Mini Java Compiler - Lexical, Syntax, and Semantic Analysis

Welcome to our Mini Compiler Project!

This project is a lightweight Java-based compiler designed to demonstrate the three critical phases of compilation:

1. Lexical Analysis: Breaking down the source code into meaningful tokens while validating their format.
2. Syntax Analysis: Ensuring the code adheres to the rules of Java's syntax by validating token order and structure.
3. Semantic Analysis: Verifying the semantic correctness of declarations, such as type compatibility between variables and their values.

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Key Features

• Supports Multiple Lines: Validates multiple Java variable declarations in a single run.
• Java Primitive Data Types: Handles data types like int, float, double, char, boolean, and String.
• Flexible Input: Works with or without spaces around operators like = and ;.
• Detailed Error Reporting: Provides clear feedback for missing semicolons, invalid identifiers, data type mismatches, and more.

How does it work?

Example code:
int x = 1; → passes all the phases (Lexical, Syntax, Semantic).
x int 1 ; = → only passes Lexical Analysis Phase.
int x = 2.0; → only passes Lexical Analysis and Syntax Analysis.