An instance field is born when its object is ... Duplicate code adds unnecessary bulk to the class. Java provides a way to avoid this duplication by offering this() syntax for having one ...

Instance main methods and unnamed classes, coming in Java 21, will forever change how developers learn Java and bootstrap applications. Why? They provide a simple, clean and concise syntax to launch ...

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.