Re: Any form of operator overloading supported in java?

From:

Lew <lew@nospam.lewscanon.com>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 17 Mar 2007 17:34:37 -0400

Message-ID:

<ndSdnWBo_Phzw2HYnZ2dnUVZ_hOdnZ2d@comcast.com>

Patricia Shanahan wrote:

public class SideEffect {
public static void main(String[] args) {

SideEffect

o = new SideEffect(); // changed from original post

System.out.print("Hello, ");

     System.out.println( o ); // + overload not involved

     Collection< SideEffect > stuff = new HashSet< SideEffect > ();
     stuff.add( o ); // this really makes a hash of things

    String someString = "X" + o;
    System.out.println("World");
  }
  public String toString(){
    System.exit(3);
    return null;
  }

     public int hashCode()
     {
       System.exit(4);
       return super.hashCode();
     }

}

toString does overload part of the functionality of "+", the string
conversion step when one operand is a string and the other is a
reference expression.

A similar issue pertains anywhere one overrides a method that is often used by
the standard API. System.out.println( o ) as above shows that. You would
certainly surprise some Collections if you put a System.exit() call in hashCode().

-- Lew