public class Exec {

    public static void main(String[] args) {
        
        try{
            Process p=Runtime.getRuntime().exec("mspaint");
            p.waitFor();
         }catch(Exception e){
         }
    }
}

public class Exec {

    public static void main(String[] args) {
        
        try{
                Process p=Runtime.getRuntime().exec
("c:\\Program Files\\MicrosoftOffice\\office\\winword.exe d:\\a.doc");
          p.waitFor();
         }catch(Exception e){
         }
    }
}