Time in Java

1.System class Acquisition

　　At the current time , the System class cannot be instantiated and needs to be called through its static method.

Use the System class Currenttimemillis () method to get the current system time. Returns the time in milliseconds, and the granularity of the value depends on the underlying operating system.

 Public Static long Currenttimemillis ()

Return value type: Long

long currenttime = system.currenttimemillis (); System.out.println (currenttime);

2.Date class

The class Date represents a specific instantaneous, accurate to milliseconds.

How to construct the Date class

Format	Parameter list	Description
Date ()	Null parameter	Gets an object that represents the current system time
Date (long date)	An integer of type long, in milliseconds of absolute time

Null parameter gets the current time, specifying a long integer to get the time point corresponding to the integer

SYSTEM.OUT.PRINTLN (new//  Print current system time System.out.println (new//  Print absolute time 0 point in time information System.out.println (new//  Print absolute time the day before the point information

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Time in Java