Making a Java Makefile

Question

EDIT: Essentially, I am trying to do the same thing as typing "javac sim.java" and then "java sim (commands)". Is there a way to replace this using a makefile?

So I have looked at a lot of examples online and tried to modify them to what I need, but nothing has worked. I need a makefile so that my teacher can create my project just by typing "make" into terminal (this is a requirement of the project for some reason). My end goal is to be able to type "sim" followed by the required commands as defined by my code. The code runs in eclipse, but I can't get it to run using these commands in terminal. It will make the file, but it says "sim: command not found" when I try to type "sim....(arguments)" into terminal. I'm sure this is a dumb question but we have not learned about this in school and I have no experience with Makefile.

Below is my makefile.

JFLAGS = -g
JC = javac
OPT = -O3
#OPT = -g
WARN = -Wall

sim: sim.class

sim.class: sim.java
    $(JC) $(JFLAGS) sim.java

clean:
    $(RM) sim.class

clobber:
    $(RM) sim.class

Answer 1

For a simple project without many files or dependencies, I simply use scripts.

To build:

javac -cp .;* *.java

To run:

java -cp .;* SomeMainClass

Replace . with whatever path(s) you need for your source. The * will use any jar on the default path or use a different path like lib/*.