Commit inicial

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-16">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>lab-padroes-projeto-java</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=16
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=16
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=16

src/one/digitalinnovation/gof/Test.java

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+package one.digitalinnovation.gof;
+
+import one.digitalinnovation.gof.facade.Facade;
+import one.digitalinnovation.gof.singleton.SingletonEager;
+import one.digitalinnovation.gof.singleton.SingletonLazy;
+import one.digitalinnovation.gof.singleton.SingletonLazyHolder;
+import one.digitalinnovation.gof.strategy.Comportamento;
+import one.digitalinnovation.gof.strategy.ComportamentoAgressivo;
+import one.digitalinnovation.gof.strategy.ComportamentoDefensivo;
+import one.digitalinnovation.gof.strategy.ComportamentoNormal;
+import one.digitalinnovation.gof.strategy.Robo;
+
+public class Test {
+
+	public static void main(String[] args) {
+
+		// Singleton
+
+		SingletonLazy lazy = SingletonLazy.getInstancia();
+		System.out.println(lazy);
+		lazy = SingletonLazy.getInstancia();
+		System.out.println(lazy);
+
+		SingletonEager eager = SingletonEager.getInstancia();
+		System.out.println(eager);
+		eager = SingletonEager.getInstancia();
+		System.out.println(eager);
+
+		SingletonLazyHolder lazyHolder = SingletonLazyHolder.getInstancia();
+		System.out.println(lazyHolder);
+		lazyHolder = SingletonLazyHolder.getInstancia();
+		System.out.println(lazyHolder);
+
+		// Strategy
+
+		Comportamento defensivo = new ComportamentoDefensivo();
+		Comportamento normal = new ComportamentoNormal();
+		Comportamento agressivo = new ComportamentoAgressivo();
+
+		Robo robo = new Robo();
+		robo.setComportamento(normal);
+		robo.mover();
+		robo.mover();
+		robo.setComportamento(defensivo);
+		robo.mover();
+		robo.setComportamento(agressivo);
+		robo.mover();
+		robo.mover();
+		robo.mover();
+
+		// Facade
+
+		Facade facade = new Facade();
+		facade.migrarCliente("Venilton", "14801788");
+	}
+
+}

src/one/digitalinnovation/gof/facade/Facade.java

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+package one.digitalinnovation.gof.facade;
+
+import subsistema1.crm.CrmService;
+import subsistema2.cep.CepApi;
+
+public class Facade {
+
+	public void migrarCliente(String nome, String cep) {
+		String cidade = CepApi.getInstancia().recuperarCidade(cep);
+		String estado = CepApi.getInstancia().recuperarEstado(cep);
+
+		CrmService.gravarCliente(nome, cep, cidade, estado);
+	}
+}

src/one/digitalinnovation/gof/singleton/SingletonEager.java

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+package one.digitalinnovation.gof.singleton;
+
+/**
+ * Singleton "apressado".
+ * 
+ * @author falvojr
+ */
+public class SingletonEager {
+
+	private static SingletonEager instancia = new SingletonEager();
+
+	private SingletonEager() {
+		super();
+	}
+
+	public static SingletonEager getInstancia() {
+		return instancia;
+	}
+}

src/one/digitalinnovation/gof/singleton/SingletonLazy.java

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+package one.digitalinnovation.gof.singleton;
+
+/**
+ * Singleton "preguiçoso".
+ * 
+ * @author falvojr
+ */
+public class SingletonLazy {
+
+	private static SingletonLazy instancia;
+
+	private SingletonLazy() {
+		super();
+	}
+
+	public static SingletonLazy getInstancia() {
+		if (instancia == null) {
+			instancia = new SingletonLazy();
+		}
+		return instancia;
+	}
+}

src/one/digitalinnovation/gof/singleton/SingletonLazyHolder.java

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+package one.digitalinnovation.gof.singleton;
+
+/**
+ * Singleton "Lazy Holder".
+ * 
+ * @see <a href="https://stackoverflow.com/a/24018148">Referencia</a>
+ * 
+ * @author falvojr
+ */
+public class SingletonLazyHolder {
+
+	private static class InstanceHolder {
+		public static SingletonLazyHolder instancia = new SingletonLazyHolder();
+	}
+
+	private SingletonLazyHolder() {
+		super();
+	}
+
+	public static SingletonLazyHolder getInstancia() {
+		return InstanceHolder.instancia;
+	}
+}

src/one/digitalinnovation/gof/strategy/Comportamento.java

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+package one.digitalinnovation.gof.strategy;
+
+public interface Comportamento {
+	void mover();
+}

src/one/digitalinnovation/gof/strategy/ComportamentoAgressivo.java

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+package one.digitalinnovation.gof.strategy;
+
+public class ComportamentoAgressivo implements Comportamento {
+
+	@Override
+	public void mover() {
+		System.out.println("Movendo-se agressivamente...");
+	}
+
+}

src/one/digitalinnovation/gof/strategy/ComportamentoDefensivo.java

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+package one.digitalinnovation.gof.strategy;
+
+public class ComportamentoDefensivo implements Comportamento {
+
+	@Override
+	public void mover() {
+		System.out.println("Movendo-se defensivamente...");
+	}
+
+}

src/one/digitalinnovation/gof/strategy/ComportamentoNormal.java

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+package one.digitalinnovation.gof.strategy;
+
+public class ComportamentoNormal implements Comportamento {
+
+	@Override
+	public void mover() {
+		System.out.println("Movendo-se normalmente...");
+	}
+
+}

src/one/digitalinnovation/gof/strategy/Robo.java

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+package one.digitalinnovation.gof.strategy;
+
+public class Robo {
+
+	private Comportamento comportamento;
+
+	public void setComportamento(Comportamento comportamento) {
+		this.comportamento = comportamento;
+	}
+
+	public void mover() {
+		comportamento.mover();
+	}
+}

src/subsistema1/crm/CrmService.java

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+package subsistema1.crm;
+
+public class CrmService {
+
+	private CrmService() {
+		super();
+	}
+
+	public static void gravarCliente(String nome, String cep, String cidade, String estado) {
+		System.out.println("Cliente salvo no sistema de CRM:");
+		System.out.println(nome);
+		System.out.println(cep);
+		System.out.println(cidade);
+		System.out.println(estado);
+	}
+}

src/subsistema2/cep/CepApi.java

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+package subsistema2.cep;
+
+public class CepApi {
+
+	private static CepApi instancia = new CepApi();
+
+	private CepApi() {
+		super();
+	}
+
+	public static CepApi getInstancia() {
+		return instancia;
+	}
+
+	public String recuperarCidade(String cep) {
+		return "Araraquara";
+	}
+
+	public String recuperarEstado(String cep) {
+		return "SP";
+	}
+}