How To Generate Random IP Address Using JAVA ?

Today I'll Show You How To Generate Random IP Address...

But First Why I Want This...Right...?

Ans : If You Want Test Your Code That Whether It Is Recognizing The Machine By It’s IP Address Then You Had To Use This Code To Generate Random IP Address.

So Here We Goooo....

private String generateIPAddress(int p1, int p2, int p3) {

    StringBuilder sb = null;

Random r1 = new Random();
    Random r2 = new Random();
 Random r3 = new Random();
 Random r4 = new Random();



    String ip1 = Integer.toString(b1);
    String ip2 = Integer.toString(b2);
    String ip3 = Integer.toString(b3);
    String ip4 = Integer.toString(b4);
    
    String b1 = IpConverter.longToIp(r1.nextLong());
    String b2 = IpConverter.longToIp(r2.nextLong());
    String b3 = IpConverter.longToIp(r3.nextLong());
    String b4 = IpConverter.longToIp(r4.nextLong());

    //Now the IP is b1.b2.b3.b4
    sb = new StringBuilder();
    sb.append(ip1).append(".").append(ip2).append(".").append(ip3).append(".").append(ip4);
    // System.out.println(sb);

    return sb.toString();

}

The Random Method is used to generate random number in java,In this case we have to generate four
hence

Random r1 = new Random();
    Random r2 = new Random();
 Random r3 = new Random();
 Random r4 = new Random();

We need to convert our generated number in an IP String

String ip1 = Integer.toString(b1);
    String ip2 = Integer.toString(b2);
    String ip3 = Integer.toString(b3);
    String ip4 = Integer.toString(b4);

The numbers generated may be higher than 255 hence we use String to IP converter which keeps the value 0 to 255 because the IPv4 has the limit of 0 to 255 only .

String b1 = IpConverter.longToIp(r1.nextLong());
    String b2 = IpConverter.longToIp(r2.nextLong());
    String b3 = IpConverter.longToIp(r3.nextLong());
    String b4 = IpConverter.longToIp(r4.nextLong());

Now we Append the converted individual string and return it as the single IP address

sb = new StringBuilder();
    sb.append(ip1).append(".").append(ip2).append(".").append(ip3).append(".").append(ip4);
    return sb.toString();
And You Have Done :)