Explain the purpose of the equals() method in Java and its importance when comparing objects.

The equals() method in Java is used to compare objects for logical equality, meaning to determine whether two objects are considered equivalent in content rather than by reference.

By default, the equals() method is inherited from the Object class and compares references (i.e., checks if the variables point to the same object). For proper content comparison, classes usually override this method.

Importance of equals():

• Allows comparing objects meaningfully, for example, two different strings with the same text.
• Used in collections (e.g., HashSet, HashMap) to determine the uniqueness of elements.

Example of overriding equals():

@Override
public boolean equals(Object obj) {
    if (this == obj) return true;
    if (obj == null || getClass() != obj.getClass()) return false;
    MyClass other = (MyClass) obj;
    return Objects.equals(field1, other.field1) && field2 == other.field2;
}

When overriding equals(), it is also recommended to override hashCode() for correct operation with hash collections.