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POSmalltalk - Can write the Java program in Smalltalk?
 

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  1. POSmalltalk - Can write the Java program in Smalltalk?
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    <p>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.</p> <p>Intermediate code file, which computes the factorial of a number:</p> <pre><code>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 </code></pre> <p>JavaExecutor.java Program :</p> <pre><code>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 &lt; 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&gt;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&lt;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 &gt; 0) { fileName = args[0]; } else{ System.out.println("Usage : JavaExecutor fileName.inp"); System.exit(0); } JavaExecutor j = new JavaExecutor(fileName); j.readFromFile(); j.executor(); } </code></pre> <p>}</p>
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      1. POSmalltalk - Can write the Java program in Smalltalk?
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    1. COYour question already indicates that you may want to start with something more simple... and smalltalk is an object-oriented language.
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      1. POSmalltalk - Can write the Java program in Smalltalk?
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    2. COoh I apologize for my lack of knowledge I confused dynamic with functional made the corrections thanks
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      1. POSmalltalk - Can write the Java program in Smalltalk?
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    3. CO@Yaba, David (Simberon) handed you the code. Please accept the answer or ask for additional information.
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      1. POSmalltalk - Can write the Java program in Smalltalk?
      1. USSean DeNigris
 

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