added thermostat and builder examples.

src/builder/builder.rb

@@ -0,0 +1,11 @@
+require 'rubygems'
+require 'builder/xmlmarkup'
+
+sb = Builder::XmlMarkup.new(:target => "")
+sb.person { sb.name("Jim") }
+puts sb.target!
+
+
+fb = Builder::XmlMarkup.new(:target => STDOUT)
+fb.person { fb.name("Bob") }
+puts

src/thermostat/App.java

@@ -0,0 +1,7 @@
+class App {
+    public static void main(String[] args) {
+        Furnace f = new Furnace();
+        Thermostat t = new Thermostat(f);
+        t.run();
+    }
+}

src/thermostat/Furnace.java

@@ -0,0 +1,11 @@
+class Furnace {
+    public Furnace() {
+        off();
+    }
+    public void on() {
+        System.out.println("Furnace is on");
+    }
+    public void off() {
+        System.out.println("Furnace is off");
+    }
+}

src/thermostat/Rakefile

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+require 'rake/clean'
+
+PROG = 'App'
+JAVA_FILES = FileList['*.java']
+CLASS_FILES = JAVA_FILES.ext(".class")
+
+CLEAN.include("*.class")
+
+task :default => :prog
+
+task :prog => CLASS_FILES
+
+task :run => :prog do
+  sh "java #{PROG}"
+end
+
+rule '.class' => '.java' do |r|
+  sh "javac #{r.source}"
+end

src/thermostat/Thermostat.java

@@ -0,0 +1,15 @@
+class Thermostat {
+    public Thermostat(Furnace f) {
+        this.furnace = f;
+    }
+    public void run() {
+        if (should_be_on()) {
+            this.furnace.on();
+        } else {
+            this.furnace.off();
+        }
+    }
+
+    private Furnace furnace;
+    private boolean should_be_on() { return true; }
+}

src/thermostat_dip/App.java

@@ -0,0 +1,7 @@
+class App {
+    public static void main(String[] args) {
+        Furnace f = new Furnace();
+        Thermostat t = new Thermostat(f);
+        t.run();
+    }
+}

src/thermostat_dip/Furnace.java

@@ -0,0 +1,11 @@
+class Furnace implements OnOffDevice {
+    public Furnace() {
+        off();
+    }
+    public void on() {
+        System.out.println("Furnace is on");
+    }
+    public void off() {
+        System.out.println("Furnace is off");
+    }
+}

src/thermostat_dip/OnOffDevice.java

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+interface OnOffDevice {
+    public void on();
+    public void off();
+}

src/thermostat_dip/Rakefile

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+require 'rake/clean'
+
+PROG = 'App'
+JAVA_FILES = FileList['*.java']
+CLASS_FILES = JAVA_FILES.ext(".class")
+
+CLEAN.include("*.class")
+
+task :default => :prog
+
+task :prog => CLASS_FILES
+
+task :run => :prog do
+  sh "java #{PROG}"
+end
+
+rule '.class' => '.java' do |r|
+  sh "javac #{r.source}"
+end

src/thermostat_dip/Thermostat.java

@@ -0,0 +1,15 @@
+class Thermostat {
+    public Thermostat(OnOffDevice f) {
+        this.furnace = f;
+    }
+    public void run() {
+        if (should_be_on()) {
+            this.furnace.on();
+        } else {
+            this.furnace.off();
+        }
+    }
+
+    private OnOffDevice furnace;
+    private boolean should_be_on() { return true; }
+}

src/thermostat_ruby/app.rb

@@ -0,0 +1,5 @@
+require 'furnace'
+require 'thermostat'
+
+t = Thermostat.new(Furnace.new)
+t.run

src/thermostat_ruby/furnace.rb

@@ -0,0 +1,12 @@
+class Furnace
+  def initialize
+    off
+  end
+  def on
+    puts "Furnace is on"
+  end
+  def off
+    puts "Furnace is off"
+  end
+end
+

src/thermostat_ruby/thermostat.rb

@@ -0,0 +1,15 @@
+class Thermostat
+  def initialize(furnace)
+    @furnace = furnace
+  end
+  def run
+    if should_be_on?
+      @furnace.on
+    else
+      @furnace.off
+    end
+  end
+  def should_be_on?
+    true
+  end
+end