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‎README.md

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‎adapter_design_pattern/AdapterPattern.java

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package adapter_design_pattern;
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interface WebDriver
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{
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public void getElement();
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public void selectElement();
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}
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class ChromeDriver implements WebDriver
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{
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@Override
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public void getElement()
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{
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System.out.println("Get element from ChromeDriver");
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}
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@Override
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public void selectElement()
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{
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System.out.println("Select element from ChromeDriver");
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}
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}
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class IEDriver
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{
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public void findElement()
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{
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System.out.println("Find element from IEDriver");
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}
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public void clickElement()
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{
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System.out.println("Click element from IEDriver");
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}
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}
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class WebDriverAdapter implements WebDriver
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{
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IEDriver ieDriver;
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public WebDriverAdapter(IEDriver ieDriver)
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{
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this.ieDriver = ieDriver;
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}
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@Override
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public void getElement()
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{
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ieDriver.findElement();
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}
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@Override
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public void selectElement()
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{
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ieDriver.clickElement();
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}
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}
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public class AdapterPattern
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{
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public static void main(String[] args)
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{
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ChromeDriver a = new ChromeDriver();
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a.getElement();
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a.selectElement();
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IEDriver e = new IEDriver();
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e.findElement();
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e.clickElement();
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WebDriver wID = new WebDriverAdapter(e);
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wID.getElement();
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wID.selectElement();
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}
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}

‎bridge_design_pattern/BridgePattern.java

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package bridge_design_pattern;
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abstract class TV
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{
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Remote remote;
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TV(Remote r)
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{
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this.remote = r;
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}
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abstract void on();
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abstract void off();
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}
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class Sony extends TV
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{
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Remote remoteType;
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Sony(Remote r)
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{
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super(r);
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this.remoteType = r;
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}
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public void on()
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{
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System.out.print("Sony TV ON: ");
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remoteType.on();
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}
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public void off()
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{
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System.out.print("Sony TV OFF: ");
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remoteType.off();
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}
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}
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class Philips extends TV
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{
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Remote remoteType;
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Philips(Remote r)
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{
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super(r);
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this.remoteType = r;
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}
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public void on()
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{
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System.out.print("Philips TV ON: ");
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remoteType.on();
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}
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public void off()
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{
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System.out.print("Philips TV OFF: ");
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remoteType.off();
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}
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}
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interface Remote
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{
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public void on();
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public void off();
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}
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class OldRemote implements Remote
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{
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@Override
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public void on()
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{
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System.out.println("ON with Old Remote");
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}
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@Override
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public void off()
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{
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System.out.println("OFF with old Remote");
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}
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}
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class NewRemote implements Remote
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{
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@Override
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public void on()
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{
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System.out.println("ON with New Remote");
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}
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@Override
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public void off()
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{
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System.out.println("OFF with New Remote");
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}
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}
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public class BridgePattern
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{
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public static void main(String[] args)
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{
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TV sonyOldRemote = new Sony(new OldRemote());
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sonyOldRemote.on();
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sonyOldRemote.off();
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System.out.println();
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TV sonyNewRemote = new Sony(new NewRemote());
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sonyNewRemote.on();
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sonyNewRemote.off();
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System.out.println();
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TV philipsOldRemote = new Philips(new OldRemote());
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philipsOldRemote.on();
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philipsOldRemote.off();
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System.out.println();
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TV philipsNewRemote = new Philips(new NewRemote());
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philipsNewRemote.on();
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philipsNewRemote.off();
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}
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}

‎builder_design_pattern/BuilderPattern.java

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package builder_design_pattern;
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class Vehicle
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{
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private String engine;
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private int wheel;
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private int airbags;
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public String getEngine()
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{
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return this.engine;
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}
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public int getWheel()
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{
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return this.wheel;
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}
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public int getAirbags()
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{
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return this.airbags;
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}
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private Vehicle(VehicleBuilder builder)
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{
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this.engine = builder.engine;
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this.wheel = builder.wheel;
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this.airbags = builder.airbags;
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}
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public static class VehicleBuilder
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{
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private String engine;
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private int wheel;
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private int airbags;
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public VehicleBuilder(String engine, int wheel)
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{
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this.engine = engine;
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this.wheel = wheel;
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}
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public VehicleBuilder setAirbags(int airbags)
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{
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this.airbags = airbags;
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return this;
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}
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public Vehicle build()
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{
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return new Vehicle(this);
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}
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}
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}
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public class BuilderPattern
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{
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public static void main(String[] args)
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{
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Vehicle car = new Vehicle.VehicleBuilder("1500cc", 4).setAirbags(4).build();
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Vehicle bike = new Vehicle.VehicleBuilder("250cc", 2).build();
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System.out.println(car.getEngine());
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System.out.println(car.getWheel());
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System.out.println(car.getAirbags());
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System.out.println(bike.getEngine());
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System.out.println(bike.getWheel());
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System.out.println(bike.getAirbags());
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}
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}

‎composite_design_pattern/CompositePattern.java

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package composite_design_pattern;
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import java.util.ArrayList;
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import java.util.List;
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abstract class Account
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{
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public abstract float getBalance();
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}
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class DepositeAccount extends Account
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{
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private String accountNo;
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private float accountBalance;
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public DepositeAccount(String accountNo, float accountBalance)
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{
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super();
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this.accountNo = accountNo;
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this.accountBalance = accountBalance;
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}
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public float getBalance()
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{
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return accountBalance;
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}
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}
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class SavingAccount extends Account
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{
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private String accountNo;
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private float accountBalance;
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public SavingAccount(String accountNo, float accountBalance)
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{
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super();
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this.accountNo = accountNo;
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this.accountBalance = accountBalance;
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}
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public float getBalance()
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{
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return accountBalance;
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}
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}
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class CompositeAccount extends Account
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{
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private float totalBalance;
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private List<Account> accountList = new ArrayList<Account>();
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public float getBalance()
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{
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totalBalance = 0;
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for (Account f : accountList)
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{
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totalBalance = totalBalance + f.getBalance();
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}
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return totalBalance;
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}
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public void addAccount(Account acc)
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{
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accountList.add(acc);
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}
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public void removeAccount(Account acc)
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{
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accountList.add(acc);
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}
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}
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public class CompositePattern
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{
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public static void main(String[] args)
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{
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CompositeAccount component = new CompositeAccount();
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component.addAccount(new DepositeAccount("DA001", 100));
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component.addAccount(new DepositeAccount("DA002", 150));
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component.addAccount(new SavingAccount("SA001", 200));
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float totalBalance = component.getBalance();
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System.out.println("Total Balance : " + totalBalance);
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}
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}

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