Declaring a LinkedList in Java

Question

I always learn when we declare a collection we should do, Interface ob = new Class(), if i want to use for example a LinkedList i\'ll do List ob = new LinkedL

Answer 1

I won't always suggest you to use generics ..... Coz sometimes you may need to wrap different objects as here....

          String str="a string";
          boolean status=false;

          LinkedList ll = new LinkedList();
          ll.add(str);
          ll.add(status);

In some situations like case of RMI, u can only send serialized data.....and suppose you want to send a class object(which is unserialized).......There you can wrap the members of the class(primitives) in a LinkedList and pass that object as a whole.......not worrying about the huge number of arguments...... Consider for eg:

       public Class DataHouse
       {
             public int a;
             public String str;
             .
             .
             .
       }

Now Somewhere u need to pass the objects.... You can do the following....

             DataHouse dh =new DataHouse();
             LinkedList ll = new LinkedList();
             ll.add(dh.a);
             ll.add(dh.str);

             // Now the content is serialized and can pass it as a capsuled data......