#Java + Guava 16 (Guava isn't super necessary, but it made some things a little less annoying to write).

Alright, you're supposed to be working? How about a program that actually writes real Java code, that actually compiles (though it doesn't do much).

It's difficult to demonstrate the animation, but this program writes a Java program using either the default dictionary (250 common English words) or a newline delimited file (taken as a command line argument), and types it to the console one character at a time at human seeming speeds. Make sure to run it yourself because this post doesn't do it justice. When it finishes, it waits 1 minute, then prints a lot of blank lines to the console, and starts over again. I tried to write it to make various parameters reasonably tweakable.

Also, normally I would put this into more than one file, but to make it easier to run I smushed all the classes together.

package org.stackoverflow.ppcg;

import java.io.*;
import java.util.*;

import com.google.common.base.CaseFormat;
import com.google.common.base.Converter;
import com.google.common.collect.Lists;

public class CodeGenerator {
    public static final Converter<String, String> TOUPPER =
            CaseFormat.LOWER_CAMEL.converterTo(CaseFormat.UPPER_CAMEL);
    public static final Converter<String, String> TOLOWER =
            CaseFormat.UPPER_CAMEL.converterTo(CaseFormat.LOWER_CAMEL);
    
    public static final String[] TYPES = new String[]{
        "int", "long", "double", "String"
    };
    
    public static final List<String> DEFAULT_LIST = Arrays.asList(new String[]{
            "the", "and", "for", "you", "say", "but", "his", "not", "she", "can",
            "who", "get", "her", "all", "one", "out", "see", "him", "now", "how",
            "its", "our", "two", "way", "new", "day", "use", "man", "one", "her",
            "any", "may", "try", "ask", "too", "own", "out", "put", "old", "why",
            "let", "big", "few", "run", "off", "all", "lot", "eye", "job", "far",
            "have", "that", "with", "this", "they", "from", "that", "what", "make", "know",
            "will", "time", "year", "when", "them", "some", "take", "into", "just", "your",
            "come", "than", "like", "then", "more", "want", "look", "also", "more", "find",
            "here", "give", "many", "well", "only", "tell", "very", "even", "back", "good",
            "life", "work", "down", "call", "over", "last", "need", "feel", "when", "high",
            "their", "would", "about", "there", "think", "which", "could", "other", "these", "first",
            "thing", "those", "woman", "child", "there", "after", "world", "still", "three", "state",
            "never", "leave", "while", "great", "group", "begin", "where", "every", "start", "might",
            "about", "place", "again", "where", "right", "small", "night", "point", "today", "bring",
            "large", "under", "water", "write", "money", "story", "young", "month", "right", "study",
            "people", "should", "school", "become", "really", "family", "system", "during", "number", "always",
            "happen", "before", "mother", "though", "little", "around", "friend", "father", "member", "almost",
            "change", "minute", "social", "follow", "around", "parent", "create", "others", "office", "health",
            "person", "within", "result", "change", "reason", "before", "moment", "enough", "across", "second",
            "toward", "policy", "appear", "market", "expect", "nation", "course", "behind", "remain", "effect",
            "because", "through", "between", "another", "student", "country", "problem", "against", "company", "program",
            "believe", "without", "million", "provide", "service", "however", "include", "several", "nothing", "whether",
            "already", "history", "morning", "himself", "teacher", "process", "college", "someone", "suggest", "control",
            "perhaps", "require", "finally", "explain", "develop", "federal", "receive", "society", "because", "special",
            "support", "project", "produce", "picture", "product", "patient", "certain", "support", "century", "culture"
    });
    
    private static final int CLASS_NAME_LENGTH = 2;
    
    private final WordList wordList;
    private final Appendable out;
    private final Random r = new Random();
    
    private CodeGenerator(WordList wordList, Appendable out) {
        this.wordList = wordList;
        this.out = out;
    }

    public static void main(String... args) throws Exception {
        List<?> wordSource = getWords(args);
        WordList list = new WordList(wordSource);
        SleepingAppendable out = new SleepingAppendable(System.out);
        CodeGenerator generator = new CodeGenerator(list, out);
        while(!Thread.interrupted()) {
            generator.generate();
            try {
                Thread.sleep(60000);
            } catch (InterruptedException e) {
                break;
            }
            out.setSleeping(false);
            for(int i = 0; i < 100; i++) {
                out.append(System.lineSeparator());
            }
            out.setSleeping(true);
        }
    }

    private static List<?> getWords(String[] args) {
        if(args.length > 0) {
            try {
                return getListFromFile(args[0]);
            } catch(IOException e) { }
        }
        return DEFAULT_LIST;
    }

    private static List<Object> getListFromFile(String string) throws IOException {
        List<Object> newList = Lists.newArrayList();
        
        File f = new File(string);
        Scanner s = new Scanner(f);
        
        while(s.hasNext()) {
            newList.add(s.nextLine());
        }
        
        return newList;
    }

    private void generate() throws IOException {
        String className = beginClass();
        List<Field> finalFields = generateFields(true);
        printFields(finalFields);
        out.append(System.lineSeparator());
        List<Field> mutableFields = generateFields(false);
        printFields(mutableFields);
        out.append(System.lineSeparator());
        printConstructor(className, finalFields);
        printGetters(finalFields);
        printGetters(mutableFields);
        printSetters(mutableFields);
        endClass();
    }

    private void printGetters(List<Field> fields) throws IOException {
        for(Field f : fields) {
            out.append(System.lineSeparator());
            f.printGetter(out);
        }
    }
    
    private void printSetters(List<Field> fields) throws IOException {
        for(Field f : fields) {
            out.append(System.lineSeparator());
            f.printSetter(out);
        }
    }

    private void printConstructor(String className, List<Field> finalFields) throws IOException {
        out.append("\tpublic ").append(className).append('(');
        printArgs(finalFields);
        out.append(") {").append(System.lineSeparator());
        for(Field f : finalFields) {
            f.printAssignment(out);
        }
        out.append("\t}").append(System.lineSeparator());
    }

    private void printArgs(List<Field> finalFields) throws IOException {
        if(finalFields.size() == 0) return;
        
        Iterator<Field> iter = finalFields.iterator();
        
        while(true) {
            Field next = iter.next();
            next.printTypeAndName(out);
            if(!iter.hasNext()) break;
            out.append(", ");
        }
    }

    private List<Field> generateFields(boolean isfinal) {
        int numFields = r.nextInt(3) + 2;
        List<Field> newFields = Lists.newArrayListWithCapacity(numFields);
        for(int i = 0; i < numFields; i++) {
            String type = TYPES[r.nextInt(4)];
            newFields.add(new Field(type, wordList.makeLower(r.nextInt(2) + 1), isfinal));
        }
        return newFields;
    }
    
    private void printFields(List<Field> finalFields) throws IOException {
        for(Field f : finalFields) {
            f.printFieldDeclaration(out);
        }
    }

    private String beginClass() throws IOException {
        out.append("public class ");
        String className = wordList.nextClassName(CLASS_NAME_LENGTH);
        out.append(className).append(" {").append(System.lineSeparator());
        
        return className;
    }
    
    private void endClass() throws IOException {
        out.append("}");
    }
    
    private static class WordList {
        private final Random r = new Random();

        private final List<?> source;
        
        private WordList(List<?> source) {
            this.source = source;
        }
        
        private String makeUpper(int length) {
            StringBuilder sb = new StringBuilder();
            for(int i = 0; i < length; i++) {
                sb.append(randomWord());
            }
            return sb.toString();
        }
        
        private String makeLower(int length) {
            return TOLOWER.convert(makeUpper(length));
        }
        
        private String randomWord() {
            int sourceIndex = r.nextInt(source.size());
            return TOUPPER.convert(source.get(sourceIndex).toString().toLowerCase());
        }
        
        public String nextClassName(int length) {
            return makeUpper(length);
        }
    }
    
    private static class Field {
        private final String type;
        private final String fieldName;
        private final boolean isfinal;
        
        Field(String type, String fieldName, boolean isfinal) {
            this.type = type;
            this.fieldName = fieldName;
            this.isfinal = isfinal;
        }
        
        void printFieldDeclaration(Appendable appendable) throws IOException {
            appendable.append("\tprivate ");
            if(isfinal) appendable.append("final ");
            printTypeAndName(appendable);
            appendable.append(';').append(System.lineSeparator());
        }

        void printTypeAndName(Appendable appendable) throws IOException {
            appendable.append(type).append(' ').append(fieldName);
        }
        
        void printGetter(Appendable appendable) throws IOException {
            appendable.append("\tpublic ");
            appendable.append(type).append(" get").append(TOUPPER.convert(fieldName));
            appendable.append("() {").append(System.lineSeparator());
            appendable.append("\t\treturn ").append(fieldName).append(';');
            appendable.append(System.lineSeparator()).append("\t}").append(System.lineSeparator());
        }
        
        void printSetter(Appendable appendable) throws IOException {
            appendable.append("\tpublic void set");
            appendable.append(TOUPPER.convert(fieldName));
            appendable.append("(").append(type).append(' ').append(fieldName);
            appendable.append(") {").append(System.lineSeparator());
            printAssignment(appendable);
            appendable.append("\t}").append(System.lineSeparator());            
        }
        
        void printAssignment(Appendable appendable) throws IOException {
            appendable.append("\t\tthis.").append(fieldName).append(" = ").append(fieldName);
            appendable.append(';').append(System.lineSeparator());
        }
    }
    
    private static class SleepingAppendable implements Appendable {
        private Random r = new Random();
        private Appendable backing;
        
        private boolean sleeping = true;
        
        public SleepingAppendable(Appendable backing) {
            this.backing = backing;
        }
        
        @Override
        public Appendable append(CharSequence csq) throws IOException {
            return append(csq, 0, csq.length());
        }

        @Override
        public Appendable append(CharSequence csq, int start, int end)
                throws IOException {
            for(int i = start; i < end; i++) {
                append(csq.charAt(i));
            }
            
            sleep(100, 300);
            
            return this;
        }

        @Override
        public Appendable append(char c) throws IOException {
            sleep(170, 80);
            
            backing.append(c);
            
            return this;
        }

        
        private void sleep(int base, int variation) {
            if(!sleeping) return;
            try {
                Thread.sleep((long) (r.nextInt(80) + 70));
            } catch (InterruptedException e) {
            }
        }

        public boolean isSleeping() {
            return sleeping;
        }

        public void setSleeping(boolean sleeping) {
            this.sleeping = sleeping;
        }
    }
}

Sample program output (just one program)

public class GetGroup {
    private final double thoughRight;
    private final double socialYear;
    private final double manOne;
    private final int appear;

    private double man;
    private double comeHis;
    private double certain;

    public GetGroup(double thoughRight, double socialYear, double manOne, int appear) {
        this.thoughRight = thoughRight;
        this.socialYear = socialYear;
        this.manOne = manOne;
        this.appear = appear;
    }

    public double getThoughRight() {
        return thoughRight;
    }

    public double getSocialYear() {
        return socialYear;
    }

    public double getManOne() {
        return manOne;
    }

    public int getAppear() {
        return appear;
    }

    public double getMan() {
        return man;
    }

    public double getComeHis() {
        return comeHis;
    }

    public double getCertain() {
        return certain;
    }

    public void setMan(double man) {
        this.man = man;
    }

    public void setComeHis(double comeHis) {
        this.comeHis = comeHis;
    }

    public void setCertain(double certain) {
        this.certain = certain;
    }
}

Another sample output:

public class TryControl {
    private final int over;
    private final double thatState;
    private final long jobInto;
    private final long canPut;

    private int policy;
    private int neverWhile;

    public TryControl(int over, double thatState, long jobInto, long canPut) {
        this.over = over;
        this.thatState = thatState;
        this.jobInto = jobInto;
        this.canPut = canPut;
    }

    public int getOver() {
        return over;
    }

    public double getThatState() {
        return thatState;
    }

    public long getJobInto() {
        return jobInto;
    }

    public long getCanPut() {
        return canPut;
    }

    public int getPolicy() {
        return policy;
    }

    public int getNeverWhile() {
        return neverWhile;
    }

    public void setPolicy(int policy) {
        this.policy = policy;
    }

    public void setNeverWhile(int neverWhile) {
        this.neverWhile = neverWhile;
    }
}