Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: samples/barchart_weather.js
samples/barchart_weather.js
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| 1 #// Usage: jjs -fx barchart_weather.js | |
| 2 | |
| 3 /* | |
| 4 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * | |
| 10 * - Redistributions of source code must retain the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer. | |
| 12 * | |
| 13 * - Redistributions in binary form must reproduce the above copyright | |
| 14 * notice, this list of conditions and the following disclaimer in the | |
| 15 * documentation and/or other materials provided with the distribution. | |
| 16 * | |
| 17 * - Neither the name of Oracle nor the names of its | |
| 18 * contributors may be used to endorse or promote products derived | |
| 19 * from this software without specific prior written permission. | |
| 20 * | |
| 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
| 22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| 25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 */ | |
| 33 | |
| 34 // Example that retrieves weather data from a URL in JSON | |
| 35 // format and draws bar chart using JavaFX | |
| 36 | |
| 37 // -fx check | |
| 38 if (! $OPTIONS._fx) { | |
| 39 print("Usage: jjs -fx barchart_weather.js"); | |
| 40 exit(1); | |
| 41 } | |
| 42 | |
| 43 // Java classes used | |
| 44 var URL = Java.type("java.net.URL"); | |
| 45 var BufferedReader = Java.type("java.io.BufferedReader"); | |
| 46 var InputStreamReader = Java.type("java.io.InputStreamReader"); | |
| 47 | |
| 48 // function to retrieve text content of the given URL | |
| 49 function readTextFromURL(url) { | |
| 50 var str = ''; | |
| 51 var u = new URL(url); | |
| 52 var reader = new BufferedReader( | |
| 53 new InputStreamReader(u.openStream())); | |
| 54 try { | |
| 55 reader.lines().forEach(function(x) str += x); | |
| 56 return str; | |
| 57 } finally { | |
| 58 reader.close(); | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 // change URL for your city here! | |
| 63 var url = "http://api.openweathermap.org/data/2.5/forecast?q=chennai,india&units=metric&mode=json"; | |
| 64 | |
| 65 // download JSON document and parse | |
| 66 var json = readTextFromURL(url); | |
| 67 var weather = JSON.parse(json); | |
| 68 | |
| 69 // View JSON of this using site such as http://www.jsoneditoronline.org/ to know | |
| 70 // about the JSON data format used by this site | |
| 71 | |
| 72 // Extracted data from the json object | |
| 73 var temp = weather.list.map(function(x) x.main.temp); | |
| 74 var temp_min = weather.list.map(function(x) x.main.temp_min); | |
| 75 var temp_max = weather.list.map(function(x) x.main.temp_max); | |
| 76 var date = weather.list.map(function(x) x.dt_txt); | |
| 77 | |
| 78 // JavaFX classes used | |
| 79 var Scene = Java.type("javafx.scene.Scene"); | |
| 80 var BarChart = Java.type("javafx.scene.chart.BarChart"); | |
| 81 var CategoryAxis = Java.type("javafx.scene.chart.CategoryAxis"); | |
| 82 var NumberAxis = Java.type("javafx.scene.chart.NumberAxis"); | |
| 83 var XYChart = Java.type("javafx.scene.chart.XYChart"); | |
| 84 | |
| 85 function start(stage) { | |
| 86 stage.title="Chennai Weather Bar Chart"; | |
| 87 var xAxis = new CategoryAxis(); | |
| 88 xAxis.label = "date/time"; | |
| 89 var yAxis = new NumberAxis(); | |
| 90 yAxis.label = "temp in C"; | |
| 91 var bc = new BarChart(xAxis, yAxis); | |
| 92 | |
| 93 // 3 bars per datetime item - temp, min temp and max temp | |
| 94 var s1 = new XYChart.Series(); | |
| 95 s1.name = "temp"; | |
| 96 for (d in date) { | |
| 97 s1.data.add(new XYChart.Data(date[d], temp[d])); | |
| 98 } | |
| 99 | |
| 100 var s2 = new XYChart.Series(); | |
| 101 s2.name = "min temp"; | |
| 102 for (d in date) { | |
| 103 s2.data.add(new XYChart.Data(date[d], temp_min[d])); | |
| 104 } | |
| 105 | |
| 106 var s3 = new XYChart.Series(); | |
| 107 s3.name = "max temp"; | |
| 108 for (d in date) { | |
| 109 s3.data.add(new XYChart.Data(date[d], temp_max[d])); | |
| 110 } | |
| 111 | |
| 112 bc.data.addAll(s1, s2, s3); | |
| 113 | |
| 114 stage.scene = new Scene(bc, 800, 600); | |
| 115 stage.show(); | |
| 116 } |
