What is the parent class of all classes in Java?

Key points

• The Object class is the root class in Java's class hierarchy.
• All classes in Java are subclasses of Object.
• This inheritance allows for common methods like toString() and equals() to be available in all Java classes.

Related questions

• What is the output of the following code? ```java Integer a = 127; Integer b = 127; Integer c = 128; Integer d = 128; System.out.println(a == b); System.out.println(c == d); ```
• What does the `super` keyword refer to in Java?
• Which method is used to find the length of a String in Java?
• What is the difference between `==` and `.equals()` when comparing String objects in Java?
• What is the difference between `ExecutorService.submit()` and `ExecutorService.execute()` in Java?
• What is the output of `System.out.println("Hello" + 1 + 2)`?