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cleanup work

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This commit is contained in:
eugenp
2016-10-25 11:09:51 +03:00
parent a44be73deb
commit 2ab201d639
49 changed files with 489 additions and 653 deletions
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core-java/src/main/java/com/baeldung/datetime/UseDuration.java
+4 -4
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@@ -5,12 +5,12 @@ import java.time.LocalTime;
import java.time.Period;
public class UseDuration {
public LocalTime modifyDates(LocalTime localTime,Duration duration){
public LocalTime modifyDates(LocalTime localTime, Duration duration) {
return localTime.plus(duration);
}
public Duration getDifferenceBetweenDates(LocalTime localTime1,LocalTime localTime2){
public Duration getDifferenceBetweenDates(LocalTime localTime1, LocalTime localTime2) {
return Duration.between(localTime1, localTime2);
}
}
core-java/src/main/java/com/baeldung/datetime/UseLocalDate.java
+16 -16
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@@ -7,39 +7,39 @@ import java.time.temporal.ChronoUnit;
import java.time.temporal.TemporalAdjusters;
public class UseLocalDate {
public LocalDate getLocalDateUsingFactoryOfMethod(int year, int month, int dayOfMonth){
public LocalDate getLocalDateUsingFactoryOfMethod(int year, int month, int dayOfMonth) {
return LocalDate.of(year, month, dayOfMonth);
}
public LocalDate getLocalDateUsingParseMethod(String representation){
public LocalDate getLocalDateUsingParseMethod(String representation) {
return LocalDate.parse(representation);
}
public LocalDate getLocalDateFromClock(){
public LocalDate getLocalDateFromClock() {
LocalDate localDate = LocalDate.now();
return localDate;
}
public LocalDate getNextDay(LocalDate localDate){
public LocalDate getNextDay(LocalDate localDate) {
return localDate.plusDays(1);
}
public LocalDate getPreviousDay(LocalDate localDate){
public LocalDate getPreviousDay(LocalDate localDate) {
return localDate.minus(1, ChronoUnit.DAYS);
}
public DayOfWeek getDayOfWeek(LocalDate localDate){
public DayOfWeek getDayOfWeek(LocalDate localDate) {
DayOfWeek day = localDate.getDayOfWeek();
return day;
}
public LocalDate getFirstDayOfMonth(){
public LocalDate getFirstDayOfMonth() {
LocalDate firstDayOfMonth = LocalDate.now().with(TemporalAdjusters.firstDayOfMonth());
return firstDayOfMonth;
}
public LocalDateTime getStartOfDay(LocalDate localDate){
public LocalDateTime getStartOfDay(LocalDate localDate) {
LocalDateTime startofDay = localDate.atStartOfDay();
return startofDay;
}
core-java/src/main/java/com/baeldung/datetime/UseLocalDateTime.java
+2 -2
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@@ -3,8 +3,8 @@ package com.baeldung.datetime;
import java.time.LocalDateTime;
public class UseLocalDateTime {
public LocalDateTime getLocalDateTimeUsingParseMethod(String representation){
public LocalDateTime getLocalDateTimeUsingParseMethod(String representation) {
return LocalDateTime.parse(representation);
}
core-java/src/main/java/com/baeldung/datetime/UseLocalTime.java
+13 -13
View File
@@ -4,32 +4,32 @@ import java.time.LocalTime;
import java.time.temporal.ChronoUnit;
public class UseLocalTime {
public LocalTime getLocalTimeUsingFactoryOfMethod(int hour, int min, int seconds){
public LocalTime getLocalTimeUsingFactoryOfMethod(int hour, int min, int seconds) {
LocalTime localTime = LocalTime.of(hour, min, seconds);
return localTime;
}
public LocalTime getLocalTimeUsingParseMethod(String timeRepresentation){
public LocalTime getLocalTimeUsingParseMethod(String timeRepresentation) {
LocalTime localTime = LocalTime.parse(timeRepresentation);
return localTime;
}
public LocalTime getLocalTimeFromClock(){
public LocalTime getLocalTimeFromClock() {
LocalTime localTime = LocalTime.now();
return localTime;
}
public LocalTime addAnHour(LocalTime localTime){
LocalTime newTime = localTime.plus(1,ChronoUnit.HOURS);
public LocalTime addAnHour(LocalTime localTime) {
LocalTime newTime = localTime.plus(1, ChronoUnit.HOURS);
return newTime;
}
public int getHourFromLocalTime(LocalTime localTime){
public int getHourFromLocalTime(LocalTime localTime) {
return localTime.getHour();
}
public LocalTime getLocalTimeWithMinuteSetToValue(LocalTime localTime, int minute){
public LocalTime getLocalTimeWithMinuteSetToValue(LocalTime localTime, int minute) {
return localTime.withMinute(minute);
}
}
core-java/src/main/java/com/baeldung/datetime/UsePeriod.java
+4 -4
View File
@@ -4,12 +4,12 @@ import java.time.LocalDate;
import java.time.Period;
public class UsePeriod {
public LocalDate modifyDates(LocalDate localDate,Period period){
public LocalDate modifyDates(LocalDate localDate, Period period) {
return localDate.plus(period);
}
public Period getDifferenceBetweenDates(LocalDate localDate1,LocalDate localDate2){
public Period getDifferenceBetweenDates(LocalDate localDate1, LocalDate localDate2) {
return Period.between(localDate1, localDate2);
}
}
core-java/src/main/java/com/baeldung/datetime/UseToInstant.java
+4 -4
View File
@@ -6,13 +6,13 @@ import java.util.Calendar;
import java.util.Date;
public class UseToInstant {
public LocalDateTime convertDateToLocalDate(Date date){
public LocalDateTime convertDateToLocalDate(Date date) {
LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
return localDateTime;
}
public LocalDateTime convertDateToLocalDate(Calendar calendar){
public LocalDateTime convertDateToLocalDate(Calendar calendar) {
LocalDateTime localDateTime = LocalDateTime.ofInstant(calendar.toInstant(), ZoneId.systemDefault());
return localDateTime;
}
core-java/src/main/java/com/baeldung/datetime/UseZonedDateTime.java
+2 -2
View File
@@ -5,8 +5,8 @@ import java.time.ZoneId;
import java.time.ZonedDateTime;
public class UseZonedDateTime {
public ZonedDateTime getZonedDateTime(LocalDateTime localDateTime,ZoneId zoneId){
public ZonedDateTime getZonedDateTime(LocalDateTime localDateTime, ZoneId zoneId) {
ZonedDateTime zonedDateTime = ZonedDateTime.of(localDateTime, zoneId);
return zonedDateTime;
}
core-java/src/main/java/com/baeldung/enums/Pizza.java
+2 -5
View File
@@ -7,8 +7,7 @@ import java.util.stream.Collectors;
public class Pizza {
private static EnumSet<PizzaStatusEnum> deliveredPizzaStatuses =
EnumSet.of(PizzaStatusEnum.DELIVERED);
private static EnumSet<PizzaStatusEnum> deliveredPizzaStatuses = EnumSet.of(PizzaStatusEnum.DELIVERED);
private PizzaStatusEnum status;
@@ -76,9 +75,7 @@ public class Pizza {
}
public static EnumMap<PizzaStatusEnum, List<Pizza>> groupPizzaByStatus(List<Pizza> pzList) {
return pzList.stream().collect(
Collectors.groupingBy(Pizza::getStatus,
() -> new EnumMap<>(PizzaStatusEnum.class), Collectors.toList()));
return pzList.stream().collect(Collectors.groupingBy(Pizza::getStatus, () -> new EnumMap<>(PizzaStatusEnum.class), Collectors.toList()));
}
public void deliver() {
core-java/src/main/java/com/baeldung/enums/PizzaDeliverySystemConfiguration.java
-1
View File
@@ -1,6 +1,5 @@
package com.baeldung.enums;
public enum PizzaDeliverySystemConfiguration {
INSTANCE;
core-java/src/main/java/com/baeldung/forkjoin/CustomRecursiveAction.java
+1 -2
View File
@@ -30,8 +30,7 @@ public class CustomRecursiveAction extends RecursiveAction {
private Collection<CustomRecursiveAction> createSubtasks() {
List<CustomRecursiveAction> subtasks =
new ArrayList<>();
List<CustomRecursiveAction> subtasks = new ArrayList<>();
String partOne = workLoad.substring(0, workLoad.length() / 2);
String partTwo = workLoad.substring(workLoad.length() / 2, workLoad.length());
core-java/src/main/java/com/baeldung/forkjoin/CustomRecursiveTask.java
+4 -13
View File
@@ -1,6 +1,5 @@
package com.baeldung.forkjoin;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
@@ -23,10 +22,7 @@ public class CustomRecursiveTask extends RecursiveTask<Integer> {
if (arr.length > THRESHOLD) {
return ForkJoinTask.invokeAll(createSubtasks())
.stream()
.mapToInt(ForkJoinTask::join)
.sum();
return ForkJoinTask.invokeAll(createSubtasks()).stream().mapToInt(ForkJoinTask::join).sum();
} else {
return processing(arr);
@@ -35,17 +31,12 @@ public class CustomRecursiveTask extends RecursiveTask<Integer> {
private Collection<CustomRecursiveTask> createSubtasks() {
List<CustomRecursiveTask> dividedTasks = new ArrayList<>();
dividedTasks.add(new CustomRecursiveTask(
Arrays.copyOfRange(arr, 0, arr.length / 2)));
dividedTasks.add(new CustomRecursiveTask(
Arrays.copyOfRange(arr, arr.length / 2, arr.length)));
dividedTasks.add(new CustomRecursiveTask(Arrays.copyOfRange(arr, 0, arr.length / 2)));
dividedTasks.add(new CustomRecursiveTask(Arrays.copyOfRange(arr, arr.length / 2, arr.length)));
return dividedTasks;
}
private Integer processing(int[] arr) {
return Arrays.stream(arr)
.filter(a -> a > 10 && a < 27)
.map(a -> a * 10)
.sum();
return Arrays.stream(arr).filter(a -> a > 10 && a < 27).map(a -> a * 10).sum();
}
}
core-java/src/main/java/com/baeldung/forkjoin/util/PoolUtil.java
-1
View File
@@ -1,6 +1,5 @@
package com.baeldung.forkjoin.util;
import java.util.concurrent.ForkJoinPool;
public class PoolUtil {
core-java/src/main/java/com/baeldung/java/nio/selector/EchoServer.java
+1 -1
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@@ -15,7 +15,7 @@ public class EchoServer {
public static void main(String[] args)
throws IOException {
throws IOException {
Selector selector = Selector.open();
ServerSocketChannel serverSocket = ServerSocketChannel.open();
serverSocket.bind(new InetSocketAddress("localhost", 5454));
core-java/src/main/java/com/baeldung/java_8_features/Vehicle.java
+1 -1
View File
@@ -9,7 +9,7 @@ public interface Vehicle {
}
default long[] startPosition() {
return new long[]{23, 15};
return new long[] { 23, 15 };
}
default String getOverview() {
core-java/src/main/java/com/baeldung/java_8_features/VehicleImpl.java
+2 -2
View File
@@ -1,9 +1,9 @@
package com.baeldung.java_8_features;
public class VehicleImpl implements Vehicle {
public class VehicleImpl implements Vehicle {
@Override
public void moveTo(long altitude, long longitude) {
//do nothing
// do nothing
}
}
core-java/src/main/java/com/baeldung/socket/EchoClient.java
+29 -30
View File
@@ -4,39 +4,38 @@ import java.io.*;
import java.net.*;
public class EchoClient {
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
public void startConnection(String ip, int port) {
try {
clientSocket = new Socket(ip, port);
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
clientSocket.getInputStream()));
} catch (IOException e) {
System.out.print(e);
}
public void startConnection(String ip, int port) {
try {
clientSocket = new Socket(ip, port);
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
} catch (IOException e) {
System.out.print(e);
}
}
}
public String sendMessage(String msg) {
try {
out.println(msg);
return in.readLine();
} catch (Exception e) {
return null;
}
}
public String sendMessage(String msg) {
try {
out.println(msg);
return in.readLine();
} catch (Exception e) {
return null;
}
}
public void stopConnection() {
try {
in.close();
out.close();
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
public void stopConnection() {
try {
in.close();
out.close();
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
core-java/src/main/java/com/baeldung/socket/EchoMultiServer.java
+50 -51
View File
@@ -4,68 +4,67 @@ import java.net.*;
import java.io.*;
public class EchoMultiServer {
private ServerSocket serverSocket;
private ServerSocket serverSocket;
public void start(int port) {
try {
serverSocket = new ServerSocket(port);
while (true)
new EchoClientHandler(serverSocket.accept()).run();
public void start(int port) {
try {
serverSocket = new ServerSocket(port);
while (true)
new EchoClientHandler(serverSocket.accept()).run();
} catch (IOException e) {
e.printStackTrace();
} finally {
stop();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
stop();
}
}
}
public void stop() {
try {
public void stop() {
try {
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private static class EchoClientHandler extends Thread {
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
private static class EchoClientHandler extends Thread {
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
public EchoClientHandler(Socket socket) {
this.clientSocket = socket;
}
public EchoClientHandler(Socket socket) {
this.clientSocket = socket;
}
public void run() {
try {
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
clientSocket.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
if (".".equals(inputLine)) {
out.println("bye");
break;
}
out.println(inputLine);
}
public void run() {
try {
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
if (".".equals(inputLine)) {
out.println("bye");
break;
}
out.println(inputLine);
}
in.close();
out.close();
clientSocket.close();
in.close();
out.close();
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
EchoMultiServer server = new EchoMultiServer();
server.start(5555);
}
public static void main(String[] args) {
EchoMultiServer server = new EchoMultiServer();
server.start(5555);
}
}
core-java/src/main/java/com/baeldung/socket/EchoServer.java
+36 -37
View File
@@ -4,47 +4,46 @@ import java.net.*;
import java.io.*;
public class EchoServer {
private ServerSocket serverSocket;
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
private ServerSocket serverSocket;
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
public void start(int port) {
try {
serverSocket = new ServerSocket(port);
clientSocket = serverSocket.accept();
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
clientSocket.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
if (".".equals(inputLine)) {
out.println("good bye");
break;
}
out.println(inputLine);
}
} catch (IOException e) {
e.printStackTrace();
}
public void start(int port) {
try {
serverSocket = new ServerSocket(port);
clientSocket = serverSocket.accept();
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
if (".".equals(inputLine)) {
out.println("good bye");
break;
}
out.println(inputLine);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void stop() {
try {
in.close();
out.close();
clientSocket.close();
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
public void stop() {
try {
in.close();
out.close();
clientSocket.close();
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
EchoServer server = new EchoServer();
server.start(4444);
}
public static void main(String[] args) {
EchoServer server = new EchoServer();
server.start(4444);
}
}
core-java/src/main/java/com/baeldung/socket/GreetClient.java
+29 -30
View File
@@ -7,39 +7,38 @@ import java.io.PrintWriter;
import java.net.Socket;
public class GreetClient {
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
public void startConnection(String ip, int port) {
try {
clientSocket = new Socket(ip, port);
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
clientSocket.getInputStream()));
} catch (IOException e) {
}
public void startConnection(String ip, int port) {
try {
clientSocket = new Socket(ip, port);
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
} catch (IOException e) {
}
}
public String sendMessage(String msg) {
try {
out.println(msg);
return in.readLine();
} catch (Exception e) {
return null;
}
}
}
public void stopConnection() {
try {
in.close();
out.close();
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public String sendMessage(String msg) {
try {
out.println(msg);
return in.readLine();
} catch (Exception e) {
return null;
}
}
public void stopConnection() {
try {
in.close();
out.close();
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
core-java/src/main/java/com/baeldung/socket/GreetServer.java
+33 -34
View File
@@ -4,44 +4,43 @@ import java.net.*;
import java.io.*;
public class GreetServer {
private ServerSocket serverSocket;
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
private ServerSocket serverSocket;
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
public void start(int port) {
try {
serverSocket = new ServerSocket(port);
clientSocket = serverSocket.accept();
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String greeting = in.readLine();
if ("hello server".equals(greeting))
out.println("hello client");
else
out.println("unrecognised greeting");
} catch (IOException e) {
e.printStackTrace();
}
public void start(int port) {
try {
serverSocket = new ServerSocket(port);
clientSocket = serverSocket.accept();
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
clientSocket.getInputStream()));
String greeting = in.readLine();
if ("hello server".equals(greeting))
out.println("hello client");
else
out.println("unrecognised greeting");
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void stop() {
try {
in.close();
out.close();
clientSocket.close();
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
public void stop() {
try {
in.close();
out.close();
clientSocket.close();
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
GreetServer server=new GreetServer();
server.start(6666);
}
public static void main(String[] args) {
GreetServer server = new GreetServer();
server.start(6666);
}
}
core-java/src/main/java/com/baeldung/streamApi/Product.java
-1
View File
@@ -44,7 +44,6 @@ public class Product {
this.name = name;
}
public static Stream<String> streamOf(List<String> list) {
return (list == null || list.isEmpty()) ? Stream.empty() : list.stream();
}
core-java/src/main/java/com/baeldung/threadpool/CountingTask.java
+1 -3
View File
@@ -14,9 +14,7 @@ public class CountingTask extends RecursiveTask<Integer> {
@Override
protected Integer compute() {
return node.value + node.children.stream()
.map(childNode -> new CountingTask(childNode).fork())
.collect(Collectors.summingInt(ForkJoinTask::join));
return node.value + node.children.stream().map(childNode -> new CountingTask(childNode).fork()).collect(Collectors.summingInt(ForkJoinTask::join));
}
}
core-java/src/main/java/org/baeldung/executable/ExecutableMavenJar.java
+3 -3
View File
@@ -4,8 +4,8 @@ import javax.swing.JOptionPane;
public class ExecutableMavenJar {
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "It worked!", "Executable Jar with Maven", 1);
}
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "It worked!", "Executable Jar with Maven", 1);
}
}
core-java/src/test/java/com/baeldung/CharToStringTest.java
+5 -5
View File
@@ -7,7 +7,7 @@ import static org.assertj.core.api.Assertions.assertThat;
public class CharToStringTest {
@Test
public void givenChar_whenCallingStringValueOf_shouldConvertToString(){
public void givenChar_whenCallingStringValueOf_shouldConvertToString() {
final char givenChar = 'x';
final String result = String.valueOf(givenChar);
@@ -16,7 +16,7 @@ public class CharToStringTest {
}
@Test
public void givenChar_whenCallingToStringOnCharacter_shouldConvertToString(){
public void givenChar_whenCallingToStringOnCharacter_shouldConvertToString() {
final char givenChar = 'x';
final String result = Character.toString(givenChar);
@@ -25,7 +25,7 @@ public class CharToStringTest {
}
@Test
public void givenChar_whenCallingCharacterConstructor_shouldConvertToString3(){
public void givenChar_whenCallingCharacterConstructor_shouldConvertToString3() {
final char givenChar = 'x';
final String result = new Character(givenChar).toString();
@@ -34,7 +34,7 @@ public class CharToStringTest {
}
@Test
public void givenChar_whenConcatenated_shouldConvertToString4(){
public void givenChar_whenConcatenated_shouldConvertToString4() {
final char givenChar = 'x';
final String result = givenChar + "";
@@ -43,7 +43,7 @@ public class CharToStringTest {
}
@Test
public void givenChar_whenFormated_shouldConvertToString5(){
public void givenChar_whenFormated_shouldConvertToString5() {
final char givenChar = 'x';
final String result = String.format("%c", givenChar);
core-java/src/test/java/com/baeldung/RandomListElementTest.java → core-java/src/test/java/com/baeldung/RandomListElementUnitTest.java
+2 -2
View File
@@ -6,7 +6,7 @@ import org.junit.Test;
import java.util.*;
import java.util.concurrent.ThreadLocalRandom;
public class RandomListElementTest {
public class RandomListElementUnitTest {
@Test
public void givenList_whenRandomIndexChosen_shouldReturnARandomElementUsingRandom() {
@@ -20,7 +20,7 @@ public class RandomListElementTest {
public void givenList_whenRandomIndexChosen_shouldReturnARandomElementUsingMathRandom() {
List<Integer> givenList = Lists.newArrayList(1, 2, 3);
givenList.get((int)(Math.random() * givenList.size()));
givenList.get((int) (Math.random() * givenList.size()));
}
@Test
core-java/src/test/java/com/baeldung/StringToIntOrIntegerTest.java → core-java/src/test/java/com/baeldung/StringToIntOrIntegerUnitTest.java
+5 -5
View File
@@ -1,11 +1,12 @@
package com.baeldung;
import com.google.common.primitives.Ints;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class StringToIntOrIntegerTest {
import org.junit.Test;
import com.google.common.primitives.Ints;
public class StringToIntOrIntegerUnitTest {
@Test
public void givenString_whenParsingInt_shouldConvertToInt() {
@@ -16,7 +17,6 @@ public class StringToIntOrIntegerTest {
assertThat(result).isEqualTo(42);
}
@Test
public void givenString_whenCallingIntegerValueOf_shouldConvertToInt() {
String givenString = "42";
core-java/src/test/java/com/baeldung/collectors/Java8CollectorsTest.java
+42 -97
View File
@@ -42,192 +42,137 @@ public class Java8CollectorsTest {
@Test
public void whenCollectingToList_shouldCollectToList() throws Exception {
final List<String> result = givenList.stream()
.collect(toList());
final List<String> result = givenList.stream().collect(toList());
assertThat(result)
.containsAll(givenList);
assertThat(result).containsAll(givenList);
}
@Test
public void whenCollectingToList_shouldCollectToSet() throws Exception {
final Set<String> result = givenList.stream()
.collect(toSet());
final Set<String> result = givenList.stream().collect(toSet());
assertThat(result)
.containsAll(givenList);
assertThat(result).containsAll(givenList);
}
@Test
public void whenCollectingToCollection_shouldCollectToCollection() throws Exception {
final List<String> result = givenList.stream()
.collect(toCollection(LinkedList::new));
final List<String> result = givenList.stream().collect(toCollection(LinkedList::new));
assertThat(result)
.containsAll(givenList)
.isInstanceOf(LinkedList.class);
assertThat(result).containsAll(givenList).isInstanceOf(LinkedList.class);
}
@Test
public void whenCollectingToImmutableCollection_shouldThrowException() throws Exception {
assertThatThrownBy(() -> {
givenList.stream()
.collect(toCollection(ImmutableList::of));
givenList.stream().collect(toCollection(ImmutableList::of));
}).isInstanceOf(UnsupportedOperationException.class);
}
@Test
public void whenCollectingToMap_shouldCollectToMap() throws Exception {
final Map<String, Integer> result = givenList.stream()
.collect(toMap(Function.identity(), String::length));
final Map<String, Integer> result = givenList.stream().collect(toMap(Function.identity(), String::length));
assertThat(result)
.containsEntry("a", 1)
.containsEntry("bb", 2)
.containsEntry("ccc", 3)
.containsEntry("dd", 2);
assertThat(result).containsEntry("a", 1).containsEntry("bb", 2).containsEntry("ccc", 3).containsEntry("dd", 2);
}
@Test
public void whenCollectingToMap_shouldCollectToMapMerging() throws Exception {
final Map<String, Integer> result = givenList.stream()
.collect(toMap(Function.identity(), String::length, (i1, i2) -> i1));
final Map<String, Integer> result = givenList.stream().collect(toMap(Function.identity(), String::length, (i1, i2) -> i1));
assertThat(result)
.containsEntry("a", 1)
.containsEntry("bb", 2)
.containsEntry("ccc", 3)
.containsEntry("dd", 2);
assertThat(result).containsEntry("a", 1).containsEntry("bb", 2).containsEntry("ccc", 3).containsEntry("dd", 2);
}
@Test
public void whenCollectingAndThen_shouldCollect() throws Exception {
final List<String> result = givenList.stream()
.collect(collectingAndThen(toList(), ImmutableList::copyOf));
final List<String> result = givenList.stream().collect(collectingAndThen(toList(), ImmutableList::copyOf));
assertThat(result)
.containsAll(givenList)
.isInstanceOf(ImmutableList.class);
assertThat(result).containsAll(givenList).isInstanceOf(ImmutableList.class);
}
@Test
public void whenJoining_shouldJoin() throws Exception {
final String result = givenList.stream()
.collect(joining());
final String result = givenList.stream().collect(joining());
assertThat(result)
.isEqualTo("abbcccdd");
assertThat(result).isEqualTo("abbcccdd");
}
@Test
public void whenJoiningWithSeparator_shouldJoinWithSeparator() throws Exception {
final String result = givenList.stream()
.collect(joining(" "));
final String result = givenList.stream().collect(joining(" "));
assertThat(result)
.isEqualTo("a bb ccc dd");
assertThat(result).isEqualTo("a bb ccc dd");
}
@Test
public void whenJoiningWithSeparatorAndPrefixAndPostfix_shouldJoinWithSeparatorPrePost() throws Exception {
final String result = givenList.stream()
.collect(joining(" ", "PRE-", "-POST"));
final String result = givenList.stream().collect(joining(" ", "PRE-", "-POST"));
assertThat(result)
.isEqualTo("PRE-a bb ccc dd-POST");
assertThat(result).isEqualTo("PRE-a bb ccc dd-POST");
}
@Test
public void whenPartitioningBy_shouldPartition() throws Exception {
final Map<Boolean, List<String>> result = givenList.stream()
.collect(partitioningBy(s -> s.length() > 2));
final Map<Boolean, List<String>> result = givenList.stream().collect(partitioningBy(s -> s.length() > 2));
assertThat(result)
.containsKeys(true, false)
.satisfies(booleanListMap -> {
assertThat(booleanListMap.get(true))
.contains("ccc");
assertThat(result).containsKeys(true, false).satisfies(booleanListMap -> {
assertThat(booleanListMap.get(true)).contains("ccc");
assertThat(booleanListMap.get(false))
.contains("a", "bb", "dd");
});
assertThat(booleanListMap.get(false)).contains("a", "bb", "dd");
});
}
@Test
public void whenCounting_shouldCount() throws Exception {
final Long result = givenList.stream()
.collect(counting());
final Long result = givenList.stream().collect(counting());
assertThat(result)
.isEqualTo(4);
assertThat(result).isEqualTo(4);
}
@Test
public void whenSummarizing_shouldSummarize() throws Exception {
final DoubleSummaryStatistics result = givenList.stream()
.collect(summarizingDouble(String::length));
final DoubleSummaryStatistics result = givenList.stream().collect(summarizingDouble(String::length));
assertThat(result.getAverage())
.isEqualTo(2);
assertThat(result.getCount())
.isEqualTo(4);
assertThat(result.getMax())
.isEqualTo(3);
assertThat(result.getMin())
.isEqualTo(1);
assertThat(result.getSum())
.isEqualTo(8);
assertThat(result.getAverage()).isEqualTo(2);
assertThat(result.getCount()).isEqualTo(4);
assertThat(result.getMax()).isEqualTo(3);
assertThat(result.getMin()).isEqualTo(1);
assertThat(result.getSum()).isEqualTo(8);
}
@Test
public void whenAveraging_shouldAverage() throws Exception {
final Double result = givenList.stream()
.collect(averagingDouble(String::length));
final Double result = givenList.stream().collect(averagingDouble(String::length));
assertThat(result)
.isEqualTo(2);
assertThat(result).isEqualTo(2);
}
@Test
public void whenSumming_shouldSum() throws Exception {
final Double result = givenList.stream()
.collect(summingDouble(String::length));
final Double result = givenList.stream().collect(summingDouble(String::length));
assertThat(result)
.isEqualTo(8);
assertThat(result).isEqualTo(8);
}
@Test
public void whenMaxingBy_shouldMaxBy() throws Exception {
final Optional<String> result = givenList.stream()
.collect(maxBy(Comparator.naturalOrder()));
final Optional<String> result = givenList.stream().collect(maxBy(Comparator.naturalOrder()));
assertThat(result)
.isPresent()
.hasValue("dd");
assertThat(result).isPresent().hasValue("dd");
}
@Test
public void whenGroupingBy_shouldGroupBy() throws Exception {
final Map<Integer, Set<String>> result = givenList.stream()
.collect(groupingBy(String::length, toSet()));
final Map<Integer, Set<String>> result = givenList.stream().collect(groupingBy(String::length, toSet()));
assertThat(result)
.containsEntry(1, newHashSet("a"))
.containsEntry(2, newHashSet("bb", "dd"))
.containsEntry(3, newHashSet("ccc"));
assertThat(result).containsEntry(1, newHashSet("a")).containsEntry(2, newHashSet("bb", "dd")).containsEntry(3, newHashSet("ccc"));
}
@Test
public void whenCreatingCustomCollector_shouldCollect() throws Exception {
final ImmutableSet<String> result = givenList.stream()
.collect(toImmutableSet());
final ImmutableSet<String> result = givenList.stream().collect(toImmutableSet());
assertThat(result)
.isInstanceOf(ImmutableSet.class)
.contains("a", "bb", "ccc", "dd");
assertThat(result).isInstanceOf(ImmutableSet.class).contains("a", "bb", "ccc", "dd");
}
core-java/src/test/java/com/baeldung/completablefuture/CompletableFutureTest.java
+4 -13
View File
@@ -43,7 +43,6 @@ public class CompletableFutureTest {
}
public Future<String> calculateAsyncWithCancellation() throws InterruptedException {
CompletableFuture<String> completableFuture = new CompletableFuture<>();
@@ -56,7 +55,6 @@ public class CompletableFutureTest {
return completableFuture;
}
@Test(expected = CancellationException.class)
public void whenCancelingTheFuture_thenThrowsCancellationException() throws ExecutionException, InterruptedException {
@@ -110,8 +108,7 @@ public class CompletableFutureTest {
@Test
public void whenUsingThenCompose_thenFuturesExecuteSequentially() throws ExecutionException, InterruptedException {
CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync(() -> "Hello")
.thenCompose(s -> CompletableFuture.supplyAsync(() -> s + " World"));
CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync(() -> "Hello").thenCompose(s -> CompletableFuture.supplyAsync(() -> s + " World"));
assertEquals("Hello World", completableFuture.get());
@@ -120,9 +117,7 @@ public class CompletableFutureTest {
@Test
public void whenUsingThenCombine_thenWaitForExecutionOfBothFutures() throws ExecutionException, InterruptedException {
CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync(() -> "Hello")
.thenCombine(CompletableFuture.supplyAsync(() -> " World"),
(s1, s2) -> s1 + s2);
CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync(() -> "Hello").thenCombine(CompletableFuture.supplyAsync(() -> " World"), (s1, s2) -> s1 + s2);
assertEquals("Hello World", completableFuture.get());
@@ -131,9 +126,7 @@ public class CompletableFutureTest {
@Test
public void whenUsingThenAcceptBoth_thenWaitForExecutionOfBothFutures() throws ExecutionException, InterruptedException {
CompletableFuture.supplyAsync(() -> "Hello")
.thenAcceptBoth(CompletableFuture.supplyAsync(() -> " World"),
(s1, s2) -> System.out.println(s1 + s2));
CompletableFuture.supplyAsync(() -> "Hello").thenAcceptBoth(CompletableFuture.supplyAsync(() -> " World"), (s1, s2) -> System.out.println(s1 + s2));
}
@@ -154,9 +147,7 @@ public class CompletableFutureTest {
assertTrue(future2.isDone());
assertTrue(future3.isDone());
String combined = Stream.of(future1, future2, future3)
.map(CompletableFuture::join)
.collect(Collectors.joining(" "));
String combined = Stream.of(future1, future2, future3).map(CompletableFuture::join).collect(Collectors.joining(" "));
assertEquals("Hello Beautiful World", combined);
core-java/src/test/java/com/baeldung/dateapi/JavaUtilTimeTest.java → core-java/src/test/java/com/baeldung/dateapi/JavaUtilTimeUnitTest.java
+1 -1
View File
@@ -14,7 +14,7 @@ import java.time.temporal.ChronoUnit;
import static org.assertj.core.api.Assertions.assertThat;
public class JavaUtilTimeTest {
public class JavaUtilTimeUnitTest {
@Test
public void currentTime() {
core-java/src/test/java/com/baeldung/functionalinterface/FunctionalInterfaceTest.java → core-java/src/test/java/com/baeldung/functionalinterface/FunctionalInterfaceUnitTest.java
+27 -44
View File
@@ -1,7 +1,8 @@
package com.baeldung.functionalinterface;
import com.google.common.util.concurrent.Uninterruptibles;
import org.junit.Test;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.Arrays;
import java.util.HashMap;
@@ -13,54 +14,43 @@ import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.junit.Assert.*;
import org.junit.Test;
public class FunctionalInterfaceTest {
import com.google.common.util.concurrent.Uninterruptibles;
public class FunctionalInterfaceUnitTest {
@Test
public void whenPassingLambdaToComputeIfAbsent_thenTheValueGetsComputedAndPutIntoMap() {
Map<String, Integer> nameMap = new HashMap<>();
Integer value = nameMap.computeIfAbsent("John", s -> s.length());
assertEquals(new Integer(4), nameMap.get("John"));
assertEquals(new Integer(4), value);
}
@Test
public void whenPassingMethodReferenceToComputeIfAbsent_thenTheValueGetsComputedAndPutIntoMap() {
Map<String, Integer> nameMap = new HashMap<>();
Integer value = nameMap.computeIfAbsent("John", String::length);
assertEquals(new Integer(4), nameMap.get("John"));
assertEquals(new Integer(4), value);
}
public byte[] transformArray(short[] array, ShortToByteFunction function) {
byte[] transformedArray = new byte[array.length];
for (int i = 0; i < array.length; i++) {
transformedArray[i] = function.applyAsByte(array[i]);
}
return transformedArray;
}
@Test
public void whenUsingCustomFunctionalInterfaceForPrimitives_thenCanUseItAsLambda() {
short[] array = {(short) 1, (short) 2, (short) 3};
short[] array = { (short) 1, (short) 2, (short) 3 };
byte[] transformedArray = transformArray(array, s -> (byte) (s * 2));
byte[] expectedArray = {(byte) 2, (byte) 4, (byte) 6};
byte[] expectedArray = { (byte) 2, (byte) 4, (byte) 6 };
assertArrayEquals(expectedArray, transformedArray);
}
@Test
public void whenUsingBiFunction_thenCanUseItToReplaceMapValues() {
Map<String, Integer> salaries = new HashMap<>();
salaries.put("John", 40000);
salaries.put("Freddy", 30000);
@@ -71,22 +61,18 @@ public class FunctionalInterfaceTest {
assertEquals(new Integer(50000), salaries.get("John"));
assertEquals(new Integer(30000), salaries.get("Freddy"));
assertEquals(new Integer(60000), salaries.get("Samuel"));
}
@Test
public void whenPassingLambdaToThreadConstructor_thenLambdaInferredToRunnable() {
Thread thread = new Thread(() -> System.out.println("Hello From Another Thread"));
thread.start();
}
@Test
public void whenUsingSupplierToGenerateNumbers_thenCanUseItInStreamGenerate() {
int[] fibs = {0, 1};
int[] fibs = { 0, 1 };
Stream<Integer> fibonacci = Stream.generate(() -> {
int result = fibs[1];
int fib3 = fibs[0] + fibs[1];
@@ -95,55 +81,44 @@ public class FunctionalInterfaceTest {
return result;
});
List<Integer> fibonacci5 = fibonacci.limit(5)
.collect(Collectors.toList());
List<Integer> fibonacci5 = fibonacci.limit(5).collect(Collectors.toList());
assertEquals(new Integer(1), fibonacci5.get(0));
assertEquals(new Integer(1), fibonacci5.get(1));
assertEquals(new Integer(2), fibonacci5.get(2));
assertEquals(new Integer(3), fibonacci5.get(3));
assertEquals(new Integer(5), fibonacci5.get(4));
}
@Test
public void whenUsingConsumerInForEach_thenConsumerExecutesForEachListElement() {
List<String> names = Arrays.asList("John", "Freddy", "Samuel");
names.forEach(name -> System.out.println("Hello, " + name));
}
@Test
public void whenUsingBiConsumerInForEach_thenConsumerExecutesForEachMapElement() {
Map<String, Integer> ages = new HashMap<>();
ages.put("John", 25);
ages.put("Freddy", 24);
ages.put("Samuel", 30);
ages.forEach((name, age) -> System.out.println(name + " is " + age + " years old"));
}
@Test
public void whenUsingPredicateInFilter_thenListValuesAreFilteredOut() {
List<String> names = Arrays.asList("Angela", "Aaron", "Bob", "Claire", "David");
List<String> namesWithA = names.stream()
.filter(name -> name.startsWith("A"))
.collect(Collectors.toList());
List<String> namesWithA = names.stream().filter(name -> name.startsWith("A")).collect(Collectors.toList());
assertEquals(2, namesWithA.size());
assertTrue(namesWithA.contains("Angela"));
assertTrue(namesWithA.contains("Aaron"));
}
@Test
public void whenUsingUnaryOperatorWithReplaceAll_thenAllValuesInTheListAreReplaced() {
List<String> names = Arrays.asList("bob", "josh", "megan");
names.replaceAll(String::toUpperCase);
@@ -151,7 +126,6 @@ public class FunctionalInterfaceTest {
assertEquals("BOB", names.get(0));
assertEquals("JOSH", names.get(1));
assertEquals("MEGAN", names.get(2));
}
@Test
@@ -159,8 +133,7 @@ public class FunctionalInterfaceTest {
List<Integer> values = Arrays.asList(3, 5, 8, 9, 12);
int sum = values.stream()
.reduce(0, (i1, i2) -> i1 + i2);
int sum = values.stream().reduce(0, (i1, i2) -> i1 + i2);
assertEquals(37, sum);
@@ -178,10 +151,6 @@ public class FunctionalInterfaceTest {
}
public double squareLazy(Supplier<Double> lazyValue) {
return Math.pow(lazyValue.get(), 2);
}
@Test
public void whenUsingSupplierToGenerateValue_thenValueIsGeneratedLazily() {
@@ -196,4 +165,18 @@ public class FunctionalInterfaceTest {
}
//
public double squareLazy(Supplier<Double> lazyValue) {
return Math.pow(lazyValue.get(), 2);
}
public byte[] transformArray(short[] array, ShortToByteFunction function) {
byte[] transformedArray = new byte[array.length];
for (int i = 0; i < array.length; i++) {
transformedArray[i] = function.applyAsByte(array[i]);
}
return transformedArray;
}
}

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