Find Whether an IP Address Is in the Specified Range or Not in Java

Find Whether an IP Address Is in the Specified Range or Not in Java

Introduction

Java is a powerful programming language and is widely used in many different applications. One common task that developers need to do is to check if an IP address is in a given range. To do this, you'll need to use a combination of Java and networking libraries to identify and compare the IP addresses. In this tutorial, we'll show you how to do this in Java.

Step 1: Get the IP Address

The first step is to get the IP address that you want to check. You can do this in many different ways, depending on your application. For example, you could use the InetAddress class to get the IP address from a hostname. Or you could use the NetworkInterface class to get the IP address of the local machine.

Step 2: Parse the IP Address

Once you have the IP address, you'll need to parse it into its components. An IP address consists of four numerical values, separated by dots. For example, 192.168.0.1. To parse the IP address, you can use the String.split() method, passing in the "." character as a delimiter. This will return an array of strings, each representing one of the four values.

Step 3: Compare the Values

Now that you have the IP address broken down into its individual values, you can compare them with the values from the specified range. This can be done using simple comparison operators such as greater than (>) or less than (<). If any of the values fall outside of the specified range, then the IP address does not belong to that range.

Step 4: Determine the Result

Once you have compared all of the values, you can determine whether or not the IP address is within the specified range. If all of the values are within the range, then the IP address belongs to that range. Otherwise, it does not.

Conclusion

In this tutorial, we've shown you how to check if an IP address is in a given range in Java. We've walked through the process of getting the IP address, parsing it into its components, and comparing the values against the specified range. With this knowledge, you can now implement this check in your own applications.