Java's simple manipulation of time

This article illustrates a simple way to manipulate time in Java. Share with you for your reference. Specific analysis is as follows:

The Date used here refers to java.util.Date.

Ps: using Java operation time feel really really painful, or I am comfortable with C#, a DateTime all done

Get current time:

//Create a Date object 
 for the current time
Date time = new Date();

Where the egg hurts, increase or decrease the operation of time:

//Use the Calendar class to add or subtract time 

Calendar c = Calendar.getInstance();//Gets a Calendar instance, which is an abstract class so you can't use the new constructor 

//Use the setTime method to create a time of type Date 

c.setTime(time);

//Add 12 months to the current time, add units 
 depending on the Calendar enumeration value
c.add(Calendar.MONTH, 12);

//Turn Calendar into a Date object 

Date dateTime = c.getTime();

Again egg sore place, format time, convenient for people to see the format:

//Use SimpleDateFormat to format the time as a string 

String timeStr = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(time);

Simple operation, memo:

Convenient timestamp conversion:

/**

*  Converts a time object to a timestamp 

* 

* @param time

*             time 

* @return  The time stamp 

*/

public static long DateToLong(Date time) {

        try {

            long timeL = time.getTime();

            System.out.print(timeL);

            return timeL;

        } catch (Exception e) {

            e.printStackTrace();

            return 0;

        }

}
/**

*  Converts a timestamp to a time object 

* 

* @param time

*             The time stamp 

* @return  Time object 

*/

public static Date LongToDate(long time) {

        Date date = null;

        try {

            date = new Date(time);

            System.out.println(date);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return date;

}

I hope this article has been helpful to your Java programming.