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1 /* |
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2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
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3 * |
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4 * Redistribution and use in source and binary forms, with or without |
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5 * modification, are permitted provided that the following conditions |
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6 * are met: |
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7 * |
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8 * - Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * |
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11 * - Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in the |
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13 * documentation and/or other materials provided with the distribution. |
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14 * |
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15 * - Neither the name of Oracle nor the names of its |
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16 * contributors may be used to endorse or promote products derived |
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17 * from this software without specific prior written permission. |
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18 * |
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19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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30 */ |
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31 |
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32 // Converting between #javascript Date and #java8 LocalDateTime with #nashorn |
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33 |
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34 // JavaScript Date with current time |
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35 var d = new Date(); |
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36 print(d); |
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37 |
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38 // Java 8 java.time classes used |
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39 var Instant = java.time.Instant; |
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40 var LocalDateTime = java.time.LocalDateTime; |
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41 var ZoneId = java.time.ZoneId; |
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42 |
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43 // Date.prototype.getTime |
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44 |
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45 // getTime() method returns the numeric value corresponding to the time |
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46 // for the specified date according to universal time. The value returned |
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47 // by the getTime() method is the number of milliseconds since 1 January 1970 00:00:00 UTC. |
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48 // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime |
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49 |
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50 // Java Instant.ofEpochMilli to convert time in milliseconds to Instant object |
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51 // https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#ofEpochMilli-long- |
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52 |
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53 var instant = Instant.ofEpochMilli(d.getTime()); |
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54 |
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55 // Instant to LocalDateTime using LocalDateTime.ofInstant |
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56 // https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#ofInstant-java.time.Instant-java.time.ZoneId- |
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57 |
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58 var ldt = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()); |
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59 print(ldt); |
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60 |
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61 // converting a LocalDateTime to JavaScript Date |
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62 // convert LocalDateTime to Instant first |
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63 // https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#atZone-java.time.ZoneId- |
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64 |
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65 var instant = ldt.atZone(ZoneId.systemDefault()).toInstant(); |
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66 |
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67 // instant to to epoch milliseconds |
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68 // https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#toEpochMilli-- |
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69 // and then to JavaScript Date from time in milliseconds |
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70 // https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date |
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71 |
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72 var d1 = new Date(instant.toEpochMilli()); |
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73 print(d1); |