How to execute bash shell command and get result in Java

Java is a very powerful programming language. But it's more powerful when combine Java with Bash.

First. import necessary library.

import java.io.BufferedReader;
import java.io.InputStreamReader;

Second.

String cmd = "nslookup -type=any "+str;
Process proc = Runtime.getRuntime().exec(cmd);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(proc.getInputStream()));
StringBuilder result = new StringBuilder();
String s = null;
while ((s = stdInput.readLine()) != null)
{
    result = result.append(s).append('\n');
}

Result:
example 1, execute "ping google.com":

PING google.com (173.194.202.139) 56(84) bytes of data.
64 bytes from pf-in-f139.1e100.net (173.194.202.139): icmp_seq=1 ttl=53 time=0.663 ms
64 bytes from pf-in-f139.1e100.net (173.194.202.139): icmp_seq=2 ttl=53 time=0.259 ms
64 bytes from pf-in-f139.1e100.net (173.194.202.139): icmp_seq=3 ttl=53 time=0.253 ms
64 bytes from pf-in-f139.1e100.net (173.194.202.139): icmp_seq=4 ttl=53 time=0.344 ms

--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3040ms
rtt min/avg/max/mdev = 0.253/0.379/0.663/0.169 ms

online portal: https://myipaddress.pro/ping

example 2, execute "nslookup -type=any google.com"

Server: 127.0.0.53
Address: 127.0.0.53#53

Non-authoritative answer:
Name: google.com
Address: 173.194.202.113
Name: google.com
Address: 173.194.202.101
Name: google.com
Address: 173.194.202.100
Name: google.com
Address: 173.194.202.139
Name: google.com
Address: 173.194.202.138
Name: google.com
Address: 173.194.202.102
Name: google.com
Address: 2607:f8b0:400e:c00::65
google.com nameserver = ns3.google.com.
google.com nameserver = ns2.google.com.
google.com nameserver = ns1.google.com.
google.com mail exchanger = 20 alt1.aspmx.l.google.com.
google.com text = "docusign=05958488-4752-4ef2-95eb-aa7ba8a3bd0e"
google.com text = "v=spf1 include:_spf.google.com ~all"
google.com mail exchanger = 40 alt3.aspmx.l.google.com.
google.com rdata_257 = 0 issue "pki.goog"
google.com nameserver = ns4.google.com.
google.com mail exchanger = 10 aspmx.l.google.com.
google.com
origin = ns1.google.com
mail addr = dns-admin.google.com
serial = 196121370
refresh = 900
retry = 900
expire = 1800
minimum = 60
google.com mail exchanger = 50 alt4.aspmx.l.google.com.

Authoritative answers can be found from:
online portal: https://myipaddress.pro/nslookup

example 3, execute "traceroute facebook.com"

traceroute to facebook.com (157.240.22.35), 30 hops max, 60 byte packets
 1  108.170.242.249 (108.170.242.249)  18.725 ms 108.170.242.233 (108.170.242.233)  18.685 ms  28.299 ms
 2  * * *
 3  po131.asw01.sjc1.tfbnw.net (157.240.32.28)  19.409 ms  26.368 ms po131.asw03.sjc1.tfbnw.net (157.240.32.32)  19.391 ms
 4  po215.psw02.sjc3.tfbnw.net (157.240.47.223)  19.634 ms po244.psw04.sjc3.tfbnw.net (157.240.48.33)  19.869 ms po214.psw04.sjc3.tfbnw.net (157.240.48.27)  19.940 ms
 5  173.252.67.3 (173.252.67.3)  19.516 ms 173.252.67.61 (173.252.67.61)  19.579 ms 173.252.67.83 (173.252.67.83)  19.676 ms
 6  edge-star-mini-shv-01-sjc3.facebook.com (157.240.22.35)  19.353 ms  23.683 ms  19.263 ms

online portal: https://myipaddress.pro/traceroute