JAVA-15621, Potential issue in "Guide to UUID in Java" article. (euge…

…np#13271) * JAVA-15621, Potential issue in "Guide to UUID in Java" article. * JAVA-15621, Keep the raw strings in the article to make it easy for users to understand. * JAVA-15621, Keep the raw strings in the article to make it easy for users to understand. Co-authored-by: jogra <[email protected]>
RAM50558 · Jan 16, 2023 · e8ff2e3 · e8ff2e3
1 parent 57975a0
commit e8ff2e3
Showing 1 changed file with 7 additions and 7 deletions.
diff --git a/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDGenerator.java b/core-java-modules/core-java-uuid/src/main/java/com/baeldung/uuid/UUIDGenerator.java
@@ -27,17 +27,17 @@ public static UUID generateType1UUID() {
 
     private static long get64LeastSignificantBitsForVersion1() {
         final long random63BitLong = new Random().nextLong() & 0x3FFFFFFFFFFFFFFFL;
-        final long variant3BitFlag = 0x8000000000000000L;
-        return random63BitLong + variant3BitFlag;
+        long variant3BitFlag = 0x8000000000000000L;
+        return random63BitLong | variant3BitFlag;
     }
 
     private static long get64MostSignificantBitsForVersion1() {
-        final long timeForUuidIn100Nanos = System.currentTimeMillis();
-        final long time_low = (timeForUuidIn100Nanos & 0x0000_0000_FFFF_FFFFL) << 32;
-        final long time_mid = ((timeForUuidIn100Nanos >> 32) & 0xFFFF) << 16;
+        final long currentTimeMillis = System.currentTimeMillis();
+        final long time_low = (currentTimeMillis & 0x0000_0000_FFFF_FFFFL) << 32;
+        final long time_mid = ((currentTimeMillis >> 32) & 0xFFFF) << 16;
         final long version = 1 << 12;
-        final long time_hi = ((timeForUuidIn100Nanos >> 48) & 0x0FFF);
-        return time_low + time_mid + version + time_hi;
+        final long time_high = ((currentTimeMillis >> 48) & 0x0FFF);
+        return time_low | time_mid | version | time_high;
     }
 
     /**