Cloneable interface.

  CloneNotSupportedException ：当此Vector类不支持Cloneable接口时，可能会引发此异常。

Syntax:

句法：

    public Object clone();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is Object, it returns cloned copy of this Vector.

方法的返回类型为Object ，它返回此Vector的克隆副本。

Example:

例：

// Java program to demonstrate the example 
// of Object clone() method of Vector 
import java.util.Vector;
public class CloneOfVector {
public static void main(String[] args) {
// Instantiates a Vector object  with
// initial capacity of "10"
Vector < String > v = new Vector < String > (10);
Vector < String > clone_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 clone() method is to
// clone this vector v
clone_v = (Vector) v.clone();
// Display Cloned Vector
System.out.println("v.clone(): " + clone_v);
}
}

Output

输出量

v: [C, C++, JAVA]
v.clone(): [C, C++, JAVA]

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

vector clone