java uuid静态方法

UUID类compareTo()方法 (UUID Class compareTo() method)

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

  compareTo()方法在java.util包中可用。

• compareTo() method is used to compare two UUID objects or in other words, it is used to compare this UUID with the given object (ob).

  compareTo()方法用于比较两个UUID对象，换句话说，它用于将该UUID与给定对象(ob)比较。

• compareTo() 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.

  compareTo()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。

• compareTo() method does not throw an exception at the time of comparing two objects.

  比较两个对象时， compareTo()方法不会引发异常。

Syntax:

句法：

public int compareTo(UUID ob);

Parameter(s):

参数：

• UUID ob – represents the UUID object to be compared with this UUID.

  UUID ob –表示要与此UUID比较的UUID对象。

Return value:

返回值：

The return type of the method is int, it returns any one of the given three values [0,1 and -1],

方法的返回类型为int ，它返回给定的三个值[0,1和-1]中的任何一个，

• When (This UUID) < (UUID ob), it returns -1.

  当(This UUID)<(UUID ob)时，它返回-1。

• When (This UUID) == (UUID ob), it returns 0.

  当(This UUID)==(UUID ob)时，它返回0。

• When (This UUID) > (UUID ob), it returns 1.

  当(此UUID)>(UUID ob)时，它将返回1。

Example:

例：

// Java program to demonstrate the example // of int compareTo(UUID ob) method of UUID import java.util.*;public class CompareToOfUUID {
       public static void main(String[] args) {
           // Instantiate UUID            UUID uuid1 = UUID.fromString("46400000-8cc0-11bd-b43e-10d46e4ef14d");        UUID uuid2 = UUID.fromString("56500000-8cd0-10bd-b65e-10d46e4ef14d");        // By using compareTo() method is        // to compare this object with the given object        int result = uuid1.compareTo(uuid2);        System.out.println("uuid1.compareTo(uuid2): " + result);    }}

Output

输出量

uuid1.compareTo(uuid2): -1

翻译自:

java uuid静态方法