JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to connect to a URL and read its content in Java?


Description:

You can read content of an URL object aftter connecting to it. You have to call the URL's openStream() method to get a stream from which you can read the contents of the URL. The openStream() method returns a java.io.InputStream object, so reading from a URL is as easy as reading from an input stream. Below example shows sample code:


Code:
package com.myjava.url;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

public class MyUrlContentRead {

    public static void main(String a[]){
    
        URL url = null;
        InputStream is = null;
        try {
            url = new URL("http://www.java2novice.com");
            is = url.openStream();
            byte[] b = new byte[8];
            while(is.read(b) != -1){
                System.out.print(new String(b));
            }
        }  catch (MalformedURLException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}
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List Of All Networking Examples:

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  2. How to create File URL object?
  3. How to create URL object with all properties?
  4. How to get URL properties?
  5. How to get URL object with relative path?
  6. How to compare two URL objects path?
  7. How to read URL content?
  8. How to encode URL content?
  9. How to decode URL content?
  10. How to get my machine IP address?
  11. How to get IP address of a host?
  12. How to get host name by IP address?
  13. How to get machine host name?
  14. How to get all IP addresses of a host?
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Knowledge Centre
doPost Vs doGet methods
doGet() method is used to get information, while doPost() method is used for posting information. doGet() requests can't send large amount of information and is limited to 240-255 characters. However, doPost()requests passes all of its data, of unlimited length. A doGet() request is appended to the request URL in a query string and this allows the exchange is visible to the client, whereas a doPost() request passes directly over the socket connection as part of its HTTP request body and the exchange are invisible to the client.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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