Write Java with only a C compiler

Hello.java

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

java.h

#ifndef JAVA_H
#define JAVA_H

int puts(char *);

struct out_struct {
    int (*println)(char *);
};

struct system_struct {
    struct out_struct out;
};

struct system_struct System = {
    .out = { .println = &puts }
};

#define public
#define class int
#define Hello Hello()
#define static }
#define void int
#define String int argc, char *

#define println(s) println(s); { 

#endif

Makefile

CC = gcc
JAVAC = javac
SRCS = Hello.java

.PHONY: all run clean

all: hello Hello.class

hello: java.h $(SRCS)
	$(CC) -x c -o $@ -include $^

Hello.class: $(SRCS)
	$(JAVAC) $<

run: all
	./hello
	java Hello

clean:
	rm -f hello Hello.class