-
Notifications
You must be signed in to change notification settings - Fork 3
Expand file tree
/
Copy pathDateHandling.java
More file actions
executable file
·96 lines (81 loc) · 4.53 KB
/
Copy pathDateHandling.java
File metadata and controls
executable file
·96 lines (81 loc) · 4.53 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
/**
* Copyright (c) 2018 Araf Karsh Hamid
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
* or (per the licensee's choosing)
* under the terms of the Apache 2 License version 2.0
* as published by the Apache Software Foundation.
*/
package java08.time;
import java.util.Date;
/**
* public class Timestamp extends Date
*
* A thin wrapper around java.util.Date that allows the JDBC API to identify this as an SQL TIMESTAMP value.
* It adds the ability to hold the SQL TIMESTAMP fractional seconds value, by allowing the specification of
* fractional seconds to a precision of nanoseconds. A Timestamp also provides formatting and parsing operations
* to support the JDBC escape syntax for timestamp values.
*
* The precision of a Timestamp object is calculated to be either:
*
* 19 , which is the number of characters in yyyy-mm-dd hh:mm:ss
* 20 + s , which is the number of characters in the yyyy-mm-dd hh:mm:ss.[fff...] and s represents the scale of the
* given Timestamp, its fractional seconds precision.
*
* Note: This type is a composite of a java.util.Date and a separate nanoseconds value. Only integral seconds are stored in
* the java.util.Date component. The fractional seconds - the nanos - are separate. The Timestamp.equals(Object) method never
* returns true when passed an object that isn't an instance of java.sql.Timestamp, because the nanos component of a date is
* unknown. As a result, the Timestamp.equals(Object) method is not symmetric with respect to the java.util.Date.equals(Object)
* method. Also, the hashCode method uses the underlying java.util.Date implementation and therefore does not include nanos in
* its computation.
*
* Due to the differences between the Timestamp class and the java.util.Date class mentioned above, it is recommended that code
* not view Timestamp values generically as an instance of java.util.Date. The inheritance relationship between Timestamp and
* java.util.Date really denotes implementation inheritance, and not type inheritance.
*
*
* Java's java.sql.Timestamp class is used in the JDBC API. If you need to set a date + time on a
* java.sql.PreparedStatement or get a date + time from a java.sql.ResultSet, you will interact
* with java.sql.Timestamp.
*
* Actually, java.sql.Timestamp extends java.util.Date, so anything you can do with a java.util.Date
* you can also do with a java.sql.Timestamp. Check out java.util.Date for more details.
*
* Nanoseconds
*
* One difference in the java.sql.Timestamp from its superclass java.util.Date is its ability to hold the nanoseconds
* of a date too. You can get and set the nanoseconds using the getNanos() and setNanos().
*
* @author: Araf Karsh Hamid
* @version:
* @date:
*/
public class DateHandling {
public static void main(String[] args) {
Date dt = new Date();
long time = System.currentTimeMillis();
java.sql.Timestamp timestamp1 = new java.sql.Timestamp(time);
java.sql.Timestamp timestamp2 = new java.sql.Timestamp(dt.getTime());
timestamp1.setNanos(123456);
timestamp2.setNanos(678911); // Checkout instead 10 (last 2 digits) why did i put 11?
System.out.println("Java Util Date \t\t= "+dt);
System.out.println("Java SQL Timestamp1 \t= "+timestamp1);
System.out.println("Java SQL Timestamp2 \t= "+timestamp2);
System.out.println("Timestamp1 Nanos \t= "+timestamp1.getNanos());
System.out.println("Timestamp2 Nanos \t= "+timestamp2.getNanos());
}
}