//Abstract Builder

class abstract class TextConverter{

    abstract void convertCharacter(char c);

    abstract void convertParagraph();

}

​

// Product

class ASCIIText{

    public void append(char c){ //Implement the code here }

}

​

//Concrete Builder

class ASCIIConverter extends TextConverter{

    ASCIIText asciiTextObj;//resulting product

​

    /*converts a character to target representation and appends to the resulting*/

    object void convertCharacter(char c){

        char asciiChar = new Character(c).charValue();

            //gets the ascii character

        asciiTextObj.append(asciiChar);

    }

    void convertParagraph(){}

    ASCIIText getResult(){

        return asciiTextObj;

    }

}

​

//This class abstracts the document object

class Document{

    static int value;

    char token;

    public char getNextToken(){

        //Get the next token

        return token;

    }

}

​

//Director

class RTFReader{

    private static final char EOF='0'; //Delimitor for End of File

    final char CHAR='c';

    final char PARA='p';

    char t;

    TextConverter builder;

    RTFReader(TextConverter obj){

        builder=obj;

    }

    void parseRTF(Document doc){

        while ((t=doc.getNextToken())!= EOF){

            switch (t){

                case CHAR: builder.convertCharacter(t);

                case PARA: builder.convertParagraph();

            }

        }

    }

}

​

//Client

public class Client{

    void createASCIIText(Document doc){

        ASCIIConverter asciiBuilder = new ASCIIConverter();

        RTFReader rtfReader = new RTFReader(asciiBuilder);

        rtfReader.parseRTF(doc);

        ASCIIText asciiText = asciiBuilder.getResult();

    }

    public static void main(String args[]){

        Client client=new Client();

        Document doc=new Document();

        client.createASCIIText(doc);

        system.out.println("This is an example of Builder Pattern");

    }

}