I am trying to convert this Java interpreter I wrote for my compiler to a Smalltalk interpreter. Is it possible? If so, what would be a good resources to look at? I am completely new to Smalltalk, looks weird to me for now. I would appreciate any help, thanks. Some more info on the program: The input would be an intermediate code file a sample of which is as below.

Intermediate code file, which computes the factorial of a number:

```
read
store x
push x
store i
push   1.0
store fact
push i
push   1.0
greater
testfgoto 21
push fact
push i
multiply
store fact
push i
push   1.0
minus
store i
push 1.0
testtgoto 7
push fact
print
end

```

JavaExecutor.java Program :

```
public void executor(){
    String operation = null;
    StringTokenizer tokens = null;
    String key,value = null;
    Double tempVar = null;
    // Traverse the Arraylist to get the operations
    for(int i=0; i < operations.size(); i++){
        operation = (String)operations.get(i);
        System.out.println("Operation -------"+ operation);
        tokens = new StringTokenizer(operation);
        while(tokens.hasMoreTokens()){
            key = tokens.nextToken();
            //System.out.println("KEY "+ key);
            if(key.toUpperCase().equals("PUSH")){
                //System.out.println("Push Operation");
                value = (String)tokens.nextToken();
                //System.out.println("value "+ value);
                if(checkforVaribaleName(value)){
                    stack.push((Double)assignments.get(value));
                    System.out.println("PUSH"+ (Double)assignments.get(value));
                }
                else if(value != null){
                    stack.push(Double.parseDouble(value));
                    System.out.println("PUSH" + value);
                } else{
                    stack.push(0.0);
                    System.out.println("PUSH" + 0.0);
                }
                break;

            }else if(key.toUpperCase().equals("POP")){
                //NO LOGIC
                break;

            }else if(key.toUpperCase().equals("READ")){
                //System.out.println("Read Operation");
                tempVar = readDoubleFromConsole();
                stack.push(tempVar);
                System.out.println("PUSHP :"+tempVar);
                break;

            }else if(key.toUpperCase().equals("WRITE")){
                break;
            }else if(key.toUpperCase().equals("MULTIPLY")){
                //System.out.println("MULTIPLY operation");
                Double first = (Double)stack.pop();
                Double second = (Double)stack.pop();
                stack.push(first*second);
                System.out.println("PUSH "+ first*second);
                break;

            }else if(key.toUpperCase().equals("DIVIDE")){
                Double first = (Double)stack.pop();
                Double second = (Double)stack.pop();
                stack.push(second/first);
                break;
            }else if(key.toUpperCase().equals("PLUS")){
                Double first = (Double)stack.pop();
                Double second = (Double)stack.pop();
                stack.push(second+first);
                break;
            }else if(key.toUpperCase().equals("MINUS")){
                Double first = (Double)stack.pop();
                Double second = (Double)stack.pop();
                stack.push(second-first);
                System.out.println("PUSH "+ (second-first));
                break;
            }else if(key.toUpperCase().equals("GREATER")){
                //System.out.println("GREATER operation");
                Double first = (Double)stack.pop();
                System.out.println("POP :"+first);
                Double second = (Double)stack.pop();
                System.out.println("POP "+ second);
                if(second>first){
                    stack.push(1.0);
                }
                else{
                    stack.push(0.0);
                }
                break;
            }else if(key.toUpperCase().equals("LESS")){
                Double first = (Double)stack.pop();
                Double second = (Double)stack.pop();
                if(second<first){
                    stack.push(1.0);
                }
                else{
                    stack.push(0.0);
                }
                break;
            }else if(key.toUpperCase().equals("EQUAL")){
                Double first = (Double)stack.pop();
                Double second = (Double)stack.pop();
                if(second==first){
                    stack.push(1.0);
                }
                else{
                    stack.push(0.0);
                }
                break;
            }else if(key.toUpperCase().equals("STORE")){
                //System.out.println("Store operation");
                value = (String)tokens.nextToken();

                assignments.put(value, (Double)stack.pop());
                System.out.println("POP :"+assignments.get(value));
                break;
            }else if(key.toUpperCase().equals("TESTFGOTO")){
                value = (String)tokens.nextToken();
                if((Double)stack.pop() == 0.0){
                    System.out.println("POP " +0.0);
                    i = Integer.parseInt(value)-2;
                }
                break;
            }else if(key.toUpperCase().equals("TESTTGOTO")){
                value = (String)tokens.nextToken();
                if((Double)stack.pop() == 1.0){
                    System.out.println("POP " +1.0);
                    i = (Integer.parseInt(value)-2);
                    System.out.println(i);
                }
                break;
            }else if(key.toUpperCase().equals("PRINT")){
                //System.out.println("PRINT operation");
                System.out.println("Result "+stack.pop());
                break;
            }else if(key.toUpperCase().equals("END")){
                System.out.println("Execution Completed");
                System.exit(0);
            }

        }
    }
}

public static void main(String args[])
{
    String fileName = null;
    if(args.length > 0)
    {
        fileName = args[0];
    }
    else{
        System.out.println("Usage : JavaExecutor fileName.inp");
        System.exit(0);
    }
    JavaExecutor j = new JavaExecutor(fileName);
    j.readFromFile();
    j.executor();

}

```

}