Deconstruct public static void main and System.out.println.

Master curly braces, blocks, identifiers, and naming conventions.

Document code using single-line, multi-line, and Javadoc comments.

Declare, initialize, and update strongly-typed variables in Java.

Master the 8 primitive types: byte, short, int, long, float, double, boolean, and char.

Perform math with +, -, *, /, %, and the Math utility class.

Work with the String class, concatenation, length, and methods.

Evaluate truth values with ==, !=, <, >, <=, and >=.

Convert between data types using widening and narrowing casting.

Read terminal input using java.util.Scanner.

Combine multiple boolean conditions with AND, OR, and NOT.

Execute conditional code blocks when a boolean expression is true.

Create two-way conditional execution with fallback blocks.

Evaluate multiple sequential conditions in cascading order.

Match variables against discrete values cleanly using switch, case, and break.

Repeat code execution as long as a boolean condition remains true.

Guarantee at least one execution with post-test loop logic.

Iterate with precise counter initialization, condition, and step increments.

Interrupt or skip loop iterations on demand.

Declare, allocate, and initialize fixed-size homogeneous arrays.

Access items with 0-based indices and traverse using standard loops.

Iterate through arrays and collections without managing index counters.

Master charAt(), substring(), equals(), contains(), and split().

Organize code into reusable, modular subroutines with return types.

Pass data into methods via typed parameters and pass-by-value semantics.

Define multiple methods with the exact same name but different parameter lists.

Model real-world entities with state (fields) and behavior (methods).

Initialize object state reliably at the moment of instantiation.

Catch and recover from runtime errors gracefully without crashing.

Build full standalone Java programs combining classes, loops, logic, and arrays.