| #// Usage: jjs -fx barchart_weather.js |
| |
| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| // Example that retrieves weather data from a URL in JSON |
| // format and draws bar chart using JavaFX |
| |
| // -fx check |
| if (! $OPTIONS._fx) { |
| print("Usage: jjs -fx barchart_weather.js"); |
| exit(1); |
| } |
| |
| // Java classes used |
| var URL = Java.type("java.net.URL"); |
| var BufferedReader = Java.type("java.io.BufferedReader"); |
| var InputStreamReader = Java.type("java.io.InputStreamReader"); |
| |
| // function to retrieve text content of the given URL |
| function readTextFromURL(url) { |
| var str = ''; |
| var u = new URL(url); |
| var reader = new BufferedReader( |
| new InputStreamReader(u.openStream())); |
| try { |
| reader.lines().forEach(function(x) str += x); |
| return str; |
| } finally { |
| reader.close(); |
| } |
| } |
| |
| // change URL for your city here! |
| var url = "http://api.openweathermap.org/data/2.5/forecast?q=chennai,india&units=metric&mode=json"; |
| |
| // download JSON document and parse |
| var json = readTextFromURL(url); |
| var weather = JSON.parse(json); |
| |
| // View JSON of this using site such as http://www.jsoneditoronline.org/ to know |
| // about the JSON data format used by this site |
| |
| // Extracted data from the json object |
| var temp = weather.list.map(function(x) x.main.temp); |
| var temp_min = weather.list.map(function(x) x.main.temp_min); |
| var temp_max = weather.list.map(function(x) x.main.temp_max); |
| var date = weather.list.map(function(x) x.dt_txt); |
| |
| // JavaFX classes used |
| var Scene = Java.type("javafx.scene.Scene"); |
| var BarChart = Java.type("javafx.scene.chart.BarChart"); |
| var CategoryAxis = Java.type("javafx.scene.chart.CategoryAxis"); |
| var NumberAxis = Java.type("javafx.scene.chart.NumberAxis"); |
| var XYChart = Java.type("javafx.scene.chart.XYChart"); |
| |
| function start(stage) { |
| stage.title="Chennai Weather Bar Chart"; |
| var xAxis = new CategoryAxis(); |
| xAxis.label = "date/time"; |
| var yAxis = new NumberAxis(); |
| yAxis.label = "temp in C"; |
| var bc = new BarChart(xAxis, yAxis); |
| |
| // 3 bars per datetime item - temp, min temp and max temp |
| var s1 = new XYChart.Series(); |
| s1.name = "temp"; |
| for (d in date) { |
| s1.data.add(new XYChart.Data(date[d], temp[d])); |
| } |
| |
| var s2 = new XYChart.Series(); |
| s2.name = "min temp"; |
| for (d in date) { |
| s2.data.add(new XYChart.Data(date[d], temp_min[d])); |
| } |
| |
| var s3 = new XYChart.Series(); |
| s3.name = "max temp"; |
| for (d in date) { |
| s3.data.add(new XYChart.Data(date[d], temp_max[d])); |
| } |
| |
| bc.data.addAll(s1, s2, s3); |
| |
| stage.scene = new Scene(bc, 800, 600); |
| stage.show(); |
| } |