import java.awt.*;
import java.awt.event.*;
public class Pc
{
public static void main(String[] args)
throws Exception
{
Process process = Runtime.getRuntime().exec( "cmd /c calc" );
Robot robot = new Robot();
robot.setAutoDelay(1000);
robot.keyPress(KeyEvent.VK_1);
robot.keyPress(KeyEvent.VK_2);
robot.keyPress(KeyEvent.VK_3);
robot.keyPress(KeyEvent.VK_4);
robot.keyPress(KeyEvent.VK_5);
robot.keyPress(KeyEvent.VK_6);
robot.keyPress(KeyEvent.VK_7);
robot.keyPress(KeyEvent.VK_8);
robot.keyPress(KeyEvent.VK_9);
robot.keyPress(KeyEvent.VK_0);
System.out.println( "\nReturn code: " + process.waitFor() );
}
}