diff --git a/src/Main.java b/src/Main.java
new file mode 100644
index 0000000..c7de2a4
--- /dev/null
+++ b/src/Main.java
@@ -0,0 +1,22 @@
+public class Main {
+
+    public static void main(String[] args) {
+
+        // Singleton
+        SingletonLazy s1 = SingletonLazy.getInstancia();
+        SingletonLazy s2 = SingletonLazy.getInstancia();
+        System.out.println(s1 == s2);
+
+        // Strategy
+        Robo robo = new Robo();
+        robo.setComportamento(new ComportamentoNormal());
+        robo.mover();
+
+        robo.setComportamento(new ComportamentoAgressivo());
+        robo.mover();
+
+        // Facade
+        Facade facade = new Facade();
+        facade.migrarCliente("Gabriel");
+    }
+}
\ No newline at end of file
diff --git a/src/facade/Facade.java b/src/facade/Facade.java
new file mode 100644
index 0000000..ad4451b
--- /dev/null
+++ b/src/facade/Facade.java
@@ -0,0 +1,6 @@
+public class Facade {
+
+    public void migrarCliente(String nome) {
+        System.out.println("Cliente " + nome + " migrado com sucesso!");
+    }
+}
\ No newline at end of file
diff --git a/src/singleton/SingletonLazy.java b/src/singleton/SingletonLazy.java
new file mode 100644
index 0000000..a5c44b4
--- /dev/null
+++ b/src/singleton/SingletonLazy.java
@@ -0,0 +1,13 @@
+public class SingletonLazy {
+
+    private static SingletonLazy instancia;
+
+    private SingletonLazy() {}
+
+    public static SingletonLazy getInstancia() {
+        if (instancia == null) {
+            instancia = new SingletonLazy();
+        }
+        return instancia;
+    }
+}
\ No newline at end of file
diff --git a/src/strategy/Strategy.java b/src/strategy/Strategy.java
new file mode 100644
index 0000000..2e0c046
--- /dev/null
+++ b/src/strategy/Strategy.java
@@ -0,0 +1,25 @@
+public interface Comportamento {
+    void mover();
+}
+public class ComportamentoNormal implements Comportamento {
+    public void mover() {
+        System.out.println("Movendo normalmente");
+    }
+}
+public class ComportamentoAgressivo implements Comportamento {
+    public void mover() {
+        System.out.println("Movendo agressivamente");
+    }
+}
+public class Robo {
+
+    private Comportamento comportamento;
+
+    public void setComportamento(Comportamento comportamento) {
+        this.comportamento = comportamento;
+    }
+
+    public void mover() {
+        comportamento.mover();
+    }
+}
\ No newline at end of file