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java - Android System.currentTimeMillis() value is different on firebase database than generated on app logcat - Stack Overflow
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code smell] System.currentTimeMillis() is a static method ,wrap it as a class method is inconvenient. · Issue #5720 · apache/rocketmq · GitHub
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14.13 How to use CurrentTimeMillis of System Class to calculate execution time in Java Tutorial - YouTube
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Android: Problem with Time Interval when using UTC: System.currentTimeMillis() | by Leo N | Level Up Coding
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