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Merge remote-tracking branch 'origin/master'

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slavisa-baeldung
2016-12-04 10:00:06 +01:00
parent 5925abc243 3a00e57002
commit 1736f681ef
10 changed files with 182 additions and 470 deletions
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16
core-java/src/test/java/com/baeldung/java/nio2/async/AsyncEchoClient.java
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@@ -40,18 +40,22 @@ public class AsyncEchoClient {
}
}
public String sendMessage(String message) throws Exception {
public String sendMessage(String message) {
byte[] byteMsg = message.getBytes();
ByteBuffer buffer = ByteBuffer.wrap(byteMsg);
Future<Integer> writeResult = client.write(buffer);
//run some code
writeResult.get();
try {
writeResult.get();
} catch (Exception e) {
e.printStackTrace();
}
buffer.flip();
Future<Integer> readResult = client.read(buffer);
//run some code
readResult.get();
try {
readResult.get();
} catch (Exception e) {
e.printStackTrace();
String echo = new String(buffer.array()).trim();
buffer.clear();
return echo;

18
core-java/src/test/java/com/baeldung/java/nio2/async/AsyncEchoServer2.java
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@@ -58,18 +58,19 @@ public class AsyncEchoServer2 {
@Override
public void completed(Integer result, Map<String, Object> attachment) {
String action = (String) attachment.get("action");
Map<String, Object> actionInfo = attachment;
String action = (String) actionInfo.get("action");
if ("read".equals(action)) {
ByteBuffer buffer = (ByteBuffer) attachment.get("buffer");
ByteBuffer buffer = (ByteBuffer) actionInfo.get("buffer");
buffer.flip();
attachment.put("action", "write");
clientChannel.write(buffer, attachment, this);
actionInfo.put("action", "write");
clientChannel.write(buffer, actionInfo, this);
buffer.clear();
} else if ("write".equals(action)) {
ByteBuffer buffer = ByteBuffer.allocate(32);
attachment.put("action", "read");
attachment.put("buffer", buffer);
clientChannel.read(buffer, attachment, this);
actionInfo.put("action", "read");
actionInfo.put("buffer", buffer);
clientChannel.read(buffer, actionInfo, this);
}
}
@@ -81,6 +82,7 @@ public class AsyncEchoServer2 {
}
public static void main(String[] args) {
new AsyncEchoServer2();
}
@@ -95,4 +97,4 @@ public class AsyncEchoServer2 {
return builder.start();
}
}
}

288
core-java/src/test/java/org/baeldung/java/collections/JoinSplitCollectionsUnitTest.java
View File

@@ -1,179 +1,173 @@
package org.baeldung.java.collections;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.junit.Test;
import static org.junit.Assert.*;
public class JoinSplitCollectionsUnitTest {
@Test
public void whenJoiningTwoArrays_thenJoined() {
String[] animals1 = new String[] { "Dog", "Cat" };
String[] animals2 = new String[] { "Bird", "Cow" };
String[] result = Stream.concat(Arrays.stream(animals1), Arrays.stream(animals2))
.toArray(String[]::new);
@Test
public void whenJoiningTwoArrays_thenJoined() {
String[] animals1 = new String[]{"Dog", "Cat"};
String[] animals2 = new String[]{"Bird", "Cow"};
String[] result = Stream.concat(Arrays.stream(animals1), Arrays.stream(animals2))
.toArray(String[]::new);
assertArrayEquals(result, new String[] { "Dog", "Cat", "Bird", "Cow" });
}
@Test
public void whenJoiningTwoCollections_thenJoined() {
Collection<Integer> collection1 = Arrays.asList(7, 8, 9);
Collection<Integer> collection2 = Arrays.asList(10, 11, 12);
Collection<Integer> result = Stream.concat(collection1.stream(), collection2.stream())
.collect(Collectors.toList());
assertTrue(result.equals(Arrays.asList(7, 8, 9, 10, 11, 12)));
}
assertArrayEquals(result, new String[]{"Dog", "Cat", "Bird", "Cow"});
}
@Test
public void whenJoiningTwoCollectionsWithFilter_thenJoined() {
Collection<Integer> collection1 = Arrays.asList(7, 8, 11);
Collection<Integer> collection2 = Arrays.asList(9, 12, 10);
Collection<Integer> result = Stream.concat(collection1.stream(), collection2.stream())
.filter(next -> next <= 10)
.collect(Collectors.toList());
assertTrue(result.equals(Arrays.asList(7, 8, 9, 10)));
}
@Test
public void whenJoiningTwoCollections_thenJoined() {
Collection<Integer> collection1 = Arrays.asList(7, 8, 9);
Collection<Integer> collection2 = Arrays.asList(10, 11, 12);
Collection<Integer> result = Stream.concat(collection1.stream(), collection2.stream())
.collect(Collectors.toList());
@Test
public void whenConvertArrayToString_thenConverted() {
String[] colors = new String[] { "Red", "Blue", "Green", "Yellow" };
String result = Arrays.stream(colors)
.collect(Collectors.joining(", "));
assertTrue(result.equals(Arrays.asList(7, 8, 9, 10, 11, 12)));
}
assertEquals(result, "Red, Blue, Green, Yellow");
}
@Test
public void whenJoiningTwoCollectionsWithFilter_thenJoined() {
Collection<Integer> collection1 = Arrays.asList(7, 8, 11);
Collection<Integer> collection2 = Arrays.asList(9, 12, 10);
Collection<Integer> result = Stream.concat(collection1.stream(), collection2.stream())
.filter(next -> next <= 10)
.collect(Collectors.toList());
@Test
public void whenConvertCollectionToString_thenConverted() {
Collection<String> directions = Arrays.asList("Left", "Right", "Top", "Bottom");
String result = directions.stream()
.collect(Collectors.joining(", "));
assertEquals(result, "Left, Right, Top, Bottom");
}
assertTrue(result.equals(Arrays.asList(7, 8, 9, 10)));
}
@Test
public void whenConvertMapToString_thenConverted() {
Map<Integer, String> users = new HashMap<>();
users.put(1, "John Doe");
users.put(2, "Paul Smith");
users.put(3, "Susan Anderson");
@Test
public void whenConvertArrayToString_thenConverted() {
String[] colors = new String[]{"Red", "Blue", "Green", "Yellow"};
String result = Arrays.stream(colors)
.collect(Collectors.joining(", "));
String result = users.entrySet().stream().map(entry -> entry.getKey() + " = " + entry.getValue())
.collect(Collectors.joining(", "));
assertEquals(result, "Red, Blue, Green, Yellow");
}
assertEquals(result, "1 = John Doe, 2 = Paul Smith, 3 = Susan Anderson");
}
@Test
public void whenConvertCollectionToString_thenConverted() {
Collection<String> directions = Arrays.asList("Left", "Right", "Top", "Bottom");
String result = directions.stream()
.collect(Collectors.joining(", "));
@Test
public void whenConvertNestedCollectionToString_thenConverted() {
Collection<List<String>> nested = new ArrayList<>();
nested.add(Arrays.asList("Left", "Right", "Top", "Bottom"));
nested.add(Arrays.asList("Red", "Blue", "Green", "Yellow"));
String result = nested.stream()
.map(nextList -> nextList.stream()
.collect(Collectors.joining("-")))
.collect(Collectors.joining("; "));
assertEquals(result, "Left-Right-Top-Bottom; Red-Blue-Green-Yellow");
}
assertEquals(result, "Left, Right, Top, Bottom");
}
@Test
public void whenConvertCollectionToStringAndSkipNull_thenConverted() {
Collection<String> fruits = Arrays.asList("Apple", "Orange", null, "Grape");
String result = fruits.stream()
.filter(next -> next != null)
.collect(Collectors.joining(", "));
assertEquals(result, "Apple, Orange, Grape");
}
@Test
public void whenConvertMapToString_thenConverted() {
Map<Integer, String> users = new HashMap<>();
users.put(1, "John Doe");
users.put(2, "Paul Smith");
users.put(3, "Susan Anderson");
@Test
public void whenSplitCollectionHalf_thenConverted() {
Collection<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Collection<Integer> result1 = new ArrayList<>();
Collection<Integer> result2 = new ArrayList<>();
AtomicInteger count = new AtomicInteger();
int midpoint = Math.round(numbers.size() / 2);
numbers.forEach(next -> {
int index = count.getAndIncrement();
if(index < midpoint){
result1.add(next);
}else{
result2.add(next);
}
});
assertTrue(result1.equals(Arrays.asList(1, 2, 3, 4, 5)));
assertTrue(result2.equals(Arrays.asList(6, 7, 8, 9, 10)));
}
@Test
public void whenSplitArrayByWordLength_thenConverted() {
String[] words = new String[]{"bye", "cold", "it", "and", "my", "word"};
Map<Integer, List<String>> result = Arrays.stream(words)
.collect(Collectors.groupingBy(word -> word.length()));
assertTrue(result.get(2).equals(Arrays.asList("it", "my")));
assertTrue(result.get(3).equals(Arrays.asList("bye", "and")));
assertTrue(result.get(4).equals(Arrays.asList("cold", "word")));
}
String result = users.entrySet().stream()
.map(entry -> entry.getKey() + " = " + entry.getValue())
.collect(Collectors.joining(", "));
@Test
public void whenConvertStringToArray_thenConverted() {
String colors = "Red, Blue, Green, Yellow";
String[] result = colors.split(", ");
assertEquals(result, "1 = John Doe, 2 = Paul Smith, 3 = Susan Anderson");
}
assertArrayEquals(result, new String[] { "Red", "Blue", "Green", "Yellow" });
}
@Test
public void whenConvertNestedCollectionToString_thenConverted() {
Collection<List<String>> nested = new ArrayList<>();
nested.add(Arrays.asList("Left", "Right", "Top", "Bottom"));
nested.add(Arrays.asList("Red", "Blue", "Green", "Yellow"));
@Test
public void whenConvertStringToCollection_thenConverted() {
String colors = "Left, Right, Top, Bottom";
Collection<String> result = Arrays.asList(colors.split(", "));
String result = nested.stream()
.map(nextList -> nextList.stream()
.collect(Collectors.joining("-")))
.collect(Collectors.joining("; "));
assertTrue(result.equals(Arrays.asList("Left", "Right", "Top", "Bottom")));
}
assertEquals(result, "Left-Right-Top-Bottom; Red-Blue-Green-Yellow");
}
@Test
public void whenConvertStringToMap_thenConverted() {
String users = "1 = John Doe, 2 = Paul Smith, 3 = Susan Anderson";
@Test
public void whenConvertCollectionToStringAndSkipNull_thenConverted() {
Collection<String> fruits = Arrays.asList("Apple", "Orange", null, "Grape");
String result = fruits.stream()
.filter(Objects::nonNull)
.collect(Collectors.joining(", "));
Map<Integer, String> result = Arrays.stream(users.split(", "))
.map(next -> next.split(" = "))
.collect(Collectors.toMap(entry -> Integer.parseInt(entry[0]), entry -> entry[1]));
assertEquals(result, "Apple, Orange, Grape");
}
assertEquals(result.get(1), "John Doe");
assertEquals(result.get(2), "Paul Smith");
assertEquals(result.get(3), "Susan Anderson");
}
@Test
public void whenSplitCollectionHalf_thenConverted() {
Collection<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Collection<Integer> result1 = new ArrayList<>();
Collection<Integer> result2 = new ArrayList<>();
AtomicInteger count = new AtomicInteger();
int midpoint = Math.round(numbers.size() / 2);
@Test
public void whenConvertCollectionToStringMultipleSeparators_thenConverted() {
String fruits = "Apple. , Orange, Grape. Lemon";
numbers.forEach(next -> {
int index = count.getAndIncrement();
if (index < midpoint) {
result1.add(next);
} else {
result2.add(next);
}
});
Collection<String> result = Arrays.stream(fruits.split("[,|.]"))
.map(String::trim)
.filter(next -> !next.isEmpty())
.collect(Collectors.toList());
assertTrue(result1.equals(Arrays.asList(1, 2, 3, 4, 5)));
assertTrue(result2.equals(Arrays.asList(6, 7, 8, 9, 10)));
}
assertTrue(result.equals(Arrays.asList("Apple", "Orange", "Grape", "Lemon")));
}
@Test
public void whenSplitArrayByWordLength_thenConverted() {
String[] words = new String[]{"bye", "cold", "it", "and", "my", "word"};
Map<Integer, List<String>> result = Arrays.stream(words)
.collect(Collectors.groupingBy(String::length));
assertTrue(result.get(2).equals(Arrays.asList("it", "my")));
assertTrue(result.get(3).equals(Arrays.asList("bye", "and")));
assertTrue(result.get(4).equals(Arrays.asList("cold", "word")));
}
@Test
public void whenConvertStringToArray_thenConverted() {
String colors = "Red, Blue, Green, Yellow";
String[] result = colors.split(", ");
assertArrayEquals(result, new String[]{"Red", "Blue", "Green", "Yellow"});
}
@Test
public void whenConvertStringToCollection_thenConverted() {
String colors = "Left, Right, Top, Bottom";
Collection<String> result = Arrays.asList(colors.split(", "));
assertTrue(result.equals(Arrays.asList("Left", "Right", "Top", "Bottom")));
}
@Test
public void whenConvertStringToMap_thenConverted() {
String users = "1 = John Doe, 2 = Paul Smith, 3 = Susan Anderson";
Map<Integer, String> result = Arrays.stream(users.split(", "))
.map(next -> next.split(" = "))
.collect(Collectors.toMap(entry -> Integer.parseInt(entry[0]), entry -> entry[1]));
assertEquals(result.get(1), "John Doe");
assertEquals(result.get(2), "Paul Smith");
assertEquals(result.get(3), "Susan Anderson");
}
@Test
public void whenConvertCollectionToStringMultipleSeparators_thenConverted() {
String fruits = "Apple. , Orange, Grape. Lemon";
Collection<String> result = Arrays.stream(fruits.split("[,|.]"))
.map(String::trim)
.filter(next -> !next.isEmpty())
.collect(Collectors.toList());
assertTrue(result.equals(Arrays.asList("Apple", "Orange", "Grape", "Lemon")));
}
}