Explicitly calling superclass constructors in Java uses 'super(arguments);' as the first statement in a child constructor. This is required when the parent class has no no-arg constructor or when you need to pass specific values to the parent. For example, if 'Employee extends Person' and Person requires a name, you must call 'super(name);' in Employee's constructor. The super() call must be the first statement. Understanding explicit super calls ensures proper parent initialization with required data.

Mastering explicit super calls enables you to control parent initialization when constructors require parameters. Being able to pass data up the inheritance chain is essential for proper object construction. In professional development, this pattern ensures all levels of a hierarchy receive necessary initialization data. For example, if a parent class requires database connection info, child constructors must provide it via super(). This ensures proper initialization throughout the hierarchy.

By learning explicit super calls, you'll handle complex inheritance initialization correctly. Understanding that super() must be first and that it can only call one parent constructor helps you design initialization chains. This knowledge is fundamental to inheritance. Prerequisites include understanding constructors, inheritance, and constructor chaining.