Mon, 17 Apr 2017 11:46:11 -0700
Added tag jdk8u141-b05 for changeset f7fc5fc0e2cb
1 #// Usage: jjs -fx barchart_weather.js
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 */
34 // Example that retrieves weather data from a URL in JSON
35 // format and draws bar chart using JavaFX
37 // -fx check
38 if (! $OPTIONS._fx) {
39 print("Usage: jjs -fx barchart_weather.js");
40 exit(1);
41 }
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");
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 }
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";
65 // download JSON document and parse
66 var json = readTextFromURL(url);
67 var weather = JSON.parse(json);
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
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);
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");
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);
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 }
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 }
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 }
112 bc.data.addAll(s1, s2, s3);
114 stage.scene = new Scene(bc, 800, 600);
115 stage.show();
116 }