I'd like to conver long value to IP address, which fuction do I have to use?

[somez72]

hello.
I have a long value ,,, and
I'd like to conver it to IP address.
I can't find which function Should I use?

Could you someone help?


Have a day.

 

[Karthik]

hello.
I have a long value ,,, and
I'd like to conver it to IP address.
I can't find which function Should I use?

Could you someone help?


Have a day.

Was wondering how would you represent an IP address as long ? Perhaps
String might do. Or better even a separate data structure for it as a
group of 'short's would do.

 

[Thomas Schodt]

hello.
I have a long value ,,, and
I'd like to conver it to IP address.
I can't find which function Should I use?

Could you someone help?

An IPv4 address is 4 octets, or 32 bits.
In most C flavours that could be represented in a long.

A long in Java is 64 bits.

You are probably translating some legacy application from C to Java?

You can split your 32-bit scalar in 4 octets
with simple bit shifts and casts.
Store the 4 octets in a byte[4] array,
you can ignore the fact that byte is signed.

You can then use InetAddress.getByAddress(byte[])
to obtain an InetAddress (actually an Inet4Address).

 

[somez72]

Thanks.
what I mean was ,
Someone insert ip address to mysql DB with long format.
( for example , ip address field in mysql DB has values something
like 23455543222. )
so I need to convert it to IP address format ( xxx.yyy.zzz.ccc ) in my JAVA
application.

I'd like to know is there that kind of API, to convert to IP4 Adress in
JAVA?

Have a day.

hello.
I have a long value ,,, and
I'd like to conver it to IP address.
I can't find which function Should I use?

Could you someone help?

An IPv4 address is 4 octets, or 32 bits.
In most C flavours that could be represented in a long.

A long in Java is 64 bits.

You are probably translating some legacy application from C to Java?

You can split your 32-bit scalar in 4 octets
with simple bit shifts and casts.
Store the 4 octets in a byte[4] array,
you can ignore the fact that byte is signed.

You can then use InetAddress.getByAddress(byte[])
to obtain an InetAddress (actually an Inet4Address).

 

[Roedy Green]

I need to convert it to IP address format ( xxx.yyy.zzz.ccc ) in my JAVA
application.

I posted code for that yesterday. See
http://mindprod.com/jgloss/ip.html