UUID是128位值。 Java中UUID類的getMostSignificantBits()方法用于擷取此UUID的最高有效64位。
用法:
public long getMostSignificantBits()
參數：該方法不帶任何參數。
傳回值：該方法傳回一個整數值，該值是此128個值的UUID的最高有效64位。
以下示例程式旨在說明getMostSignificantBits()方法的用法：
示例1:
// Java code to illustrate
// getMostSignificantBits() method
import java.util.*;
public class UUID_Demo {
public static void main(String[] args)
{
// Creating two UUIDs
UUID UUID_1
= UUID
.fromString(
"58e0a7d7-eebc-11d8-9669-0800200c9a66");
// Displaying the UUID
System.out.println("UUID: "
+ UUID_1);
// Displaying the value of UUID
System.out.println("The value is: "
+ UUID_1.clockSequence());
// Getting the most significant 64 bit
System.out.println("The most significant 64 bit: "
+ UUID_1
.getMostSignificantBits());
}
}
輸出：
UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The value is: 5737
The most significant 64 bit: 6404303215985955288
示例2:
// Java code to illustrate
// getMostSignificantBits() method
import java.util.*;
public class UUID_Demo {
public static void main(String[] args)
{
// Creating two UUIDs
UUID UUID_1
= UUID
.fromString(
"58e0a7d7-eebc-11d8-9669-0800200c9a66");
// Displaying the UUID
System.out.println("UUID: "
+ UUID_1);
// Displaying the value of UUID
System.out.println("The value is: "
+ UUID_1.clockSequence());
// Getting the most significant 64 bit
System.out.println("The most significant 64 bit: "
+ UUID_1.getMostSignificantBits());
}
}
輸出：
UUID: 58e0a7d7-eebc-11d8-9669-0800200c9a66
The value is: 5737
The most significant 64 bit: 6404303215985955288