Fork and clone this lesson to run the code. Let's add an instance variable isWaggingTail to the Dog class. Each dog will store its own copy of the variable. Let's step through the main method using ...

Variable scope is the range of code where a variable is visible and can be referenced. In JavaSE, there are four types of variable scope: class, instance, method, and block.

Can have instance mutable fields, parameters, or local variables. Only functional interfaces can use the lambda feature in Java. Abstract classes with only one abstract method cannot use lambdas.

In object-oriented programming, particularly in Java, class fields are seperated into two distinct types: class variables and instance variables. Class variables are variables that have been defined ...

According to the Java Enhancement Proposal 445: …these changes allow us to write Hello, World! with no access modifiers, no static modifiers, and no String[] parameter, so the introduction of these ...

This ability to implicitly treat instance methods as functions accepting their instance as a parameter is a powerful feature of Java’s lambda expressions and method references. It allows you to ...

This chapter discusses instance variables, access modifiers, and encapsulation. Java methods start with an access modifier of public, private, protected, or blank (default access). This is followed by ...

Here's a topic I don't understand. What's the benefit of making a private constructor and a public getInstance method? I understand why you would make the constructor private: to keep someone from ...