Share a stack class with generics in Java programming ideas

I think the author has written too well and I have to add it to my favorites.

Understanding of this example:

// The type parameter cannot use the basic type. T and U are actually of the same type.

// Each time new data is put into a new top, the original top is pressed down to a level, and a link is established through the pointer.

// The endpoint is a node created by the default constructor that matches the end () and returns true.

Copy codeThe Code is as follows:

//: Generics/consumer stack. java
// A stack implemented with an internal linked structure.
Package generics; public class secure stack <T> {
Private static class Node <U> {
U item;
Node <U> next;
Node () {item = null; next = null ;}
Node (U item, Node <U> next ){
This. item = item;
This. next = next;
}
Boolean end () {return item = null & next = null ;}
}
Private Node <T> top = new Node <T> (); // End sentinel
Public void push (T item ){
Top = new Node <T> (item, top );
}
Public T pop (){
T result = top. item;
If (! Top. end ())
Top = top. next;
Return result;
}
Public static void main (String [] args ){
Consumer stack <String> lss = new consumer stack <String> ();
For (String s: "Phasers on stun! ". Split (""))
Lss. push (s );
String ss;
While (ss = lss. pop ())! = Null)
System. out. println (ss );
// ----- If put integer into the specified list
Consumer stack <Integer> lii = new consumer stack <Integer> ();
For (Integer I = 0; I <10; I ++ ){
Lii. push (I );
}
Integer end;
While (end = lii. pop ())! = Null)
System. out. println (end );
// ----- Integer test end!
}


}
/* Output:
Stun!
On
Phasers
*/