Java TimeUnit toMillis()方法及示例

TimeUnit类 的 toMillis() 方法用于获取TimeUnit对象所代表的时间，作为1970年1月1日UTC午夜后的秒数。

语法

public long toMillis(long duration)

参数： 该方法接受一个强制性参数 duration ，它是以毫秒为单位的持续时间。
返回值： 该方法返回 转换后的持续时间 为Seconds。以下程序说明了TimeUnit toMillis()方法的实现：

程序1 :

// Java program to demonstrate// toMillis() method of TimeUnit Class import java.util.concurrent.*;import java.util.Date; class GFG {    public static void main(String args[])    {        // Get current time in seconds        long timeInSec = (new Date().getTime()) / 1000;         // Create a TimeUnit object        TimeUnit time = TimeUnit.SECONDS;         // Convert seconds to milliSeconds        // using toMillis() method        System.out.println("Time " + timeInSec                           + " Seconds in MilliSeconds = "                           + time.toMillis(timeInSec));    }}

输出

Time 1539585757 Seconds in MilliSeconds = 1539585757000

程序2 。

// Java program to demonstrate// toMillis() method of TimeUnit Class import java.util.concurrent.*;import java.util.Calendar; class GFG {    public static void main(String args[])    {        // Get current time in milliseconds        long timeInSec = (Calendar                              .getInstance()                              .getTimeInMillis())                         / 1000;         // Create a TimeUnit object        TimeUnit time = TimeUnit.SECONDS;         // Convert seconds to milliSeconds        // using toMillis() method        System.out.println("Time " + timeInSec                           + " Seconds in MilliSeconds = "                           + time.toMillis(timeInSec));    }}

输出

Time 1539585759 Seconds in MilliSeconds = 1539585759000