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All LessonsFree Lessons (5)

Java Ecosystem

Introduction Java & it's Ecosystem Java Virtual Machine Java Flavors & Processes Java Tools & Files

Methods

Variable Argument Passing Pass by Value Pass by Reference Method Overloading

Classes

Accessibility The Object Class Constructors Initialization Classes Nested Classes Anonymous and Local Classes Abstract Classes Final Class Super Keyword Finalize

Interfaces

Interfaces More on Interfaces

Inheritance

Inheritance Multiple Inheritance Inheritance Gotchas

Lambda Expressions

Basics More on Lambdas

Generics

The Get & the Put Principle

Multi-Threading

Fundamentals Thread Safety Mutexes vs Semaphores Synchronized Volatile Wait() and Notify()More on Threading

Memory Management

Memory Areas Reference Strengths Garbage Collection Memory Tuning

Collections

Collection Types Iterating in Java Summary

Exceptions

Exceptions Checked vs Unchecked Catch Block More on Exceptions

Reflection

Introduction java.lang.Class Class Modifiers Instantiation using Reflection Classloaders

Serialization

Basics More on Serialization

Miscellaneous Topics

Types Keywords Annotations Boxing Unboxing Package Strings Casting

Java in Practice

Quick Note Object Creation Using Objects Designing Classes Inheritance vs Composition Interfaces vs Abstract Classes Using Generics Enums & Annotations Method Design General Best Practices Exceptions Handling Concurrency

Patterns

Singleton Builder Cheat Sheet

The End

Practice Mock Interview

The Java Interview Handbook: 300+ Interview Questions/

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Type Inference

Type Inference

This lesson explains the concept of type inference.

We'll cover the following...

Question # 1

What is type inference?

Type inference is Java compiler's ability to look at each method invocation and corresponding method declaration to determine the type argument, or arguments that make the invocation applicable. The inference algorithm determines the types of the arguments and, if available, the type of the result being assigned, or returned. Consider the useless but instructional class below: ...