【初心者向け】Javaの演算子を徹底解説

Java Naming Conventions: Variables & Constants

Variables in Java

Primitive Data Types in Java

2. Creating and using variables in a Java program

Java program to print default values of primitive data types and local variables

Reference Data Types in Java

Data Types in Java – Primitive and Non-Primitive Data Types Explained - Shiksha Online

Java Data Types: Short, Int & Long