Read URL Using java.net.URL

This example shows how to display HTML text from the first paragraph on the www.mathworks.com website.

Construct URL Object

Call a java.net.URL constructor to create object url pointing to the MathWorks website.

url = java.net.URL('https://www.mathworks.com');

Open Connection to URL

Call the openStream method to establish a connection with the website. The method creates an InputStream object is for reading bytes from the site.

is = openStream(url);

Set Up Buffered Stream Reader

Create a buffered stream reader isr for reading characters using the java.io.InputStreamReader constructor. Create a buffered reader object br for efficient reading of characters, arrays, and lines.

isr = java.io.InputStreamReader(is);
br = java.io.BufferedReader(isr);

Read Lines of Text

Read lines of HTML text from the website which are within the first paragraph tag '<p>'. The BufferedReader method readLine reads a line of text which is terminated by a carriage return and/or line feed character.

p1 = java.lang.String('<p>');
p2 = java.lang.String('</p>');
s = readLine(br);
while ~(s.startsWith(p1))
    s = readLine(br);
end

Display Text

disp(s.substring(p1.length,s.length-p2.length))

<i>Accelerating the pace of engineering and science</i>

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