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#GAME OF LIFE CONWAY JAVA HOW TO#
#GAME OF LIFE CONWAY JAVA CODE#
#GAME OF LIFE CONWAY JAVA LICENSE#

#GAME OF LIFE CONWAY JAVA CODE#

This code sample is by Ville Voutilainen.The Game of Life (an example of a cellular automaton) is played on an infinite two-dimensional rectangular grid of cells. You can invoke this on any Lisp object if it can't be converted, it will be returned as-is.

public Object LispObject.javaInstance(): Converts (or unwraps) a Lisp object to Java.

public static LispObject JavaObject.getInstance(Object, boolean): Converts (or wraps) a Java object to a Lisp object, if the boolean is true (else it just wraps it in a JavaObject).

Of nice methods you can use in all cases:

#GAME OF LIFE CONWAY JAVA HOW TO#

Since the user can't be expected to know how to map every Java type to Lisp and vice-versa, there are a couple On the Lisp side, we can access these integers as if they came from directly from another Lisp method:Ĭonverting Java objects to Lisp values and vice-versa.Note also that we wrap the ints (in this example) as Fixnums. ABCL's Cons Java class corresponds to a Lisp list. Our original Lisp function returned a list.Suppose we have a function called my-function defined in my-lisp-code.lisp (which was loaded above).In this case, our function is in the default Lisp package: You can then load the package containing a function you want to call.Interpreter.eval("(load \"my-lisp-code.lisp\")") Interpreter interpreter = Interpreter.createInstance() To load a file of Lisp functions from Java, you do the following:.JavaObject: A subclass of LispObject for objects coming from Java.execute(): Executes a function taking a variable number of LispObjects as arguments.getSymbolFunction(): Returns the function for a corresponding symbol.findAccessibleSymbol(String symbolName): Finds a symbol such as that for a function.findPackage(String packageName): Finds a Lisp package.Often used with load to load a Lisp file. eval(String expression): Evaluates a Lisp expression.createInstance(): Creates a Lisp interpreter.Can unbox LispObjects to Java primitives with methods such as intValue() which returns (surprise!) an int.Īll the classes below are in the package:.Can also unbox Cons objects into arrays, if you wish by using the copyToArray() method which returns LispObject.Has car() and cdr() methods if you want to write Java code in a Lisp style.Type the following at the command line (adjust the path as necessary):Ĭ:\abcl-src-0.15.0\dist>java -jar abcl.jar.You will need to add abcl.jar to your class path for ABCL projects.In the end, you will end up with a file called.Go to the ABCL page and find the download link.Therefore: Write great applications using Java for your front-end GUI backed with Lisp code and get the best of both worlds.Lisp is the world's greatest programming language Basically this means you can use ABCL from your application without the need to make your own application open source.īut it's not the world's greatest programming language.

#GAME OF LIFE CONWAY JAVA LICENSE#

ABCL is distributed under the GNU General Public License with Classpath exception.Supports interoperability both ways between Java and Lisp.Armed Bear Common Lisp (ABCL) - User Documentation "It's the right to arm bears" Paul Westerberg Overview