Generic
Generic 1, the ArrayList Generics
Public class ArrayListGenericDemo public static void main (String [] args) ArrayList <String> data = new ArrayList <String> ();
Data.add ( "hello");
Data.add ( "goodbye");
/ / Data.add (new Date ()); This won't compile!
Iterator <String> it data.iterator = ();
While (it.hasNext ()) String s = it.next ();
System.out.println (s);
)
)
) 2, the HashMap Generics
Public class ArrayListGenericDemo public static void main (String [] args) ArrayList <String> data = new ArrayList <String> ();
Data.add ( "hello");
Data.add ( "goodbye");
/ / Data.add (new Date ()); This won't compile!
Iterator <String> it data.iterator = ();
While (it.hasNext ()) String s = it.next ();
System.out.println (s);
)
)
) Posted on 2007-07-16 11:07 Aaronbamoo Reading (13) Comments (0) edit collections cited
