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From: markspace <-@.>
Newsgroups: comp.lang.java.programmer
Subject: Re: Synchronization of the constructor
Date: Sun, 14 Aug 2011 07:51:48 -0700
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On 8/14/2011 7:42 AM, markspace wrote:
>   public class Stooges {
>
>     private final ArrayList stooges;
>
>     public Stooges() {
>       ArrayList temp = new ArrayList(3);
>       temp.add( "Larry" );
>       temp.add( "Moe" );
>       temp.add( "Curly" );
>       stooges = temp;
>     }
>     public List getStooges() {
>       return new ArrayList( stooges );
>     }
> }

I want to make one small change here.  The above is correct, but 
misleading.  Both of the following are also immutable and thread safe:


  public class Stooges {

      private final ArrayList stooges;

      public Stooges() {
        ArrayList stooges = new ArrayList(3);
        stooges.add( "Larry" );
        stooges.add( "Moe" );
        stooges.add( "Curly" );
      }
      public List getStooges() {
        return new ArrayList( stooges );
      }
}


-- or --

  public class Stooges {

      private final ArrayList stooges = new ArrayList(3);

      public Stooges() {
        stooges.add( "Larry" );
        stooges.add( "Moe" );
        stooges.add( "Curly" );
      }
      public List getStooges() {
        return new ArrayList( stooges );
      }
}