Merge branch 'master' into BAEL-19881

README.md

@@ -1,3 +1,4 @@
+**UPDATE**: The price of "Learn Spring Security OAuth" will permanently change on the 11th of December, along with the upcoming OAuth2 material: http://bit.ly/github-lss
 
 The Courses
 ==============================

algorithms-miscellaneous-5/README.md

@@ -10,4 +10,5 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
 - [Find If Two Numbers Are Relatively Prime in Java](https://www.baeldung.com/java-two-relatively-prime-numbers)
 - [Knapsack Problem Implementation in Java](https://www.baeldung.com/java-knapsack)
 - [How to Determine if a Binary Tree is Balanced](https://www.baeldung.com/java-balanced-binary-tree)
+- [The Caesar Cipher in Java](https://www.baeldung.com/java-caesar-cipher)
 - More articles: [[<-- prev]](/../algorithms-miscellaneous-4)

algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/mergesortedarrays/SortedArrays.java

@@ -0,0 +1,33 @@
+package com.baeldung.algorithms.mergesortedarrays;
+
+public class SortedArrays {
+
+    public static int[] merge(int[] foo, int[] bar) {
+
+        int fooLength = foo.length;
+        int barLength = bar.length;
+
+        int[] merged = new int[fooLength + barLength];
+
+        int fooPosition, barPosition, mergedPosition;
+        fooPosition = barPosition = mergedPosition = 0;
+
+        while (fooPosition < fooLength && barPosition < barLength) {
+            if (foo[fooPosition] < bar[barPosition]) {
+                merged[mergedPosition++] = foo[fooPosition++];
+            } else {
+                merged[mergedPosition++] = bar[barPosition++];
+            }
+        }
+
+        while (fooPosition < fooLength) {
+            merged[mergedPosition++] = foo[fooPosition++];
+        }
+
+        while (barPosition < barLength) {
+            merged[mergedPosition++] = bar[barPosition++];
+        }
+
+        return merged;
+    }
+}

algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/mergesortedarrays/SortedArraysUnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.algorithms.mergesortedarrays;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import org.junit.jupiter.api.Test;
+
+import com.baeldung.algorithms.mergesortedarrays.SortedArrays;
+
+public class SortedArraysUnitTest {
+
+    @Test
+    public void givenTwoSortedArrays_whenMerged_thenReturnMergedSortedArray() {
+
+        int[] foo = { 3, 7 };
+        int[] bar = { 4, 8, 11 };
+        int[] merged = { 3, 4, 7, 8, 11 };
+
+        assertArrayEquals(merged, SortedArrays.merge(foo, bar));
+    }
+
+    @Test
+    public void givenTwoSortedArraysWithDuplicates_whenMerged_thenReturnMergedSortedArray() {
+
+        int[] foo = { 3, 3, 7 };
+        int[] bar = { 4, 8, 8, 11 };
+        int[] merged = { 3, 3, 4, 7, 8, 8, 11 };
+
+        assertArrayEquals(merged, SortedArrays.merge(foo, bar));
+    }
+}

core-java-modules/core-java-11/README.md

@@ -12,3 +12,4 @@ This module contains articles about Java 11 core features
 - [An Introduction to Epsilon GC: A No-Op Experimental Garbage Collector](https://www.baeldung.com/jvm-epsilon-gc-garbage-collector)
 - [Guide to jlink](https://www.baeldung.com/jlink)
 - [Negate a Predicate Method Reference with Java 11](https://www.baeldung.com/java-negate-predicate-method-reference)
+- [Benchmark JDK Collections vs Eclipse Collections](https://www.baeldung.com/jdk-collections-vs-eclipse-collections)

core-java-modules/core-java-11/src/test/java/com/baeldung/patternreuse/PatternJava11UnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.patternreuse;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Predicate;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class PatternJava11UnitTest {
+
+    @Test
+    public void givenPreCompiledPattern_whenCallAsMatchPredicate_thenReturnMatchPredicateToMatchesThePatternInTheListElements() {
+        List<String> namesToValidate = Arrays.asList("Fabio Silva", "Fabio Luis Silva");
+        Pattern firstLastNamePreCompiledPattern = Pattern.compile("[a-zA-Z]{3,} [a-zA-Z]{3,}");
+
+        Predicate<String> patternAsMatchPredicate = firstLastNamePreCompiledPattern.asMatchPredicate();
+        List<String> validatedNames = namesToValidate.stream()
+                .filter(patternAsMatchPredicate)
+                .collect(Collectors.toList());
+
+        assertTrue(validatedNames.contains("Fabio Silva"));
+        assertFalse(validatedNames.contains("Fabio Luis Silva"));
+    }
+}

core-java-modules/core-java-arrays-2/src/test/java/com/baeldung/arraysort/SortComparisonUnitTest.java

@@ -0,0 +1,185 @@
+package com.baeldung.arraysort;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNotSame;
+
+import java.util.Arrays;
+import java.util.Random;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.FixMethodOrder;
+import org.junit.Test;
+import org.junit.runners.MethodSorters;
+
+/**
+ * Time taken by JUnit test cases can be seen in JUnit Runner
+ * @author rchaudhary23
+ *
+ */
+
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+public class SortComparisonUnitTest {
+
+    private int[] sizeOfArrays = { 1000, 10000, 100000, 1000000 };
+
+    private int[] _1000_elements_array;
+    private int[] _10000_elements_array;
+    private int[] _100000_elements_array;
+    private int[] _1000000_elements_array;
+
+    @Before
+    public void setUp() throws Exception {
+
+        _1000_elements_array = new int[sizeOfArrays[0]];
+        _10000_elements_array = new int[sizeOfArrays[1]];
+        _100000_elements_array = new int[sizeOfArrays[2]];
+        _1000000_elements_array = new int[sizeOfArrays[3]];
+
+        Random random = new Random();
+        for (int i = 0; i < sizeOfArrays[0]; i++) {
+            _1000_elements_array[i] = random.nextInt(sizeOfArrays[0]) + random.nextInt(sizeOfArrays[0]);
+        }
+
+        for (int i = 0; i < sizeOfArrays[1]; i++) {
+            _10000_elements_array[i] = random.nextInt(sizeOfArrays[1]) + random.nextInt(sizeOfArrays[1]);
+        }
+
+        for (int i = 0; i < sizeOfArrays[2]; i++) {
+            _100000_elements_array[i] = random.nextInt(sizeOfArrays[2]) + random.nextInt(sizeOfArrays[2]);
+        }
+
+        for (int i = 0; i < sizeOfArrays[3]; i++) {
+            _1000000_elements_array[i] = random.nextInt(sizeOfArrays[3]) + random.nextInt(sizeOfArrays[3]);
+        }
+
+    }
+
+    @Test
+    public void givenArrayOfIntegers_whenUsingArraysSortMethod_thenSortFullArrayInAscendingOrder() {
+
+        int[] array = { 10, 4, 6, 2, 1, 9, 7, 8, 3, 5 };
+        int[] expected = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+
+        Arrays.sort(array);
+
+        assertArrayEquals(expected, array);
+
+    }
+
+    @Test
+    public void givenArrayOfIntegers_whenUsingArraysSortMethodWithRange_thenSortRangeOfArrayInAscendingOrder() {
+        int[] array = { 10, 4, 6, 2, 1, 9, 7, 8, 3, 5 };
+        int[] expected = { 10, 4, 1, 2, 6, 7, 8, 9, 3, 5 };
+
+        Arrays.sort(array, 2, 8);
+
+        assertArrayEquals(expected, array);
+    }
+
+    @Test
+    public void givenArrayOfIntegers_whenUsingArraysParallelSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] array = { 10, 4, 6, 2, 1, 9, 7, 8, 3, 5 };
+        int[] expected = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+
+        Arrays.parallelSort(array);
+
+        assertArrayEquals(expected, array);
+    }
+
+    @Test
+    public void givenArrayOfIntegers_whenUsingArraysParallelSortMethodWithRange_thenSortRangeOfArrayInAscendingOrder() {
+        int[] array = { 10, 4, 6, 2, 1, 9, 7, 8, 3, 5 };
+        int[] expected = { 10, 4, 1, 2, 6, 7, 8, 9, 3, 5 };
+
+        Arrays.parallelSort(array, 2, 8);
+
+        assertArrayEquals(expected, array);
+    }
+
+    @Test
+    public void givenIntegerArrayOf1000Elements_whenUsingArraysSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] sequentialDataSet = Arrays.copyOf(_1000_elements_array, _1000_elements_array.length);
+        Arrays.sort(sequentialDataSet);
+
+        assertNotNull(sequentialDataSet);
+        assertNotSame(Arrays.copyOf(_1000_elements_array, _1000_elements_array.length), sequentialDataSet);
+
+    }
+
+    @Test
+    public void givenIntegerArrayOf1000Elements_whenUsingArraysParallelSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] parallelDataSet = Arrays.copyOf(_1000_elements_array, _1000_elements_array.length);
+        Arrays.parallelSort(parallelDataSet);
+
+        assertNotNull(parallelDataSet);
+        assertNotSame(Arrays.copyOf(_1000_elements_array, _1000_elements_array.length), parallelDataSet);
+
+    }
+
+    @Test
+    public void givenIntegerArrayOf10000Elements_whenUsingArraysSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] sequentialDataSet = Arrays.copyOf(_10000_elements_array, _10000_elements_array.length);
+        Arrays.sort(sequentialDataSet);
+
+        assertNotNull(sequentialDataSet);
+        assertNotSame(Arrays.copyOf(_10000_elements_array, _10000_elements_array.length), sequentialDataSet);
+    }
+
+    @Test
+    public void givenIntegerArrayOf10000Elements_whenUsingArraysParallelSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] parallelDataSet = Arrays.copyOf(_10000_elements_array, _10000_elements_array.length);
+        Arrays.parallelSort(parallelDataSet);
+
+        assertNotNull(parallelDataSet);
+        assertNotSame(Arrays.copyOf(_10000_elements_array, _10000_elements_array.length), parallelDataSet);
+    }
+
+    @Test
+    public void givenIntegerArrayOf100000Elements_whenUsingArraysSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] sequentialDataSet = Arrays.copyOf(_100000_elements_array, _100000_elements_array.length);
+        Arrays.sort(sequentialDataSet);
+
+        assertNotNull(sequentialDataSet);
+        assertNotSame(Arrays.copyOf(_100000_elements_array, _100000_elements_array.length), sequentialDataSet);
+    }
+
+    @Test
+    public void givenIntegerArrayOf100000Elements_whenUsingArraysParallelSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] parallelDataSet = Arrays.copyOf(_100000_elements_array, _100000_elements_array.length);
+        Arrays.parallelSort(parallelDataSet);
+
+        assertNotNull(parallelDataSet);
+        assertNotSame(Arrays.copyOf(_100000_elements_array, _100000_elements_array.length), parallelDataSet);
+    }
+
+    @Test
+    public void givenIntegerArrayOf1000000Elements_whenUsingArraysSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] sequentialDataSet = Arrays.copyOf(_1000000_elements_array, _1000000_elements_array.length);
+        Arrays.sort(sequentialDataSet);
+
+        assertNotNull(sequentialDataSet);
+        assertNotSame(Arrays.copyOf(_1000000_elements_array, _1000000_elements_array.length), sequentialDataSet);
+    }
+
+    @Test
+    public void givenIntegerArrayOf1000000Elements_whenUsingArraysParallelSortMethod_thenSortFullArrayInAscendingOrder() {
+        int[] parallelDataSet = Arrays.copyOf(_1000000_elements_array, _1000000_elements_array.length);
+        Arrays.parallelSort(parallelDataSet);
+
+        assertNotNull(parallelDataSet);
+        assertNotSame(Arrays.copyOf(_1000000_elements_array, _1000000_elements_array.length), parallelDataSet);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        sizeOfArrays = null;
+        _1000_elements_array = null;
+        _10000_elements_array = null;
+        _100000_elements_array = null;
+        _1000000_elements_array = null;
+    }
+}
+
+

core-java-modules/core-java-lang-math/README.md

@@ -7,3 +7,5 @@
 - [Java 8 Unsigned Arithmetic Support](https://www.baeldung.com/java-unsigned-arithmetic)
 - [How to Separate Double into Integer and Decimal Parts](https://www.baeldung.com/java-separate-double-into-integer-decimal-parts)
 - [The strictfp Keyword in Java](https://www.baeldung.com/java-strictfp)
+- [Basic Calculator in Java](https://www.baeldung.com/java-basic-calculator)
+- [Overflow and Underflow in Java](https://www.baeldung.com/java-overflow-underflow)

core-java-modules/core-java-text/pom.xml

@@ -14,6 +14,19 @@
         <relativePath>../../parent-java</relativePath>
     </parent>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh-core.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${jmh-core.version}</version>
+        </dependency>
+    </dependencies>
+
     <build>
         <finalName>core-java-text</finalName>
         <resources>

core-java-modules/core-java-text/src/main/java/com/baeldung/patternreuse/PatternPerformanceComparison.java

@@ -0,0 +1,92 @@
+package com.baeldung.patternreuse;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.infra.Blackhole;
+import org.openjdk.jmh.runner.RunnerException;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@Fork(value = 1, warmups = 1)
+@Warmup(iterations = 5)
+@State(Scope.Benchmark)
+public class PatternPerformanceComparison {
+
+    private static final String PATTERN = "\\d*[02468]";
+    private static List<String> values;
+
+    private static Matcher matcherFromPreCompiledPattern;
+    private static Pattern preCompiledPattern;
+
+    public static void main(String[] args) throws IOException, RunnerException {
+        org.openjdk.jmh.Main.main(args);
+    }
+
+    @Benchmark
+    public void matcherFromPreCompiledPatternResetMatches(Blackhole bh) {
+        //With pre-compiled pattern and reusing the matcher
+        // 1 Pattern object created
+        // 1 Matcher objects created
+        for (String value : values) {
+            bh.consume(matcherFromPreCompiledPattern.reset(value).matches());
+        }
+    }
+
+    @Benchmark
+    public void preCompiledPatternMatcherMatches(Blackhole bh) {
+        // With pre-compiled pattern
+        // 1         Pattern object created
+        // 5_000_000 Matcher objects created
+        for (String value : values) {
+            bh.consume(preCompiledPattern.matcher(value).matches());
+        }
+    }
+
+    @Benchmark
+    public void patternCompileMatcherMatches(Blackhole bh) {
+        // Above approach "Pattern.matches(PATTERN, value)" makes this internally
+        // 5_000_000 Pattern objects created
+        // 5_000_000 Matcher objects created
+        for (String value : values) {
+            bh.consume(Pattern.compile(PATTERN).matcher(value).matches());
+        }
+    }
+
+    @Benchmark
+    public void patternMatches(Blackhole bh) {
+        // Above approach "value.matches(PATTERN)" makes this internally
+        // 5_000_000 Pattern objects created
+        // 5_000_000 Matcher objects created
+        for (String value : values) {
+            bh.consume(Pattern.matches(PATTERN, value));
+        }
+    }
+
+    @Benchmark
+    public void stringMatchs(Blackhole bh) {
+        // 5_000_000 Pattern objects created
+        // 5_000_000 Matcher objects created
+        Instant start = Instant.now();
+        for (String value : values) {
+            bh.consume(value.matches(PATTERN));
+        }
+    }
+
+    @Setup()
+    public void setUp() {
+        preCompiledPattern = Pattern.compile(PATTERN);
+        matcherFromPreCompiledPattern = preCompiledPattern.matcher("");
+
+        values = new ArrayList<>();
+        for (int x = 1; x <= 5_000_000; x++) {
+            values.add(String.valueOf(x));
+        }
+    }
+}

core-java-modules/core-java-text/src/test/java/com/baeldung/patternreuse/PatternUnitTest.java

@@ -0,0 +1,63 @@
+package com.baeldung.patternreuse;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Predicate;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import static org.junit.Assert.*;
+
+public class PatternUnitTest {
+
+    private static final Pattern FIRST_LAST_NAME_PRE_COMPILED_PATTERN = Pattern.compile("[a-zA-Z]{3,} [a-zA-Z]{3,}");
+    private static final Pattern SPLIT_PRE_COMPILED_PATTERN = Pattern.compile("__");
+
+    @Test
+    public void givenPreCompiledPattern_whenCallMatcher_thenReturnAMatcherToMatches() {
+        Matcher matcherName1 = FIRST_LAST_NAME_PRE_COMPILED_PATTERN.matcher("Fabio Silva");
+        Matcher matcherName2 = FIRST_LAST_NAME_PRE_COMPILED_PATTERN.matcher("Mr. Silva");
+
+        boolean matchesName1 = matcherName1.matches();
+        boolean matchesName2 = matcherName2.matches();
+
+        assertTrue(matchesName1);
+        assertFalse(matchesName2);
+    }
+
+    @Test
+    public void givenPreCompiledPattern_whenCallAsPredicate_thenReturnPredicateToFindThePatternInTheListElements() {
+        List<String> namesToValidate = Arrays.asList("Fabio Silva", "Mr. Silva");
+        Predicate<String> patternsAsPredicate = FIRST_LAST_NAME_PRE_COMPILED_PATTERN.asPredicate();
+
+        List<String> validNames = namesToValidate.stream()
+                .filter(patternsAsPredicate)
+                .collect(Collectors.toList());
+
+        assertEquals(1, validNames.size());
+        assertTrue(validNames.contains("Fabio Silva"));
+    }
+
+    @Test
+    public void givenPreCompiledPattern_whenCallSplit_thenReturnArrayWithValuesSplitByThePattern() {
+        String[] textSplit = SPLIT_PRE_COMPILED_PATTERN.split("My_Name__is__Fabio_Silva");
+
+        assertEquals("My_Name", textSplit[0]);
+        assertEquals("is", textSplit[1]);
+        assertEquals("Fabio_Silva", textSplit[2]);
+    }
+
+    @Test
+    public void givenPreCompiledPattern_whenCallSplitAsStream_thenReturnArrayWithValuesSplitByThePattern() {
+        Stream<String> textSplitAsStream = SPLIT_PRE_COMPILED_PATTERN.splitAsStream("My_Name__is__Fabio_Silva");
+        String[] textSplit = textSplitAsStream.toArray(String[]::new);
+
+        assertEquals("My_Name", textSplit[0]);
+        assertEquals("is", textSplit[1]);
+        assertEquals("Fabio_Silva", textSplit[2]);
+    }
+}

gson/src/main/java/com/baeldung/gson/entities/ActorGson.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;

gson/src/main/java/com/baeldung/gson/entities/Animal.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 public abstract class Animal {
     public String type = "Animal";

gson/src/main/java/com/baeldung/gson/entities/Cow.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 public class Cow extends Animal {
     private String breed;

gson/src/main/java/com/baeldung/gson/entities/Dog.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 public class Dog extends Animal {
     private String petName;

gson/src/main/java/com/baeldung/gson/entities/Employee.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 public class Employee {
     private int id;

gson/src/main/java/com/baeldung/gson/entities/Movie.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 import java.util.List;
 

gson/src/main/java/com/baeldung/gson/entities/MovieWithNullValue.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 import com.google.gson.annotations.Expose;
 

gson/src/main/java/com/baeldung/gson/entities/MyClass.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 import java.util.Objects;
 

gson/src/main/java/com/baeldung/gson/entities/User.java

@@ -1,19 +1,19 @@
-package org.baeldung.gson.entities;
-
-public class User {
-
-	private int id;
-	private String name;
-	private transient String nationality;
-
-	public User(int id, String name, String nationality) {
-		this.id = id;
-		this.name = name;
-		this.nationality = nationality;
-	}
-
-	public User(int id, String name) {
-		this(id, name, null);
-	}
-
-}
+package com.baeldung.gson.entities;
+
+public class User {
+
+	private int id;
+	private String name;
+	private transient String nationality;
+
+	public User(int id, String name, String nationality) {
+		this.id = id;
+		this.name = name;
+		this.nationality = nationality;
+	}
+
+	public User(int id, String name) {
+		this(id, name, null);
+	}
+
+}

gson/src/main/java/com/baeldung/gson/entities/Weather.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.entities;
+package com.baeldung.gson.entities;
 
 import com.google.gson.annotations.SerializedName;
 

gson/src/main/java/com/baeldung/gson/primitives/models/BooleanExample.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.primitives.models;
+package com.baeldung.gson.primitives.models;
 
 public class BooleanExample {
     public boolean value;

gson/src/main/java/com/baeldung/gson/primitives/models/ByteExample.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.primitives.models;
+package com.baeldung.gson.primitives.models;
 
 public class ByteExample {
     public byte value = (byte) 1;

gson/src/main/java/com/baeldung/gson/primitives/models/CharExample.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.primitives.models;
+package com.baeldung.gson.primitives.models;
 
 public class CharExample {
     public char value;

gson/src/main/java/com/baeldung/gson/primitives/models/DoubleExample.java

@@ -1,4 +1,4 @@
-package org.baeldung.gson.primitives.models;
+package com.baeldung.gson.primitives.models;
 
 public class DoubleExample {
     public double value;