java timestamp

1Timestamp timestamp = new Timestamp(System.currentTimeMillis());
2//2016-11-16 06:43:19.77
3Copy

1
2  // 2021-03-24 16:48:05.591
3  Timestamp timestamp = new Timestamp(System.currentTimeMillis());
4
5  // 2021-03-24 16:48:05.591
6  Date date = new Date();
7  Timestamp timestamp2 = new Timestamp(date.getTime());
8
9  // convert Instant to Timestamp
10  Timestamp ts = Timestamp.from(Instant.now())
11
12  // convert ZonedDateTime to Instant to Timestamp
13  Timestamp ts = Timestamp.from(ZonedDateTime.now().toInstant()));
14
15  // convert Timestamp to Instant
16  Instant instant = ts.toInstant();
17

1package com.mkyong.date;
2
3import java.sql.Timestamp;
4import java.text.SimpleDateFormat;
5import java.util.Date;
6
7public class TimeStampExample {
8
9    private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");
10
11    public static void main(String[] args) {
12
13        //method 1
14        Timestamp timestamp = new Timestamp(System.currentTimeMillis());
15        System.out.println(timestamp);
16
17        //method 2 - via Date
18        Date date = new Date();
19        System.out.println(new Timestamp(date.getTime()));
20
21        //return number of milliseconds since January 1, 1970, 00:00:00 GMT
22        System.out.println(timestamp.getTime());
23
24        //format timestamp
25        System.out.println(sdf.format(timestamp));
26        
27    }
28
29}
30Copy

1
2package com.mkyong.app;
3
4import java.sql.Timestamp;
5import java.text.SimpleDateFormat;
6import java.util.Date;
7
8public class TimeStampExample {
9
10    // 2021.03.24.16.34.26
11    private static final SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");
12
13    // 2021-03-24T16:44:39.083+08:00
14    private static final SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
15
16    // 2021-03-24 16:48:05
17    private static final SimpleDateFormat sdf3 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
18
19    public static void main(String[] args) {
20
21        // method 1
22        Timestamp timestamp = new Timestamp(System.currentTimeMillis());
23        System.out.println(timestamp);                      // 2021-03-24 16:34:26.666
24
25        // method 2 - via Date
26        Date date = new Date();
27        System.out.println(new Timestamp(date.getTime()));  // 2021-03-24 16:34:26.666
28                                                            // number of milliseconds since January 1, 1970, 00:00:00 GMT
29        System.out.println(timestamp.getTime());            // 1616574866666
30
31        System.out.println(sdf1.format(timestamp));         // 2021.03.24.16.34.26
32
33        System.out.println(sdf2.format(timestamp));         // 2021-03-24T16:48:05.591+08:00
34
35        System.out.println(sdf3.format(timestamp));         // 2021-03-24 16:48:05
36
37    }
38}
39