Java Foundations for a C# Developer

Distinguish the roles of the JDK, JRE, and JVM in developing and running Java applications.

Compile and run a Java application from an IDE and the command line.

Implement Java methods using variables, operators, control flow, and type conversions.

Define a Java class using fields, constructors, methods, and encapsulation.

Organize Java classes with packages, imports, and access modifiers.

Trace Java object references and apply null-safety checks to diagnose and prevent NullPointerException errors.