mindol1004/spring-boot-rest
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'master' of https://github.com/eugenp/tutorials

Browse Source
This commit is contained in:
Ahmed Tawila
2017-11-23 23:24:40 +02:00
parent 960d8e004c ae6daf5124
commit f13048b63e
190 changed files with 3721 additions and 304 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
core-java/README.md
View File

@@ -115,4 +115,8 @@
- [Number of Digits in an Integer in Java](http://www.baeldung.com/java-number-of-digits-in-int)
- [Proxy, Decorator, Adapter and Bridge Patterns](http://www.baeldung.com/java-structural-design-patterns)
- [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
- [A Guide to the Static Keyword in Java](http://www.baeldung.com/java-static)
- [Initializing Arrays in Java](http://www.baeldung.com/java-initialize-array)
- [Guide to Java String Pool](http://www.baeldung.com/java-string-pool)
- [Copy a File with Java](http://www.baeldung.com/java-copy-file)

2
core-java/pom.xml
View File

@@ -460,7 +460,7 @@
<logback.version>1.1.7</logback.version>
<!-- util -->
<guava.version>22.0</guava.version>
<guava.version>23.0</guava.version>
<commons-lang3.version>3.5</commons-lang3.version>
<bouncycastle.version>1.55</bouncycastle.version>
<commons-codec.version>1.10</commons-codec.version>

6
core-java/src/main/java/com/baeldung/designpatterns/creational/abstractfactory/AbstractFactory.java Normal file
View File

@@ -0,0 +1,6 @@
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
View File

@@ -0,0 +1,18 @@
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
View File

@@ -0,0 +1,6 @@
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
View File

@@ -0,0 +1,21 @@
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
View File

@@ -0,0 +1,10 @@
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
View File

@@ -0,0 +1,5 @@
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
View File

@@ -0,0 +1,21 @@
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
View File

@@ -0,0 +1,15 @@
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
View File

@@ -0,0 +1,15 @@
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
View File

@@ -0,0 +1,15 @@
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
View File

@@ -0,0 +1,10 @@
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
View File

@@ -0,0 +1,64 @@
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
View File

@@ -0,0 +1,16 @@
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
View File

@@ -0,0 +1,16 @@
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
View File

@@ -0,0 +1,10 @@
package com.baeldung.designpatterns.creational.factory;
public class Heptagon implements Polygon {
@Override
public String getType() {
return "Heptagon";
}
}

10
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Octagon.java Normal file
View File

@@ -0,0 +1,10 @@
package com.baeldung.designpatterns.creational.factory;
public class Octagon implements Polygon {
@Override
public String getType() {
return "Octagon";
}
}

10
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Pentagon.java Normal file
View File

@@ -0,0 +1,10 @@
package com.baeldung.designpatterns.creational.factory;
public class Pentagon implements Polygon {
@Override
public String getType() {
return "Pentagon";
}
}

5
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Polygon.java Normal file
View File

@@ -0,0 +1,5 @@
package com.baeldung.designpatterns.creational.factory;
public interface Polygon {
String getType();
}

22
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/PolygonFactory.java Normal file
View File

@@ -0,0 +1,22 @@
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;
}
}

10
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Square.java Normal file
View File

@@ -0,0 +1,10 @@
package com.baeldung.designpatterns.creational.factory;
public class Square implements Polygon {
@Override
public String getType() {
return "Square";
}
}

10
core-java/src/main/java/com/baeldung/designpatterns/creational/factory/Triangle.java Normal file
View File

@@ -0,0 +1,10 @@
package com.baeldung.designpatterns.creational.factory;
public class Triangle implements Polygon {
@Override
public String getType() {
return "Triangle";
}
}

13
core-java/src/main/java/com/baeldung/designpatterns/creational/singleton/Singleton.java Normal file
View File

@@ -0,0 +1,13 @@
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;
}
}

8
core-java/src/main/java/com/baeldung/designpatterns/creational/singleton/SingletonDriver.java Normal file
View File

@@ -0,0 +1,8 @@
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
View File

@@ -0,0 +1,43 @@
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));
}
}

23
core-java/src/main/java/com/baeldung/timezonedisplay/TimezoneDisplayJava7App.java Normal file
View File

@@ -0,0 +1,23 @@
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);
}
}
}

70
core-java/src/test/java/com/baeldung/copyfiles/FileCopierTest.java Normal file
View File

@@ -0,0 +1,70 @@
package com.baeldung.copyfiles;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import org.apache.commons.io.FileUtils;
import org.junit.Before;
import org.junit.Test;
import static org.assertj.core.api.Assertions.*;
public class FileCopierTest {
File original = new File("src/test/resources/original.txt");
@Before
public void init() throws IOException {
if (!original.exists())
Files.createFile(original.toPath());
}
@Test
public void givenIoAPI_whenCopied_thenCopyExistsWithSameContents() throws IOException {
File copied = new File("src/test/resources/copiedWithIo.txt");
try (InputStream in = new BufferedInputStream(new FileInputStream(original));
OutputStream out = new BufferedOutputStream(new FileOutputStream(copied))) {
byte[] buffer = new byte[1024];
int lengthRead;
while ((lengthRead = in.read(buffer)) > 0) {
out.write(buffer, 0, lengthRead);
out.flush();
}
}
assertThat(copied).exists();
assertThat(Files.readAllLines(original.toPath()).equals(Files.readAllLines(copied.toPath())));
}
@Test
public void givenCommonsIoAPI_whenCopied_thenCopyExistsWithSameContents() throws IOException {
File copied = new File("src/test/resources/copiedWithApacheCommons.txt");
FileUtils.copyFile(original, copied);
assertThat(copied).exists();
assertThat(Files.readAllLines(original.toPath()).equals(Files.readAllLines(copied.toPath())));
}
@Test
public void givenNIO2_whenCopied_thenCopyExistsWithSameContents() throws IOException {
Path copied = Paths.get("src/test/resources/copiedWithNio.txt");
Path originalPath = original.toPath();
Files.copy(originalPath, copied, StandardCopyOption.REPLACE_EXISTING);
assertThat(copied).exists();
assertThat(Files.readAllLines(originalPath).equals(Files.readAllLines(copied)));
}
@Test
public void givenGuava_whenCopied_thenCopyExistsWithSameContents() throws IOException {
File copied = new File("src/test/resources/copiedWithApacheCommons.txt");
com.google.common.io.Files.copy(original, copied);
assertThat(copied).exists();
assertThat(Files.readAllLines(original.toPath()).equals(Files.readAllLines(copied.toPath())));
}
}

23
core-java/src/test/java/com/baeldung/designpatterns/creational/abstractfactory/AbstractPatternIntegrationTest.java Normal file
View File

@@ -0,0 +1,23 @@
package com.baeldung.designpatterns.creational.abstractfactory;
import static org.junit.Assert.*;
import org.junit.Test;
public class AbstractPatternIntegrationTest {
@Test
public void givenAbstractFactory_whenGettingObjects_thenSuccessful() {
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();
assertEquals("A Dog with brown color Barks", result);
}
}

33
core-java/src/test/java/com/baeldung/designpatterns/creational/builder/BuilderPatternIntegrationTest.java Normal file
View File

@@ -0,0 +1,33 @@
package com.baeldung.designpatterns.creational.builder;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class BuilderPatternIntegrationTest {
@Test
public void whenCreatingObjectThroughBuilder_thenObjectValid() {
BankAccount newAccount = new BankAccount
.BankAccountBuilder("Jon", "22738022275")
.withEmail("jon@example.com")
.wantNewsletter(true)
.build();
assertEquals(newAccount.getName(), "Jon");
assertEquals(newAccount.getAccountNumber(), "22738022275");
assertEquals(newAccount.getEmail(), "jon@example.com");
assertEquals(newAccount.isNewsletter(), true);
}
@Test
public void whenSkippingOptionalParameters_thenObjectValid() {
BankAccount newAccount = new BankAccount
.BankAccountBuilder("Jon", "22738022275")
.build();
assertEquals(newAccount.getName(), "Jon");
assertEquals(newAccount.getAccountNumber(), "22738022275");
assertEquals(newAccount.getEmail(), null);
assertEquals(newAccount.isNewsletter(), false);
}
}

32
core-java/src/test/java/com/baeldung/designpatterns/creational/factory/FactoryIntegrationTest.java Normal file
View File

@@ -0,0 +1,32 @@
package com.baeldung.designpatterns.creational.factory;
import static org.junit.Assert.*;
import org.junit.Test;
public class FactoryIntegrationTest {
@Test
public void whenUsingFactoryForSquare_thenCorrectObjectReturned() {
Polygon p;
PolygonFactory factory = new PolygonFactory();
//get the shape which has 4 sides
p = factory.getPolygon(4);
String result = "The shape with 4 sides is a " + p.getType();
assertEquals("The shape with 4 sides is a Square", result);
}
@Test
public void whenUsingFactoryForOctagon_thenCorrectObjectReturned() {
Polygon p;
PolygonFactory factory = new PolygonFactory();
//get the shape which has 4 sides
p = factory.getPolygon(8);
String result = "The shape with 8 sides is a " + p.getType();
assertEquals("The shape with 8 sides is a Octagon", result);
}
}

26
core-java/src/test/java/com/baeldung/designpatterns/creational/singleton/SingletonIntegrationTest.java Normal file
View File

@@ -0,0 +1,26 @@
package com.baeldung.designpatterns.creational.singleton;
import org.junit.Test;
import static org.junit.Assert.*;
public class SingletonIntegrationTest {
@Test
/**
* Although there is absolutely no way to determine whether
* a class is Singleton, in this test case, we will just
* check for two objects if they point to same instance or
* not. We will also check for their hashcode.
*/
public void whenGettingMultipleObjects_thenAllPointToSame() {
//first object
Singleton obj1 = Singleton.getInstance();
//Second object
Singleton obj2 = Singleton.getInstance();
assertTrue(obj1 == obj2);
assertEquals(obj1.hashCode(), obj2.hashCode());
}
}

14
core-java/src/test/java/com/baeldung/string/formatter/StringFormatterExampleTests.java
View File

@@ -14,7 +14,8 @@ public class StringFormatterExampleTests {
public void givenString_whenFormatSpecifierForCalendar_thenGotExpected() {
//Syntax of Format Specifiers for Date/Time Representation
Calendar c = new GregorianCalendar(2017, 11, 10);
String s = String.format("The date is: %1$tm %1$te,%1$tY", c);
String s = String.format("The date is: %tm %1$te,%1$tY", c);
assertEquals("The date is: 12 10,2017", s);
}
@@ -84,7 +85,7 @@ public class StringFormatterExampleTests {
public void givenString_whenLineSeparatorConversion_thenConvertedString() {
//Line Separator Conversion
String s = String.format("First Line %nSecond Line");
assertEquals("First Line \n"
assertEquals("First Line " + System.getProperty("line.separator")
+ "Second Line", s);
}
@@ -114,10 +115,10 @@ public class StringFormatterExampleTests {
public void givenString_whenSpecifyArgumentIndex_thenGotExpected() {
Calendar c = new GregorianCalendar(2017, 11, 10);
//Argument_Index
String s = String.format("The date is: %1$tm %1$te,%1$tY", c);
String s = String.format("The date is: %tm %1$te,%1$tY", c);
assertEquals("The date is: 12 10,2017", s);
s = String.format("The date is: %1$tm %<te,%<tY", c);
s = String.format("The date is: %tm %<te,%<tY", c);
assertEquals("The date is: 12 10,2017", s);
}
@@ -126,8 +127,7 @@ public class StringFormatterExampleTests {
//Using String Formatter with Appendable
StringBuilder sb = new StringBuilder();
Formatter formatter = new Formatter(sb);
formatter.format("I am writting to a %1$s Instance.", sb.getClass());
formatter.format("I am writting to a %s Instance.", sb.getClass());
assertEquals("I am writting to a class java.lang.StringBuilder Instance.", sb.toString());
}

2
core-java/src/test/resources/original.txt Normal file
View File

@@ -0,0 +1,2 @@
#Copy a File with Java (www.Baeldung.com)
Copying Files with Java is Fun!