Factory Pattern

• This pattern is used when it must be decided at run time which one of several compatible classes is to be instantiated.
• For example, the abstract Collator class's getInstance() method returns a collation object that is appropriate for the default locale, as determined by java.util.Locale.getDefault():
• Like other locale-sensitive classes, you can use the static factory method, getInstance, to obtain the appropriate Collator object for a given locale. 
• The following example shows how to compare two strings using the Collator for the default locale.
• Compare two strings in the default locale
  • Collator myCollator = Collator.getInstance();
  • if( myCollator.compare("abc", "ABC") < 0 )
  • System.out.println("abc is less than ABC");
  • else
  • System.out.println("abc is greater than or equal to ABC");