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1 package examples.datetime;
2
3 import java.util.Calendar;
4 import java.util.GregorianCalendar;
5
6 import jodd.datetime.JDateTime;
7
8 public class JdtSpeed {
9
10 private static int LOOPS = 1000000;
11
12 public static void main(String args[]) {
13 if (args.length >= 1) {
14 if (args[0].equals("jdt")) {
15 measureJdt();
16 } else if (args[0].equals("gc")) {
17 measureGc();
18 }
19 }
20 }
21
22 public static void measureJdt() {
23
24 JDateTime jdt = new JDateTime();
25
26 long start = System.currentTimeMillis();
27 for (int i = 1; i < LOOPS; i++) {
28 jdt.set(1968, 9, 29);
29 jdt.getYear();
30 jdt.getMonth();
31 jdt.getDayOfMonth();
32
33 jdt.addHour(1);
34 jdt.getWeekOfMonth();
35 jdt.getWeekOfYear();
36 }
37 System.out.println("time: " + (System.currentTimeMillis() - start) + "ms.");
38 }
39
40
41 public static void measureGc() {
42
43 GregorianCalendar gt = new GregorianCalendar();
44
45 long start = System.currentTimeMillis();
46 for (int i = 1; i < LOOPS; i++) {
47 gt.set(1968, 9, 29);
48 gt.get(Calendar.YEAR);
49 gt.get(Calendar.MONTH);
50 gt.get(Calendar.DAY_OF_MONTH);
51
52 gt.roll(Calendar.HOUR, true);
53 gt.get(Calendar.WEEK_OF_MONTH);
54 gt.get(Calendar.WEEK_OF_YEAR);
55 }
56 System.out.println("time: " + (System.currentTimeMillis() - start) + "ms.");
57 }
58
59 }
60 |
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Java API By Example, From Geeks To Geeks.