java enumset

EnumSet类clone()方法 (EnumSet 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 return a shallow copy of this EnumSet.

  clone()方法用于返回此EnumSet的浅表副本。

• clone() method is a non-static method, it is accessible with the class object and if we try to access the method with the class name then we will get an error.

  clone()方法是一种非静态方法，可通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• clone() method does not throw an exception at the time of cloning EnumSet.

  clone()方法在克隆EnumSet时不会引发异常。

Syntax:

句法：

public EnumSet 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 this method is EnumSet, it returns cloned copy of this EnumSet.

此方法的返回类型为EnumSet ，它返回此EnumSet的克隆副本。

Example:

例：

// Java program is to demonstrate the example of// clone() method of EnumSetimport java.util.*;public class CloneOfEnumSet {
       // Initialize a enum variable    // with some constants    public enum Colors {
           RED,        BLUE,        GREEN,        PURPLE,        YELLOW    };    public static void main(String[] args) {
           // Here , we are creating two EnumSet        // First EnumSet is intiatize with some         // values and Second EnumSet is empty        EnumSet es = EnumSet.allOf(Colors.class);        EnumSet < Colors > clone_es = null;        // Display EnumSet        System.out.println("EnumSet (es): " + es);        System.out.println("EnumSet (clone_es): " + clone_es);        // By using clone() method is to        // clone EnumSet es         clone_es = es.clone();        // Display Cloned EnumSet        System.out.println("es.clone(): " + clone_es);    }}

Output

输出量

EnumSet (es): [RED, BLUE, GREEN, PURPLE, YELLOW]EnumSet (clone_es): nulles.clone(): [RED, BLUE, GREEN, PURPLE, YELLOW]

翻译自:

java enumset