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Merge remote-tracking branch 'upstream/master'

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gschambial
2017-11-23 11:49:20 +05:30
parent d954258a80 668f1f1bb3
commit 0a8fd5ed2c
212 changed files with 4448 additions and 356 deletions
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6
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/AbstractFactory.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public interface AbstractFactory {
Animal getAnimal(String toyType) ;
Color getColor(String colorType);
}

18
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/AbstractPatternDriver.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class AbstractPatternDriver {
public static void main(String[] args) {
AbstractFactory abstractFactory;
//creating a brown toy dog
abstractFactory = FactoryProvider.getFactory("Toy");
Animal toy = abstractFactory.getAnimal("Dog");
abstractFactory = FactoryProvider.getFactory("Color");
Color color = abstractFactory.getColor("Brown");
String result = "A " + toy.getType() + " with " + color.getColor() + " color " + toy.makeSound();
System.out.println(result);
}
}

6
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/Animal.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public interface Animal {
String getType();
String makeSound();
}

21
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/AnimalFactory.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class AnimalFactory implements AbstractFactory {
@Override
public Animal getAnimal(String animalType) {
if ("Dog".equalsIgnoreCase(animalType)) {
return new Dog();
} else if ("Duck".equalsIgnoreCase(animalType)) {
return new Duck();
}
return null;
}
@Override
public Color getColor(String color) {
throw new UnsupportedOperationException();
}
}

10
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/Brown.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class Brown implements Color {
@Override
public String getColor() {
return "brown";
}
}

5
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/Color.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public interface Color {
String getColor();
}

21
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/ColorFactory.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class ColorFactory implements AbstractFactory {
@Override
public Color getColor(String colorType) {
if ("Brown".equalsIgnoreCase(colorType)) {
return new Brown();
} else if ("White".equalsIgnoreCase(colorType)) {
return new White();
}
return null;
}
@Override
public Animal getAnimal(String toyType) {
throw new UnsupportedOperationException();
}
}

15
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/Dog.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class Dog implements Animal {
@Override
public String getType() {
return "Dog";
}
@Override
public String makeSound() {
return "Barks";
}
}

15
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/Duck.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class Duck implements Animal {
@Override
public String getType() {
return "Duck";
}
@Override
public String makeSound() {
return "Squeks";
}
}

15
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/FactoryProvider.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class FactoryProvider {
public static AbstractFactory getFactory(String choice){
if("Toy".equalsIgnoreCase(choice)){
return new AnimalFactory();
}
else if("Color".equalsIgnoreCase(choice)){
return new ColorFactory();
}
return null;
}
}

10
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/White.java Normal file
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package com.baeldung.designpatterns.creational.abstractfactory;
public class White implements Color {
@Override
public String getColor() {
return "White";
}
}

64
core-java/src/main/java/com/baeldung/designpatterns/creational/builder/BankAccount.java Normal file
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package com.baeldung.designpatterns.creational.builder;
public class BankAccount {
private String name;
private String accountNumber;
private String email;
private boolean newsletter;
//The constructor that takes a builder from which it will create object
//the access to this is only provided to builder
private BankAccount(BankAccountBuilder builder) {
this.name = builder.name;
this.accountNumber = builder.accountNumber;
this.email = builder.email;
this.newsletter = builder.newsletter;
}
public static class BankAccountBuilder {
private String name;
private String accountNumber;
private String email;
private boolean newsletter;
//All Mandatory parameters goes with this constructor
public BankAccountBuilder(String name, String accountNumber) {
this.name = name;
this.accountNumber = accountNumber;
}
//setters for optional parameters which returns this same builder
//to support fluent design
public BankAccountBuilder withEmail(String email) {
this.email = email;
return this;
}
public BankAccountBuilder wantNewsletter(boolean newsletter) {
this.newsletter = newsletter;
return this;
}
//the actual build method that prepares and returns a BankAccount object
public BankAccount build() {
return new BankAccount(this);
}
}
//getters
public String getName() {
return name;
}
public String getAccountNumber() {
return accountNumber;
}
public String getEmail() {
return email;
}
public boolean isNewsletter() {
return newsletter;
}
}

16
core-java/src/main/java/com/baeldung/designpatterns/creational/builder/BuilderPatternDriver.java Normal file
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package com.baeldung.designpatterns.creational.builder;
public class BuilderPatternDriver {
public static void main(String[] args) {
BankAccount newAccount = new BankAccount
.BankAccountBuilder("Jon", "22738022275")
.withEmail("jon@example.com")
.wantNewsletter(true)
.build();
System.out.println("Name: " + newAccount.getName());
System.out.println("AccountNumber:" + newAccount.getAccountNumber());
System.out.println("Email: " + newAccount.getEmail());
System.out.println("Want News letter?: " + newAccount.isNewsletter());
}
}

16
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/FactoryDriver.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public class FactoryDriver {
public static void main(String[] args) {
Polygon p;
PolygonFactory factory = new PolygonFactory();
//get the shape which has 4 sides
p = factory.getPolygon(4);
System.out.println("The shape with 4 sides is a " + p.getType());
//get the shape which has 4 sides
p = factory.getPolygon(8);
System.out.println("The shape with 8 sides is a " + p.getType());
}
}

10
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Heptagon.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public class Heptagon implements Polygon {
@Override
public String getType() {
return "Heptagon";
}
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Octagon.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public class Octagon implements Polygon {
@Override
public String getType() {
return "Octagon";
}
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Pentagon.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public class Pentagon implements Polygon {
@Override
public String getType() {
return "Pentagon";
}
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Polygon.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public interface Polygon {
String getType();
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/factory/PolygonFactory.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public class PolygonFactory {
public Polygon getPolygon(int numberOfSides) {
if(numberOfSides == 3) {
return new Triangle();
}
if(numberOfSides == 4) {
return new Square();
}
if(numberOfSides == 5) {
return new Pentagon();
}
if(numberOfSides == 4) {
return new Heptagon();
}
else if(numberOfSides == 8) {
return new Octagon();
}
return null;
}
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Square.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public class Square implements Polygon {
@Override
public String getType() {
return "Square";
}
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Triangle.java Normal file
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package com.baeldung.designpatterns.creational.factory;
public class Triangle implements Polygon {
@Override
public String getType() {
return "Triangle";
}
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/singleton/Singleton.java Normal file
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package com.baeldung.designpatterns.creational.singleton;
public class Singleton {
private Singleton() {}
private static class SingletonHolder {
public static final Singleton instance = new Singleton();
}
public static Singleton getInstance() {
return SingletonHolder.instance;
}
}

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core-java/src/main/java/com/baeldung/designpatterns/creational/singleton/SingletonDriver.java Normal file
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package com.baeldung.designpatterns.creational.singleton;
public class SingletonDriver {
public static void main(String[] args) {
Singleton instance = Singleton.getInstance();
System.out.println(instance.toString());
}
}

43
core-java/src/main/java/com/baeldung/timezonedisplay/TimezoneDisplayJava7.java Normal file
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package com.baeldung.timezonedisplay;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
public class TimezoneDisplayJava7 {
public enum OffsetBase {
GMT, UTC
}
public List<String> getTimeZoneList(TimezoneDisplayJava7.OffsetBase base) {
String[] availableZoneIds = TimeZone.getAvailableIDs();
List<String> result = new ArrayList<>(availableZoneIds.length);
for (String zoneId : availableZoneIds) {
TimeZone curTimeZone = TimeZone.getTimeZone(zoneId);
String offset = calculateOffset(curTimeZone.getRawOffset());
result.add(String.format("(%s%s) %s", base, offset, zoneId));
}
Collections.sort(result);
return result;
}
private String calculateOffset(int rawOffset) {
if (rawOffset == 0) {
return "+00:00";
}
long hours = TimeUnit.MILLISECONDS.toHours(rawOffset);
long minutes = TimeUnit.MILLISECONDS.toMinutes(rawOffset);
minutes = Math.abs(minutes - TimeUnit.HOURS.toMinutes(hours));
return String.format("%+03d:%02d", hours, Math.abs(minutes));
}
}

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core-java/src/main/java/com/baeldung/timezonedisplay/TimezoneDisplayJava7App.java Normal file
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package com.baeldung.timezonedisplay;
import java.util.List;
public class TimezoneDisplayJava7App {
public static void main(String... args) {
TimezoneDisplayJava7 display = new TimezoneDisplayJava7();
System.out.println("Time zones in UTC:");
List<String> utc = display.getTimeZoneList(TimezoneDisplayJava7.OffsetBase.UTC);
for (String timeZone : utc) {
System.out.println(timeZone);
}
System.out.println("Time zones in GMT:");
List<String> gmt = display.getTimeZoneList(TimezoneDisplayJava7.OffsetBase.GMT);
for (String timeZone : gmt) {
System.out.println(timeZone);
}
}
}