RunTimeクラス、プログラムを自動的に開き、プログラムを閉じる

public class T1 {
	public static void main(String[] args) {

		Runtime runtime = Runtime.getRuntime();
		Process process=null;

		try {
			process= runtime.exec("notepad.exe");//       ,        
		} catch (IOException e) {
			e.printStackTrace();
		}
		try {
			Thread.sleep(3000);//3       
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		process.destroy();//     
	}
}