Java Tutorial: Java Runtime class (exec(String[] cmdarray) method) ~ foundjava

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RuntimeDemo.java

import java.io.IOException;

/*
 * public Process exec(String[] cmdarray) throws
 *                                      IOException
 * 
 * Parameters: 
 * -----------
 * 
 * cmdarray - array containing the command to call and
 * its arguments.
 */
public class RuntimeDemo
{

    public static void main(String[] args) throws IOException
    {

        String[] cmdArray = new String[2];

        cmdArray[0] = "notepad.exe";
        cmdArray[1] = "Hello.txt";

        System.out.println("Executing notepad.exe and opening Hello.txt");

        /*
         * Returns the runtime object associated with the
         * current Java application.
         */
        Runtime runtime = Runtime.getRuntime();

        /*
         * Executes the specified command and arguments in a
         * separate process.
         * 
         * Returns: A new Process object for managing the
         * subprocess
         */
        Process process = runtime.exec(cmdArray);

        System.out.println("is process alive = " + process.isAlive());
        System.out.println(cmdArray[1] + " should now open.");
    }

}

Output

Executing notepad.exe and opening Hello.txt
is process alive = true
Hello.txt should now open.

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