This week's book giveaway is in the Servlets forum.
We're giving away four copies of Murach's Java Servlets and JSP and have Joel Murach on-line!
See this thread for details.
The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes print(this)??? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Murach's Java Servlets and JSP this week in the Servlets forum!
JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
Bookmark "print(this)???" Watch "print(this)???" New topic
Author

print(this)???

chao-long liao
Ranch Hand

Joined: Jul 29, 2001
Posts: 78
public class Test {
public static void main (String args []) {
new Test();
}
public Test () {
System.out.println(this);
}
}
output: Test@affc70
why no error?
What's the meaning about printing the class itself?
thanks for help
Paul Villangca
Ranch Hand

Joined: Jun 04, 2002
Posts: 133
The Object class has a toString() method, which is inherited by all its subclasses (which means all classes), unless overriden.
What you see printed out is the default toString() method, which shows the class name and its hashcode. Kinda useless, though, so you might wanna override the toString() method in your class.
chao-long liao
Ranch Hand

Joined: Jul 29, 2001
Posts: 78
Thanks for help.
 
Don't get me started about those stupid light bulbs.
 
subject: print(this)???
 
Similar Threads
Object of Class N declared inside Class N itself.
super.clone()
Forgetting about constructors
Constructor of a constructor
Cannot get simple java file to run