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){
         }
    }
}