AP® Computer Science A glossary

Object class

Also called: Object

Course: AP® Computer Science A Shows up in: Unit 1: Using Objects and Methods

The class at the top of every Java class hierarchy: all classes are subclasses of Object.

Appears in the course and exam description (CED): 1.12.A.31.15.A.5

Because every class is a subclass of Object, every object can use the behaviors Object defines, such as toString.

public class Coin
{
}

// in main
Coin c = new Coin();
System.out.println(c.equals(c));

Output:

true

Related terms

• Superclass and subclass
• Inheritance
• Method overriding