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    Run System Command from Java Program

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    In this tutorial, we will discuss how to run a system command from a Java program.

    If you want to check list of processes on your system and you are an Unix user, you will definitely use ps -ef command. In the following program, we will run the command from Java program.

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    package com.t4b.test;
    import java.io.*;
    public class JavaRunCommand {
    public static void main(String args[]) {
    String s = null;
    try {
    Process p = Runtime.getRuntime().exec("ps -ef");
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    Retrieve System Information

    To retrieve system information you may try the following code.


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    package com.t4b.test;
    import java.lang.management.ManagementFactory;
    import java.lang.management.RuntimeMXBean;
    import java.util.Map;
    import java.util.Set;
    public class SystemInfo {
    public static void main(String[] args) {
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    Check IP Address

    If you want to check IP address of your local machine try the following code.


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    package com.t4b.test;
    import java.net.InetAddress;
    class IPAddress
    {
    public static void main(String args[]) throws Exception
    {
    System.out.println(InetAddress.getLocalHost());
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    Open Notepad

    If you want to open an applicatication using Java program, you may try the following.


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    package com.t4b.test;
    import java.util.*;
    import java.io.*;
    class Notepad {
    public static void main(String[] args) {
    Runtime rs = Runtime.getRuntime();
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    Now, you may think that why are we going to write a complex code, where we can directly run those commands on terminal?

    Here, the answer is: sometimes a program needs to be executed by some other program whithout human intervension. Thus this technique is used to automate the system.


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    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX


    Happy Exploring!

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