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[JAVA-621] core-java-lang-oop-types module

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* Creation

* Moved code from https://www.baeldung.com/java-marker-interfaces

* Moved code from https://www.baeldung.com/java-abstract-class

* Moved code from https://www.baeldung.com/java-this

* Moved code from https://www.baeldung.com/java-nested-classes

* Moved code from https://www.baeldung.com/java-inner-interfaces

* Moved code from https://www.baeldung.com/java-classes-objects

* Moved article references to the new README.md
This commit is contained in:
dupirefr
2020-04-04 10:18:15 +02:00
parent c182eaca8b
commit ea61137058
28 changed files with 50 additions and 7 deletions
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29
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/abstractclasses/application/Application.java
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@@ -1,29 +0,0 @@
package com.baeldung.abstractclasses.application;
import com.baeldung.abstractclasses.filereaders.BaseFileReader;
import com.baeldung.abstractclasses.filereaders.LowercaseFileReader;
import com.baeldung.abstractclasses.filereaders.UppercaseFileReader;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.file.Path;
import java.nio.file.Paths;
public class Application {
public static void main(String[] args) throws IOException, URISyntaxException {
Application application = new Application();
Path path = application.getPathFromResourcesFile("files/test.txt");
BaseFileReader lowercaseFileReader = new LowercaseFileReader(path);
lowercaseFileReader.readFile().forEach(line -> System.out.println(line));
BaseFileReader uppercaseFileReader = new UppercaseFileReader(path);
uppercaseFileReader.readFile().forEach(line -> System.out.println(line));
}
private Path getPathFromResourcesFile(String filePath) throws URISyntaxException {
return Paths.get(getClass().getClassLoader().getResource(filePath).toURI());
}
}

27
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/abstractclasses/filereaders/BaseFileReader.java
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package com.baeldung.abstractclasses.filereaders;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.stream.Collectors;
public abstract class BaseFileReader {
protected Path filePath;
protected BaseFileReader(Path filePath) {
this.filePath = filePath;
}
public Path getFilePath() {
return filePath;
}
public List<String> readFile() throws IOException {
return Files.lines(filePath)
.map(this::mapFileLine).collect(Collectors.toList());
}
protected abstract String mapFileLine(String line);
}

15
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/abstractclasses/filereaders/LowercaseFileReader.java
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package com.baeldung.abstractclasses.filereaders;
import java.nio.file.Path;
public class LowercaseFileReader extends BaseFileReader {
public LowercaseFileReader(Path filePath) {
super(filePath);
}
@Override
public String mapFileLine(String line) {
return line.toLowerCase();
}
}

15
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/abstractclasses/filereaders/UppercaseFileReader.java
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@@ -1,15 +0,0 @@
package com.baeldung.abstractclasses.filereaders;
import java.nio.file.Path;
public class UppercaseFileReader extends BaseFileReader {
public UppercaseFileReader(Path filePath) {
super(filePath);
}
@Override
public String mapFileLine(String line) {
return line.toUpperCase();
}
}

5
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/markerinterface/DeletableShape.java
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@@ -1,5 +0,0 @@
package com.baeldung.markerinterface;
public interface DeletableShape extends Shape {
}

22
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/markerinterface/Rectangle.java
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@@ -1,22 +0,0 @@
package com.baeldung.markerinterface;
public class Rectangle implements DeletableShape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public double getArea() {
return width * height;
}
@Override
public double getCircumference() {
return 2 * (width + height);
}
}

6
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/markerinterface/Shape.java
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@@ -1,6 +0,0 @@
package com.baeldung.markerinterface;
public interface Shape {
double getArea();
double getCircumference();
}

14
core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/markerinterface/ShapeDao.java
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@@ -1,14 +0,0 @@
package com.baeldung.markerinterface;
public class ShapeDao {
public boolean delete(Object object) {
if (!(object instanceof DeletableShape)) {
return false;
}
// Calling the code that deletes the entity from the database
return true;
}
}

20
core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/abstractclasses/test/LowercaseFileReaderUnitTest.java
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@@ -1,20 +0,0 @@
package com.baeldung.abstractclasses.test;
import com.baeldung.abstractclasses.filereaders.BaseFileReader;
import com.baeldung.abstractclasses.filereaders.LowercaseFileReader;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class LowercaseFileReaderUnitTest {
@Test
public void givenLowercaseFileReaderInstance_whenCalledreadFile_thenCorrect() throws Exception {
Path path = Paths.get(getClass().getClassLoader().getResource("files/test.txt").toURI());
BaseFileReader lowercaseFileReader = new LowercaseFileReader(path);
assertThat(lowercaseFileReader.readFile()).isInstanceOf(List.class);
}
}

20
core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/abstractclasses/test/UppercaseFileReaderUnitTest.java
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@@ -1,20 +0,0 @@
package com.baeldung.abstractclasses.test;
import com.baeldung.abstractclasses.filereaders.BaseFileReader;
import com.baeldung.abstractclasses.filereaders.UppercaseFileReader;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class UppercaseFileReaderUnitTest {
@Test
public void givenUppercaseFileReaderInstance_whenCalledreadFile_thenCorrect() throws Exception {
Path path = Paths.get(getClass().getClassLoader().getResource("files/test.txt").toURI());
BaseFileReader uppercaseFileReader = new UppercaseFileReader(path);
assertThat(uppercaseFileReader.readFile()).isInstanceOf(List.class);
}
}

26
core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/markerinterface/MarkerInterfaceUnitTest.java
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package com.baeldung.markerinterface;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class MarkerInterfaceUnitTest {
@Test
public void givenDeletableObjectThenTrueReturned() {
ShapeDao shapeDao = new ShapeDao();
Object rectangle = new Rectangle(2, 3);
boolean result = shapeDao.delete(rectangle);
assertEquals(true, result);
}
@Test
public void givenNonDeletableObjectThenFalseReturned() {
ShapeDao shapeDao = new ShapeDao();
Object object = new Object();
boolean result = shapeDao.delete(object);
assertEquals(false, result);
}
}