Find the IP address of the local machine

// Example 4.6

import java.net.*;

class MyAddress6 {

  public static void main (String args[]) {

    try {
      InetAddress thisComputer = InetAddress.getLocalHost();
      byte[] address = thisComputer.getAddress();
      System.out.print("My address is ");
      for (int i = 0; i < address.length; i++) {
        int unsignedByte = address[i] < 0 ? address[i] + 256 : address[i];
        System.out.print(unsignedByte + ".");
      }
      System.out.println();
    }
    catch (UnknownHostException e) {
      System.out.println("I'm sorry. I don't know my own address.");
    }

  }

}

Find the hostname of the local machine

import java.net.*;

class myName {

  public static void main (String args[]) {

    try {
      InetAddress address = InetAddress.getLocalHost();
      System.out.println("Hello. My name is " +  address.getHostName());
    }
    catch (UnknownHostException e) {
      System.out.println("I'm sorry. I don't know my own name.");
    }

  }

}

Find the address of the local machine

import java.net.*;

class myAddress {

  public static void main (String args[]) {

    try {
      InetAddress address = InetAddress.getLocalHost();
      System.out.println(address);
    }
    catch (UnknownHostException e) {
      System.out.println("Could not find this computer's address.");
    }

  }

}

: A program that prints all the addresses of www.apple.com

import java.net.*;

class apple {

  public static void main (String args[]) {

    try {
      InetAddress[] addresses = InetAddress.getAllByName("www.apple.com");
      for (int i = 0; i < addresses.length; i++) {
        System.out.println(addresses[i]);
      }
    }
    catch (UnknownHostException e) {
      System.out.println("Could not find www.apple.com");
    }

  }

}

A program that prints the address of 72.167.232.155

import java.net.*;

class MyHostName{

  public static void main (String args[]) {

    try {
      InetAddress address = InetAddress.getByName("72.167.232.155");
      System.out.println(address.getHostName());
    }
    catch (UnknownHostException e) {
      System.out.println("Could not find 72.167.232.155");
    }

  }

}

A program that prints the address of www.oreilly.com

import java.net.*;

class oreilly {

  public static void main (String args[]) {

    try {
      InetAddress address = InetAddress.getByName("www.oreilly.com");
      System.out.println(address);
    }
    catch (UnknownHostException e) {
      System.out.println("Could not find www.oreilly.com");
    }

  }

}