1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/barchart_weather.js Wed Apr 27 01:36:41 2016 +0800
1.3 @@ -0,0 +1,116 @@
1.4 +#// Usage: jjs -fx barchart_weather.js
1.5 +
1.6 +/*
1.7 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.8 + *
1.9 + * Redistribution and use in source and binary forms, with or without
1.10 + * modification, are permitted provided that the following conditions
1.11 + * are met:
1.12 + *
1.13 + * - Redistributions of source code must retain the above copyright
1.14 + * notice, this list of conditions and the following disclaimer.
1.15 + *
1.16 + * - Redistributions in binary form must reproduce the above copyright
1.17 + * notice, this list of conditions and the following disclaimer in the
1.18 + * documentation and/or other materials provided with the distribution.
1.19 + *
1.20 + * - Neither the name of Oracle nor the names of its
1.21 + * contributors may be used to endorse or promote products derived
1.22 + * from this software without specific prior written permission.
1.23 + *
1.24 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.25 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.26 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.27 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.28 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.29 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.30 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.31 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.32 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.33 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.34 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.35 + */
1.36 +
1.37 +// Example that retrieves weather data from a URL in JSON
1.38 +// format and draws bar chart using JavaFX
1.39 +
1.40 +// -fx check
1.41 +if (! $OPTIONS._fx) {
1.42 + print("Usage: jjs -fx barchart_weather.js");
1.43 + exit(1);
1.44 +}
1.45 +
1.46 +// Java classes used
1.47 +var URL = Java.type("java.net.URL");
1.48 +var BufferedReader = Java.type("java.io.BufferedReader");
1.49 +var InputStreamReader = Java.type("java.io.InputStreamReader");
1.50 +
1.51 +// function to retrieve text content of the given URL
1.52 +function readTextFromURL(url) {
1.53 + var str = '';
1.54 + var u = new URL(url);
1.55 + var reader = new BufferedReader(
1.56 + new InputStreamReader(u.openStream()));
1.57 + try {
1.58 + reader.lines().forEach(function(x) str += x);
1.59 + return str;
1.60 + } finally {
1.61 + reader.close();
1.62 + }
1.63 +}
1.64 +
1.65 +// change URL for your city here!
1.66 +var url = "http://api.openweathermap.org/data/2.5/forecast?q=chennai,india&units=metric&mode=json";
1.67 +
1.68 +// download JSON document and parse
1.69 +var json = readTextFromURL(url);
1.70 +var weather = JSON.parse(json);
1.71 +
1.72 +// View JSON of this using site such as http://www.jsoneditoronline.org/ to know
1.73 +// about the JSON data format used by this site
1.74 +
1.75 +// Extracted data from the json object
1.76 +var temp = weather.list.map(function(x) x.main.temp);
1.77 +var temp_min = weather.list.map(function(x) x.main.temp_min);
1.78 +var temp_max = weather.list.map(function(x) x.main.temp_max);
1.79 +var date = weather.list.map(function(x) x.dt_txt);
1.80 +
1.81 +// JavaFX classes used
1.82 +var Scene = Java.type("javafx.scene.Scene");
1.83 +var BarChart = Java.type("javafx.scene.chart.BarChart");
1.84 +var CategoryAxis = Java.type("javafx.scene.chart.CategoryAxis");
1.85 +var NumberAxis = Java.type("javafx.scene.chart.NumberAxis");
1.86 +var XYChart = Java.type("javafx.scene.chart.XYChart");
1.87 +
1.88 +function start(stage) {
1.89 + stage.title="Chennai Weather Bar Chart";
1.90 + var xAxis = new CategoryAxis();
1.91 + xAxis.label = "date/time";
1.92 + var yAxis = new NumberAxis();
1.93 + yAxis.label = "temp in C";
1.94 + var bc = new BarChart(xAxis, yAxis);
1.95 +
1.96 + // 3 bars per datetime item - temp, min temp and max temp
1.97 + var s1 = new XYChart.Series();
1.98 + s1.name = "temp";
1.99 + for (d in date) {
1.100 + s1.data.add(new XYChart.Data(date[d], temp[d]));
1.101 + }
1.102 +
1.103 + var s2 = new XYChart.Series();
1.104 + s2.name = "min temp";
1.105 + for (d in date) {
1.106 + s2.data.add(new XYChart.Data(date[d], temp_min[d]));
1.107 + }
1.108 +
1.109 + var s3 = new XYChart.Series();
1.110 + s3.name = "max temp";
1.111 + for (d in date) {
1.112 + s3.data.add(new XYChart.Data(date[d], temp_max[d]));
1.113 + }
1.114 +
1.115 + bc.data.addAll(s1, s2, s3);
1.116 +
1.117 + stage.scene = new Scene(bc, 800, 600);
1.118 + stage.show();
1.119 +}
