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.
NOTE: Provided method should be run on a local machine and not on an online compiler.
Output by this method will be 0 if the internet is connected and it will be 1 if the internet is not connected.
If Internet is not connected it will throw an exception and catch will execute printing respective message.
Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.