compiler-project's Introduction

java-compiler

Project description

The objective of this project is to take a java file and then generate an intermediate java file with injected java statements, when running this file it prints out which blocks are executed and which are not, another output is an HTML for the input java file with highlighted green parts indicating the executed code and highlighted red parts indicating the code that does not execute.

Starting rule

compilationUnit
: packageDeclaration? importDeclaration* typeDeclaration*
| moduleDeclaration EOF
;

Example program

public class Test {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    }
}

Parse tree

Complete example

Test1 code

package Test;
public class Test1 {
    public static void main(String[] args) throws Exception{
        int x=1;
        int y=2;
        if (x>0) {
            if (x == 2)
                System.out.println("IF Block");
        }
        else
                if (y==2)
                    System.out.println("IF Block");
        switch(x) {
            case 5:
                System.out.println("This is a 5");
                break;
            case 1:
                System.out.println("This is a 10");
                break;
        }
        for(int i = 0 ; i<5;i++) {
            for (int j = 0; j < 5; j++)
                if (x > 0)
                    System.out.println("If operations");
                else {
                    System.out.println("Else block");
                }
        }
        int z = 0;
        while (z < 5) {
            if(y==5)
                System.out.println("While loop");
            z++;
        }
    }
}