What is a default constructor?

Default constructor — is a constructor that is automatically generated by the Java compiler for a class if no explicit constructors are declared in that class.

Main characteristics:

• It does not take any arguments.
• It has the same visibility as the class (usually public).
• It calls the parent class's no-argument constructor (super();).

Example:

class MyClass {
    // The compiler will generate MyClass() {} automatically
    // if there are no other constructors in the class
}

class AnotherClass {
    int value;

    // Explicit constructor, default constructor is not generated
    public AnotherClass(int value) {
        this.value = value;
    }

    public AnotherClass() {
        // This is NOT a default constructor, this is an explicitly declared no-argument constructor
    }
}