- Java Basic Programs
- Java Programming Examples
- Java Print Hello World
- Java Get Input from User
- Java Print Integer
- Java Add two Numbers
- Java Check Even or Odd
- Java Check Prime or Not
- Java Check Alphabet or Not
- Java Check Vowel or Not
- Check Reverse equal Original
- Java Fahrenheit to Celsius
- Java Celsius to Fahrenheit
- Java Perfect Number Program
- Java Find Quotient Remainder
- Java Days to Seconds
- Java Count Digits in Number
- Java Binary Number Addition
- Java Discount Program
- Java Compute Courier Charge
- Java Find Telephone Bill
- Java Print ASCII Values
- Java Check Palindrome or Not
- Java Check Armstrong or Not
- Generate Armstrong Numbers
- Add two Numbers using Pointers
- Java Mathematical Programs
- Add Subtract Multiply & Divide
- Java Make Calculator
- Java Add Digits of Number
- Java Check Leap Year or Not
- Java Check Divisibility
- Java Find Simple Interest
- Java Find Compound Interest
- Java Print Fibonacci Series
- Java Find nCr nPr
- Calculate Average & Percentage
- Java Calculate Arithmetic Mean
- Java Calculate Student Grade
- Java Print Table of Number
- Java Print Prime Numbers
- Java Add n Numbers
- Java Interchange two Numbers
- Java Reverse Numbers
- Java Swap two Numbers
- Count Positive Negative & Zero
- Find Largest of two Numbers
- Find Largest of three Numbers
- Java Find Factorial of Number
- Java Find HCF & LCM
- Area & Perimeter of Square
- Area & Perimeter of Rectangle
- Area & Circumference of Circle
- Java Conversion Programs
- Java Decimal to Binary
- Java Decimal to Octal
- Java Decimal to Hexadecimal
- Java Binary to Decimal
- Java Binary to Octal
- Java Binary to Hexadecimal
- Java Octal to Decimal
- Java Octal to Binary
- Java Octal to Hexadecimal
- Java Hexadecimal to Decimal
- Java Hexadecimal to Binary
- Java Hexadecimal to Octal
- Java Pattern Programs
- Java Pattern of Stars
- Java Pattern of Alphabets
- Java Pattern of Numbers
- Java Pyramid of Stars
- Java Pyramid of Alphabets
- Java Pyramid of Numbers
- Java Print Diamond Pattern
- Java Print Floyd Triangle
- Java Print Pascal Triangle
- Java Array Programs
- One Dimensional Array Program
- Java Linear Search
- Java Binary Search
- Find Largest Element in Array
- Find Smallest Element in Array
- Java Reverse Array
- Insert Element in Array
- Delete Element from Array
- Java Merge two Array
- Java Bubble Sort
- Java Selection Sort
- Java Insertion Sort
- Java Find Common Elements
- Java Count Even/Odd Number
- Two Dimensional Array Program
- Java Add two Matrices
- Java Subtract two Matrices
- Java Transpose Matrix
- Multiply two Matrices
- Three Dimension Array Program
- Java String Programs
- Java Print String
- Find Length of String
- Java Compare two String
- Java Copy String
- Java Concatenate String
- Java Reverse String
- Delete Vowels from String
- Delete Words from Sentence
- Find Occurrence of a Character
- Java Find Occurrence of a Word
- Occurrence of Each Character
- Java Occurrence of Each Word
- Java Count Repeated Characters
- Java Count Repeated Words
- Java Capitalize Each Word
- Java Count Vowels/Consonants
- Java Extract Numbers
- Java Count Word in String
- Remove Spaces from String
- Java Sort a String
- Java Uppercase to Lowercase
- Java Lowercase to Uppercase
- Java Swap two Strings
- Java Check Anagram or Not
- Java Check Balance Parentheses
- Java Check Password Strength
- Java File Programs
- Java Read File
- Java Write to File
- Read & Display File Content
- Java Copy File
- Java Append Text to File
- Java Merge two File
- List files in Directory
- Java Delete File
- Java Miscellaneous Programs
- Generate Random Numbers
- Java Print Time & Date
- Java Get IP Address
- Java Shutdown Computer
- Java Programming Tutorial
- Java Tutorial
Java Program to Get IP Address
This article covers multiple programs in Java that find and prints IP address. Here are the list of programs covered by this article:
- Find and print local IP address using Java
- Find and print public IP address using Java
- Find and print both local and public (external) IP address using Java
Find and Print Local IP Address in Java
The question is, write a Java program to print the local IP address of a computer system. The program given below is its answer:
import java.net.InetAddress; public class CodesCracker { public static void main(String[] args) { try { InetAddress ip = InetAddress.getLocalHost(); System.out.println("IP Address = " +ip.getHostAddress()); } catch(Exception e) { System.out.println("Exception: " +e); } } }
The snapshot given below shows the sample output produced by above Java program:
Code executed on local system, will print local IP. But no worry, other options are also available to find the public IP. Let's see how, in the section given below.
Find and Print Public IP Address in Java
To check your public IP address, you need to visit any website that shows your system's public IP address. For example, amazonaws shows the IP address of your computer system. And of course, that will be your public IP address. To see, open your browser, and type checkip.amazonaws.com. You'll get your public IPv4 address.
There are a lot of websites, from where you can find your public IP, but since Amazon is trusted one, therefore I've used their URL.
Now, I'm going to use this web address in my Java program to get the value generated by this URL for my system. And that value will get printed on the output, to show the public IPv4 address:
import java.net.*; import java.io.*; public class CodesCracker { public static void main(String[] args) { try { URL ip = new URL("https://checkip.amazonaws.com"); BufferedReader br = new BufferedReader(new InputStreamReader(ip.openStream())); String pip = br.readLine(); System.out.println("Public/External IP Address = " +pip); } catch(Exception e) { System.out.println("Exception: " +e); } } }
Here is its sample output:
In your case, the output will be different.
Find Local and Public IP Address using Java
This is the combined version of previous program. This program prints both local and public IP address of a computer system.
import java.net.*; import java.io.*; public class CodesCracker { public static void main(String[] args) { try { InetAddress localhost = InetAddress.getLocalHost(); System.out.println("Local IP Address = " +localhost.getHostAddress()); } catch(Exception e) { System.out.println("Exception: " +e); } try { URL ipfinder = new URL("https://checkip.amazonaws.com"); BufferedReader br = new BufferedReader(new InputStreamReader(ipfinder.openStream())); String publicIP = br.readLine(); System.out.println("Public IP Address = " +publicIP); } catch(Exception e) { System.out.println("Exception: " +e); } } }
The sample output produced by above program is shown in the snapshot given below:
Same Program in Other Languages
« Previous Program Next Program »