Change Computer IP address using JAVA

Question

I need to change computer IP address using java... I have tried this one but this doesnot work...

    String str1="192.168.0.201"; 
    String str2="255.255.255.0";
    String[] command1 = { "netsh", "interface", "ip", "set", "address",
    "name=", "Local Area Connection" ,"source=static", "addr=",str1,
    "mask=", str2};
    Process pp = java.lang.Runtime.getRuntime().exec(command1);

any errors? Do you have permission? Does it work from the command line? — Scary Wombat, Oct 07 '14 at 08:00
@ZulkernainTasin what do you expect this code to do? This would change your local machine (ethernet) address. If you think that this would change your external IP address you're wrong. — Alboz, Oct 07 '14 at 08:08
no sir.. i dnt want that :p i need local change... but its not happening.. :( — Zulkernain Tasin, Oct 12 '14 at 16:54

score 2 · Answer 1 · answered Oct 07 '14 at 08:00

2

You (probably) need to correctly concatenate those key=value arguments - as written they'll be treated as separate arguments, i.e.

{..., "addr1=" + str1, "mask=" + str2 };

answered Oct 07 '14 at 08:00

Alnitak

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do the same with `name=\"Local Area Connection\"` – Alnitak Oct 07 '14 at 08:14

score 1 · Answer 2 · answered Oct 07 '14 at 08:05

Have you tried this?

String[] command1 = { "netsh", "interface", "ip", "set", "address",
"name=\"Local Area Connection\"" ,"source=static", "addr="+str1,
"mask="+str2};

Note that now the arguments after the = are not separated by spaces. Also note the double quotation marks sourrounding Local Area Connection.

If this doesnt work either, try enclosing Local Area Connection in single quotation marks like this:

"name='Local Area Connection'"

score 1 · Answer 3 · edited Sep 28 '19 at 21:05

1

make sure of the name of your interface

use netsh interface ipv4 show config in cmd to check the name of your connection

edited Sep 28 '19 at 21:05

George Z.

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answered Sep 28 '19 at 20:10

shehab khalid

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score 0 · Answer 4 · edited Nov 19 '15 at 15:10

I tested out the code you posted, and here is the error I got

Exception in thread "main" java.lang.Error: Unresolved compilation problem: Unhandled exception type IOException

at DaysinaMonth.main(DaysinaMonth.java:9)

the error was found on this line:

Process pp = java.lang.Runtime.getRuntime().exec(command1);

I have no suggestions for fixing this, but I can say that looking at the code provided, the runtime seems to be useless unless used to form a loop, but since you didn't make the IP set as a randomly generated number, that would have no reason to be done.

score 0 · Answer 5 · edited Nov 19 '15 at 14:53

public class DaysinaMonth {
    public static void main(String[] args) throws Throwable{
        String str1="192.168.0.201"; 
        String str2="255.255.255.0";
        String[] command1 = { "netsh", "interface", "ip", "set", "address",
        "name=", "Local Area Connection" ,"source=static", "addr=",str1,
        "mask=", str2};
        Process pp = java.lang.Runtime.getRuntime().exec(command1);
        System.out.print( pp);
    }
}

This seems to work, but the returns are strange: java.lang.ProcessImpl@659e0bfd

no errors are found and my ip has been altered, but not in an expected way.

score 0 · Answer 6 · answered Dec 21 '22 at 07:11

I wrote a library with JNA (Java 17) can do this , I hope anybody help me for improvements .
Note: Currently support Linux OS.
JSysBox

Current Features :

Networking :
1. list available interfaces
2. Set/Get interaface ip address
3. Interface statistics
4. IfUp/IfDown
5. Add/Delete/List routes (specific method to set default gateway)
FileSystem:
1. Mount/Umount/MountPoints Filesystems
2. Set/Get system environments
3. Set/Get hostname
Date and Time
1. Set/Get system time zone
2. Set/Get system date and time
3. Sync system to hardware clock (like: hwclock --systohc)
4. Sync hardware to system clock (like: hwclock --hctosys)

Change Computer IP address using JAVA

6 Answers6

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