KwickClips Java · 42 sec · free
Who is the parent of a class with no extends?
Short answer. Object, the root class of every Java class.
Why override toString()?
So printing the object shows useful text instead of a class name and a code.
The Object class
| Method | Gives |
|---|---|
| toString() | object as text |
| equals() | same or not |
| getClass() | its class |
Remember
| Object is the root class |
| Override toString() |
You never wrote extends. So who is the parent? Every class extends Object. To String gives text. Equals compares objects. Get Class names the class. Remember. Object is the root class. Override to String to print nicely.
This clip is from the full lesson: Abstract Classes, Interfaces and Polymorphism — 8 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: ICSE Class 9 Computer Applications, ICSE Class 9 Computer Applications, ICSE Class 10 Computer Applications, ISC Class 12 Computer Science (868)
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