Checking Internet Connectivity using Java
Checking Internet connectivity using Java can be done using 2 methods:
1) by using getRuntime() method of java Runtime class.
2) by using methods of java URL and URLConnection classes.
#Java Runtime Class:This class is used to interact with java runtime environment (Java virtual machine) in which the application is running. It provides methods/functions to execute a process or a command, invoke garbage collector, get total and free memory in the JVM etc.
#getRuntime():This method of java runtime class returns the runtime object associated with the current java application.
you can learn more about this class here
#Java URL Class:This class provides methods that returns various information like protocol, hostname, file Name, port Number etc of the URL.
#Java URLConnection class:It represents a link between URL and application and can be used to read and write data to the specified resource referred by the URL.
#openConnection():This method of java URLConnection class opens the connection to the specified URL.
you can learn more about these classes here and here
NOTE: Provided method should be run on a local machine and not on an online compiler.
METHOD 1:
Output by this method will be 0 if the internet is connected and it will be 1 if the internet is not connected.
import java.util.*;
import java.io.*;
class checking_internet_connectivity {
public static void main(String args[]) throws Exception
{
Process process = java.lang.Runtime.getRuntime().exec( "ping www.geeksforgeeks.org" );
int x = process.waitFor();
if (x == 0 ) {
System.out.println( "Connection Successful, "
+ "Output was " + x);
}
else {
System.out.println( "Internet Not Connected, "
+ "Output was " + x);
}
}
}
|
OUTPUT:
METHOD 2:
If Internet is not connected it will throw an exception and catch will execute printing respective message.
import java.util.*;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
class checking_internet_connectivity {
public static void main(String args[])
{
try {
URLConnection connection = url.openConnection();
connection.connect();
System.out.println( "Connection Successful" );
}
catch (Exception e) {
System.out.println( "Internet Not Connected" );
}
}
}
|
OUTPUT:
Last Updated :
30 May, 2018
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