extends object

[yytan]

hi there;

i think i got confuse again.

i dun get clear when java extends object, wat it does and which object it is inherit from since the class never specific wat is the class it will exteds.

pls help

rgd/ yoke yew

 

[sedj]

Have you got a specific example you are having problems with ?

--------------------------------------------------
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http://www.primrose.org.uk

 

[yytan]

hi sedj;

example:

public class TraceWriter extends Object {
  /**
   * Members
   */
  short DBGLVL = 0;
  String PgmName = "DEFAULT";
  private DatagramSocket socket;

...
...

  public TraceWriter(String path) {
    setPropertyPath(path);
    try {
      socket = new DatagramSocket();
      address = InetAddress.getByName(HOST_NAME);
    } catch (SocketException e) {
      System.err.println("Error in opening Datagram socket: ");
      System.err.println(e.getMessage());
    } catch (UnknownHostException e) {
      System.err.println("Error in getByName(): ");
      System.err.println(e.getMessage());
    }
  }

i dun understand why this class TraceWriter need to extends object.

rgd/ yoke yew

 

[sedj]

The TraceWriter class has absolutely no need to extend Object at all, because ALL classes automatically *extend* the Object class (the compiler does this for you basically). This means that all objects have the methods available to them that are in the base Object class (such as toString() etc).

Its just bad programming to extend Object explicitly as it serves no purpose whatsover !

--------------------------------------------------
Free Database Connection Pooling Software

http://www.primrose.org.uk

 

[yytan]

dear sedj;

10s for ur info. i am doing with diff prog lang all the time, tends to forget the fundamental 1.

rgd/ yoke yew