Source Code : Pre generics example that uses a collection.

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Pre generics example that uses a collection.

   
/*
Java 2, v5.0 (Tiger) New Features
by Herbert Schildt
ISBN: 0072258543
Publisher: McGraw-Hill/Osborne, 2004
*/
 
import java.util.*; 
 
public class OldStyle {  
  public static void main(String args[]) { 
    ArrayList list = new ArrayList(); 
 
    // These lines store strings, but any type of object 
    // can be stored.  In old-style code, there is no  
    // convenient way restrict the type of objects stored 
    // in a collection 
    list.add("one"); 
    list.add("two"); 
    list.add("three"); 
    list.add("four"); 
 
    Iterator itr = list.iterator(); 
    while(itr.hasNext()) { 
 
      // To retrieve an element, an explicit type cast is needed 
      // because the collection stores only Object. 
      String str = (String) itr.next(); // explicit cast needed here. 
 
      System.out.println(str + " is " + str.length() + " chars long."); 
    } 
  }  
}


           
         
    
    
  

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