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JAVA-1522 Split core-java-modules/core-java module

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mikr
2020-06-07 16:52:25 +02:00
parent 4cb07819f3
commit aece4e5216
28 changed files with 10 additions and 86 deletions
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45
core-java-modules/core-java/src/main/java/com/baeldung/encoding/CharacterEncodingExamples.java
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@@ -1,45 +0,0 @@
package com.baeldung.encoding;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CodingErrorAction;
public class CharacterEncodingExamples {
static String readFile(String filePath, String encoding) throws IOException {
File file = new File(filePath);
StringBuffer buffer = new StringBuffer();
try (InputStreamReader isr = new InputStreamReader(new FileInputStream(file), encoding)) {
int data;
while ((data = isr.read()) != -1) {
buffer.append((char) data);
}
}
return buffer.toString();
}
static String convertToBinary(String input, String encoding) throws UnsupportedEncodingException {
byte[] bytes = input.getBytes(encoding);
StringBuffer buffer = new StringBuffer();
for (int b : bytes) {
buffer.append(Integer.toBinaryString((b + 256) % 256));
buffer.append(" ");
}
return buffer.toString();
}
static String decodeText(String input, Charset charset, CodingErrorAction codingErrorAction) throws IOException {
CharsetDecoder charsetDecoder = charset.newDecoder();
charsetDecoder.onMalformedInput(codingErrorAction);
return new BufferedReader(
new InputStreamReader(
new ByteArrayInputStream(input.getBytes()), charsetDecoder)).readLine();
}
}

101
core-java-modules/core-java/src/main/java/com/baeldung/graph/Graph.java
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@@ -1,101 +0,0 @@
package com.baeldung.graph;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
public class Graph {
private Map<Vertex, List<Vertex>> adjVertices;
Graph() {
this.adjVertices = new HashMap<Vertex, List<Vertex>>();
}
void addVertex(String label) {
adjVertices.putIfAbsent(new Vertex(label), new ArrayList<>());
}
void removeVertex(String label) {
Vertex v = new Vertex(label);
adjVertices.values().stream().forEach(e -> e.remove(v));
adjVertices.remove(new Vertex(label));
}
void addEdge(String label1, String label2) {
Vertex v1 = new Vertex(label1);
Vertex v2 = new Vertex(label2);
adjVertices.get(v1).add(v2);
adjVertices.get(v2).add(v1);
}
void removeEdge(String label1, String label2) {
Vertex v1 = new Vertex(label1);
Vertex v2 = new Vertex(label2);
List<Vertex> eV1 = adjVertices.get(v1);
List<Vertex> eV2 = adjVertices.get(v2);
if (eV1 != null)
eV1.remove(v2);
if (eV2 != null)
eV2.remove(v1);
}
List<Vertex> getAdjVertices(String label) {
return adjVertices.get(new Vertex(label));
}
String printGraph() {
StringBuffer sb = new StringBuffer();
for(Vertex v : adjVertices.keySet()) {
sb.append(v);
sb.append(adjVertices.get(v));
}
return sb.toString();
}
class Vertex {
String label;
Vertex(String label) {
this.label = label;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + getOuterType().hashCode();
result = prime * result + ((label == null) ? 0 : label.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Vertex other = (Vertex) obj;
if (!getOuterType().equals(other.getOuterType()))
return false;
if (label == null) {
if (other.label != null)
return false;
} else if (!label.equals(other.label))
return false;
return true;
}
@Override
public String toString() {
return label;
}
private Graph getOuterType() {
return Graph.this;
}
}
}

44
core-java-modules/core-java/src/main/java/com/baeldung/graph/GraphTraversal.java
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@@ -1,44 +0,0 @@
package com.baeldung.graph;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Set;
import java.util.Stack;
import com.baeldung.graph.Graph.Vertex;
public class GraphTraversal {
static Set<String> depthFirstTraversal(Graph graph, String root) {
Set<String> visited = new LinkedHashSet<String>();
Stack<String> stack = new Stack<String>();
stack.push(root);
while (!stack.isEmpty()) {
String vertex = stack.pop();
if (!visited.contains(vertex)) {
visited.add(vertex);
for (Vertex v : graph.getAdjVertices(vertex)) {
stack.push(v.label);
}
}
}
return visited;
}
static Set<String> breadthFirstTraversal(Graph graph, String root) {
Set<String> visited = new LinkedHashSet<String>();
Queue<String> queue = new LinkedList<String>();
queue.add(root);
visited.add(root);
while (!queue.isEmpty()) {
String vertex = queue.poll();
for (Vertex v : graph.getAdjVertices(vertex)) {
if (!visited.contains(v.label)) {
visited.add(v.label);
queue.add(v.label);
}
}
}
return visited;
}
}

18
core-java-modules/core-java/src/main/java/com/baeldung/objectsize/InstrumentationAgent.java
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@@ -1,18 +0,0 @@
package com.baeldung.objectsize;
import java.lang.instrument.Instrumentation;
public class InstrumentationAgent {
private static volatile Instrumentation globalInstrumentation;
public static void premain(final String agentArgs, final Instrumentation inst) {
globalInstrumentation = inst;
}
public static long getObjectSize(final Object object) {
if (globalInstrumentation == null) {
throw new IllegalStateException("Agent not initialized.");
}
return globalInstrumentation.getObjectSize(object);
}
}

59
core-java-modules/core-java/src/main/java/com/baeldung/objectsize/InstrumentationExample.java
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@@ -1,59 +0,0 @@
package com.baeldung.objectsize;
import java.util.ArrayList;
import java.util.List;
public class InstrumentationExample {
public static void printObjectSize(Object object) {
System.out.println("Object type: " + object.getClass() + ", size: " + InstrumentationAgent.getObjectSize(object) + " bytes");
}
public static void main(String[] arguments) {
String emptyString = "";
String string = "Estimating Object Size Using Instrumentation";
String[] stringArray = { emptyString, string, "com.baeldung" };
String[] anotherStringArray = new String[100];
List<String> stringList = new ArrayList<>();
StringBuilder stringBuilder = new StringBuilder(100);
int maxIntPrimitive = Integer.MAX_VALUE;
int minIntPrimitive = Integer.MIN_VALUE;
Integer maxInteger = Integer.MAX_VALUE;
Integer minInteger = Integer.MIN_VALUE;
long zeroLong = 0L;
double zeroDouble = 0.0;
boolean falseBoolean = false;
Object object = new Object();
class EmptyClass {
}
EmptyClass emptyClass = new EmptyClass();
class StringClass {
public String s;
}
StringClass stringClass = new StringClass();
printObjectSize(emptyString);
printObjectSize(string);
printObjectSize(stringArray);
printObjectSize(anotherStringArray);
printObjectSize(stringList);
printObjectSize(stringBuilder);
printObjectSize(maxIntPrimitive);
printObjectSize(minIntPrimitive);
printObjectSize(maxInteger);
printObjectSize(minInteger);
printObjectSize(zeroLong);
printObjectSize(zeroDouble);
printObjectSize(falseBoolean);
printObjectSize(Day.TUESDAY);
printObjectSize(object);
printObjectSize(emptyClass);
printObjectSize(stringClass);
}
public enum Day {
MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY
}
}

1
core-java-modules/core-java/src/main/java/com/baeldung/objectsize/MANIFEST.MF
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@@ -1 +0,0 @@
Premain-class: com.baeldung.objectsize.InstrumentationAgent

19
core-java-modules/core-java/src/main/java/com/baeldung/timer/DatabaseMigrationTask.java
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@@ -1,19 +0,0 @@
package com.baeldung.timer;
import java.util.List;
import java.util.TimerTask;
public class DatabaseMigrationTask extends TimerTask {
private List<String> oldDatabase;
private List<String> newDatabase;
public DatabaseMigrationTask(List<String> oldDatabase, List<String> newDatabase) {
this.oldDatabase = oldDatabase;
this.newDatabase = newDatabase;
}
@Override
public void run() {
newDatabase.addAll(oldDatabase);
}
}

14
core-java-modules/core-java/src/main/java/com/baeldung/timer/NewsletterTask.java
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@@ -1,14 +0,0 @@
package com.baeldung.timer;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.TimerTask;
public class NewsletterTask extends TimerTask {
@Override
public void run() {
System.out.println("Email sent at: "
+ LocalDateTime.ofInstant(Instant.ofEpochMilli(scheduledExecutionTime()), ZoneId.systemDefault()));
}
}