1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
#// 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();
}
|
