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() );
	}
}